DIY active radar detector. Homemade radar detector (radar detector), how to make it yourself, modification. Troubleshooting methods

Practice shows that quite often everything home-made, if done well, works better than the mass-produced one. This is due to the fact that manual assembly, unlike mass assembly, is performed most carefully. In addition, you can assemble with your own hands something that is not commercially available at all. One such problem is how to make a radar. There are anti-radars and radar detectors on sale, but it is almost impossible to buy a radar itself, such as the one used by the traffic police. This special equipment does not go on sale and is therefore virtually unavailable, regardless of its price. Although if it were on sale, then it would be the price of modern electronic systems designed to control the speed of cars by the traffic police that would become the main obstacle to its acquisition.

Thinking about how to include radar in the number electronic devices made with your own hands, you must first of all understand where to get the components to assemble this rather complex device. The components include a good digital video camera and a device for laser measurement of the speed of moving objects, which can be purchased in specialized stores for aircraft modeling enthusiasts. In addition, connecting cords will be needed that will allow the laser speedometer readings and the image from the video camera to be transferred to the computer, and then record these readings along with the image of the moving car. You will also need a body problem solver, how to install a radar, consisting of two separate named electronic devices, so that both the camera and the laser speed meter are “looking” at the same object.

A laser speed meter works on the principle of recording the time after which a laser beam, pulsed by the device, reflected from the surface of a moving object, returns to the device. Such fixation when measuring speed is carried out up to 10 times, after which the device displays on its display the result of measuring the speed of the object at which it was pointed. In fact, this is a radar, and the camera is needed only to reliably record the results. The only question that remains is how to connect the radar to the computer. For this you need USB cable, since this device has standard settings for transmitting information to a computer. In the same way, through another USB port The video camera is connected to the computer using the second cable.

The camera and device are placed together in a housing that rigidly fixes them and allows both devices to “look” at the same moving object. All devices are turned on simultaneously, then the image received from the camera in online mode remains in the lower open window, and the image received from the laser speed meter is superimposed on top of it in another smaller window. The Camtasia Studio program is installed on the computer, which allows you to record everything that happens on the monitor; this program is configured according to the instructions included with it and runs in recording mode. As a result, it becomes clear how to use the radar: having turned everything on, you should point the body with the camera and meter at a moving object, and then record combined images of the moving object and speed readings from the computer monitor.

After a couple of weeks of preparation, we finally decided how to start it and what might be needed for this. The project didn't have to be very advanced; We set the difficulty level to medium. Below is an example of using a personal narrow range radar. He was supposed to look a little funny, so you can laugh!

Description and purpose of the project

The goal of the project was to create a functioning radar. The system only needs to measure distance at an angle of 90 degrees, as shown in the example above. Depending on the selected sensor, the system operates within the range of 4-30 cm, 20-150 cm and 1-5.5 m.

The results of the project will influence subsequent developments in which we attempt to integrate radar for the navigation of mobile robots in natural environments.

Electronic parts

• Voltage stabilizer LM7805 5V
• Microcontroller PIC18F452
• IR Sensor GP2D120
• Quartz resonator at 4 or 8 MHz
• Switch
• Capacitor
• 30-pin connector
• 5 triggers 74LS373
• Bread board
• Solder
• 36 indicators
• Wire 30 AWG
• Wire Tools
• Soldering iron

Detailed list of spare parts

You may or may not know everything about the parts above, so to help you understand them, a picture of each part has been included. Three new objects have appeared that were not previously specified in the project: a servo system and IR sensors. A description of the IR sensors will appear soon; as for 74HCT373 - below will be presented short review. You can always check the chip specifications by simply searching for “74HCT373.”

An eight-bit chip containing a three-stable trigger. Simply put, this chip is capable of storing 8 bits of digital logic and holding it in memory until it is erased or modified via the LE-Latch Enable pin.

Work principles

• Control pins LE and OE
• 8 Data input D0-D7
• 8 Data output D0-D7

Power (Vcc & GND.)
Output activation (OE) allows Q0-Q7 to output data to this moment located in D-triggers.
Enabling the flip-flop (LE) allows the data contained on D0-D7 to be overwritten into the D flip-flop.

Circuit overview

Scheme for of this project much more difficult than the previous ones. Our development has 4 main advantages.

1. We will be able to program images from the board being developed.
2. We will control the servo system.
3. We will take data from the IR distance sensor.
4. We will install 36 LEV indicators to display the output of data received from the IR sensor.

Circuit characteristics

Nutrition

• Power is supplied via a 9V battery connected to the LM7805 with a 1uF capacitor connected to the pin/ground to provide uninterrupted DC current to the LM7805.
• Program cycle
• Programming is accomplished by connecting two connectors from the controller to the programmer, giving the first connector on the programmer access to MCLR*/Vpp-Pin1 on the controller. For safety reasons, a rectifying diode is installed.
• IR Distance Sensor
• The IR Sensor uses one controller connector PIN 2 - RA0. The analog capabilities of this pin are used to obtain the ADC value, since only an analog signal is obtained from the IR sensor. This value tells you if there is anything within the sensor's range.

LED indication

There are a total of 40 LED indicators. Each 74HCT373 chip controls up to 8 indicators; since 40/8=5, we need 5 74HCT373 circuits to drive all 40 indicators. It should be noted in the diagram that all 5 chips use one data bus.

Theory

This development uses three main devices to create a personal radar. The IR sensor is connected to the microcontroller, and then output to the indicator segment. A visual demonstration of this process is provided:

Using different sensors
An important aspect of the accuracy of the IR sensors used in this project is that they have the same voltage characteristics, so this program Compatible with all indicators. The only thing you need to know is how the sensor is used to determine the distance displayed on the indicators.

Usage

So, let's take a look at the final appearance of the device:

That's how appearance assembled device. Let's move on to the next section and continue assembling the device.

The plastic housing below in the picture was not mentioned in the parts list. This is a regular case that can be purchased from any electronics manufacturer or retailer. First of all, you need to drill 36 holes for the indicators in the circuit and fix the indicators in them. An adhesive was used before inserting the indicators into the holes.

After the panel is soldered, we begin connecting the circuit. Each wire must be connected through a small hole in the housing.

The figure above shows the view of the panel on early stage. At the beginning of connecting the wires, there is an accumulation of a huge number of them, for example, like this:

The final touch in developing a personal radar is the ability to use it online. Wires 2-4 meters long are used when connecting the servo system and IR sensor. We make a hole in the front of the case for these wires:
Having finished with the assembly, let's move on to the software part of the development. This is, of course, a more subtle part of development than even laying wires.

The software for this device includes three main parts:

• Servo Control
• LED indication control
• input A/D/

Because everything software this project will not fit on one page, it will explain what the parts are and how they work.

Servo Control

The servo system is controlled by timers and interrupts. With two separate interrupts triggered simultaneously to create the desired sound, a 50 GHz signal is generated and the servo pointer moves in small steps to adjust the squeaking sound.
Adjustment of LED indication.
The indicators are controlled by 74LS373/74HCT373 triggers. The system constantly updates the trigger data displayed on the indicators.
A/D Input
The IR sensor provides analog output. A converter is used to determine the voltage value, indicating that the object has moved beyond the range of the IR sensor.

The assembly and configuration of the device is completed - you need to test it. Depending on the sensor you use, the indication will be different. Sensors to choose from: GP2D120, GP2Y0A21YK and GP2Y0A700K0F.

Data and Observations

The first radar test will be the close range. Tin cans were used as obstacles.

In the second video (on the first page) indicators of 20 cm - 150 cm and 1 m - 5.5 m are tested, allowing you to overcome more serious obstacles. Take a look to see what we're talking about.

Two videos will demonstrate the operation of the sensor, however, if you assemble it yourself, there may be some minor difficulties that will be described in the conclusion.

ABOUT personal radar overview

Assembling and setting up this device takes a little time. This is a project that you can do in a day, and it already has a niche application, but as time goes on, additional challenges will arise. IR sensors may become unreliable and output results may be poor due to environmental influences.

Actions to take

To increase the sensor's coverage radius, it is planned to use ultrasonic sensors, equivalent to the “sound sensors” described above, transmitting data about the distance from you to the object. The ultrasonic range is wider than that of infrared radiation, and it is more reliable in adverse conditions.

Conclusion

The project was a fascinating study of IR sensors. It demonstrates that the results can actually be obtained and used. Many further projects can be developed based on this.

"Radar detector" in analysis. ( Radar detector- a passive receiver of police radar signals, warning the driver about the need to comply with the established speed limit.)

Today we will talk about devices for electronic warfare on our roads.
While anti-radars and radar detectors are not prohibited in our country, we do not conduct electronic warfare, but in some countries the war is on to the fullest. We can only prepare.

Electronic warfare(EW) - variety armed struggle, during which the impact of radio emissions (radio interference) on the radio-electronic means of enemy control, communication and reconnaissance systems is carried out in order to change the quality of military information circulating in them, protect one’s systems from similar influences, as well as change the conditions (properties of the environment) of radio wave propagation. Wikipedia

How to resist someone who is trying to remove information about you without your knowledge and how to protect your “personal data” from unauthorized removal.

Radars, radar detectors, radar detectors detectors. About what types there are, how to make/cut both of them yourself.
(Thanks to the online store fonarimarket.ru for the equipment provided)

Radars

The world's first radar

The world's first automotive radar

Some of the first police radars of the mid-20th century:

blogs.sydneylivingmuseums.com.au/justice/index.php/2011/04/05/a-deterrent-for-scorchers

Radio frequency radar(Doppler radar) emits a high-frequency X-, K- or Ka-band radio signal in the direction of the vehicle. The frequency of the reflected signal changes in proportion to the speed of the object. Having received the reflected signal, the radar measures the frequency deviation and calculates the vehicle speed. The resulting speed value is displayed on the radar display or transmitted to the situation center if the radar is stationary.

Traffic police radar ranges are determined international agreements. Three bands are certified in Russia; the frequencies of all radars used by the traffic police in our country must be within their range.

X-band(operating frequency 10.525 GHz). The first detectors worked in this range, but today they have almost completely given way to equipment using other frequencies, although some foreign and Russian ones (BARRIER, SOKOL) continue to use it.

K-band(carrier frequency 24.150 GHz). Basic for the vast majority of traffic police radars in the world. The devices operating in it are more compact, but have a greater detection range than X-band devices.

L-band(1-2GHz).

Range VG-2(16000 MHz) - a range that some police European countries(where radar detectors are prohibited) uses to detect vehicles with radar detectors.

The promising K a and K u bands have not yet been certified in Russia, and we do not use radar cameras in these ranges. The detectors used by motorists are tuned to the traffic police radar ranges of all frequencies used in our country.

The second type of police radar is laser radar(lidar) or, as it is often called, optical. Lidar emits short pulses laser outside the visual range (IR), with a fixed time interval, in the direction of the car. These pulses are reflected from the vehicle and received by the laser meter. The lidar records changes in the distance to an object based on the delay time of each reflected pulse. A digital lidar device calculates a vehicle's speed using range data over a fixed period of time.

Big Brother's Guns

Radar "Iskra-1"

The Iskra-1 radar is a reliable and efficient speed meter operating in the K-band. For 15 years now, radar has been successfully used by road patrol services to control speed limits on Russian roads. Iskra-1 operates at double the K-band frequency, which significantly increases the reliability of measurements in unfavorable conditions. weather conditions. Distinctive feature models "Iskra-1" is a monopulse method of measuring speed. This mode ensures high performance of the device: the radar calculates vehicle movement parameters in just 0.2 seconds. At the same time, the radar is practically invisible to all foreign-made radar detectors that are not adapted to Russian conditions: they all perceive the Iskra short-pulse signal as interference.

Characteristics
Device type radar


, patrolman (on the move)

Speed ​​measurement range 30-220 km/h

The lineup
Iskra-1V is designed to operate in a stationary mode, predominantly in one direction. Radar allows you to identify a vehicle with highest speed, exceeding the flow speed by only 5 km/h.

Iskra-1D is the first Russian radar capable of operating in all directions in a moving patrol car. In one second, the radar manages to measure its own speed and the target’s speed five times, eliminate possible errors, process the measurement results and display them on a display that sequentially displays the target’s speed, its own speed and the time since the start of the measurement.

Radar "Sokol-M"
Mobile radar "Sokol-M" is an autonomous radar speed meter operating in the outdated X-band. The device is designed to determine the speed of oncoming vehicles only. The large-sized, easy-to-use radar is capable of monitoring the speed of both individual vehicles and those moving in traffic at a distance of 300-500 m. It is perfectly recognized by “white” radar detectors of any price category. The Sokol-M radar was discontinued in 2008, but due to its high reliability, ease of use and relatively low price, it is now very widely used in Russia and the Commonwealth countries.

Characteristics
Device type radar
Speed ​​meter operating frequency 10500-10550 MHz (X-band)
Controlled directions of movement all directions
(in move)

The lineup
"Sokol-M-S" is designed for stationary speed control and has an adjustable range. All Sokol-M models operate in the Ultra-X pulse mode, which makes these radars difficult to detect for radar detectors of the lowest price category and models not adapted for use in Russian conditions.

"Sokol-M-D" is intended for measuring the speed of oncoming and passing Vehicle in a moving patrol car.

"Sokol-Visa" - mobile complex speed measurement and video recording is a Sokol-M radar operating in tandem with a digital video camera. The system operates in stationary mode (installed primarily on a stationary patrol car) and can only measure the speed of oncoming vehicles. The Sokol-Visa complex records on video not only violations of the speed limit, but also driving at red lights and crossing solid lines - it is almost impossible to challenge such an accusation of violating traffic rules.

Radar "Binar"
A special feature of “Binar” is the presence of two video cameras: the first is used for a wide overview of the traffic situation, the second is filming close-up the offender's car with a visible license plate at a distance of up to 200 meters. The device is capable of operating stationary or while a traffic police patrol car is moving. The presence of two video recordings in addition to radar readings simplifies monitoring the situation on the road and increases the reliability of identifying traffic violators. "Binar" is equipped with a non-volatile memory card in SD format, is lightweight, can be charged from the car's on-board power supply and can be synchronized with a computer. The radar is controlled using a remote control or touch screen.

Characteristics

Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of movement all directions
Speed ​​measurement mode: stationary, patrol
Detection range up to 300 m

Measurement error ±2 km/h

Radar "Radis"
The Radis radar has high accuracy And fast speed measurements with the ability to select the closest or fastest car from the traffic stream. The device is capable of measuring speed in both oncoming and downstream directions, is equipped with two displays with bright backlighting and has simple operation using an on-screen menu. The radar is capable of measuring speed by charging from the vehicle's on-board network. The weight of the device is only 450 g. “Radis” can be installed in the passenger compartment, as well as on the hood or roof of a patrol car using a magnetic stand. Using a remote control, the radar can be controlled remotely.

Characteristics
Device type radar
Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of movement all directions
Speed ​​measurement mode: stationary, patrol
Detection range up to 800 m
Speed ​​measurement range 10-300 km/h
Measurement error ±1 km/h

Radar "Berkut"
The Berkut police radar is designed to control the speed of single vehicles or cars in heavy traffic. Has the ability to select the closest or fastest car. The radar is equipped with a backlit indicator and buttons, allowing the traffic police inspector to record the speed of the vehicle in dark time days. "Berkut" can operate for 10 hours without recharging and measure speed both stationary and in patrol mode. The radar is convenient to use and can be easily mounted on dashboard car. Depending on the situation, you can attach a handle, bracket or video clip to the device.

Characteristics
Device type radar
Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of movement all directions
Stationary speed measurement mode
Detection range up to 800 m
Speed ​​measurement range 20-250 km/h
Measurement error ±2 km/h

Radar "Vizir"
While determining the speed, the Vizir radar makes photo and video recordings of the violator’s vehicle, which helps the traffic police inspector in resolving controversial situations. The results of speed measurements, as well as the reference date and time, are entered into the picture taken by the Vizir. The device takes measurements in all directions and is capable of operating both stationary and in a patrol car. The radar has a built-in LCD display and simple menu with convenient location of control keys. The device has an automatic speed measurement and recording function traffic violations. The “visor” can be connected to an external monitor and transfer data to a computer.

Characteristics
Device type radar, video recorder
Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of movement all directions
Speed ​​measurement mode: stationary, patrol
Detection range up to 600 m
Speed ​​measurement range 20-250 km/h
Measurement error ±2 km/h

Radar complex "Strelka"
The Strelka radar complex accurately measures the speed of all vehicles within its coverage area (500 m from the installation site), regardless of the traffic density. The Strelka camera records exceeding the established speed limit at a distance of 350 to 50 m from the installation site and photographs the violator’s car with clearly visible license plates. The received data is processed by a computer and transmitted to the information processing center via a fiber optic line or radio channel.

Characteristics

Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled traffic directions all directions (up to 4 lanes)
Speed ​​measurement mode: stationary, patrol
Detection range up to 500 m
Minimum detection range 50 m
Speed ​​measurement range 20-300 km/h
Measurement error ±1 km/h

The lineup
“Strelka-01-ST” is a stationary device that is installed above the roadway and transmits information to the control center via fiber-optic communication.

“Strelka-01-STR” is a stationary device that is installed above the roadway and transmits information to the control center via radio communication.

"Strelka-01-STM" is a mobile version of the device that can be placed on a patrol car.

Radar complex "Arena"
The Arena hardware and software complex is designed to automatically control the speed limit on a certain section of the road. Preparing the complex for operation takes about 10 minutes. “Arena” is installed on a tripod 3-5 m from the edge of the roadway. Cars that exceed the speed limit are automatically photographed, and data on violations is transmitted to the traffic police post or stored in the device’s memory. The radar complex is powered by a battery located nearby in a special box.

Characteristics
Device type: radar, photo fixator, APK
Speed ​​meter operating frequency 24050-24250 MHz (K-band)

Stationary speed measurement mode
Detection range up to 90 m
Speed ​​measurement range 20-250 km/h
Measurement error ±2 km/h

Photoradar complex "Chris"
The Chris photo radar complex is designed to automatically record traffic violations, recognize vehicle license plates, check them against federal or regional databases, and transmit data to a remote traffic police post. The device is equipped with an infrared camera, which allows it to work at night. “Chris” is installed on a tripod near the edge of the roadway and measures the speed of only those cars that are in the frame.

Characteristics
Device type: radar, photo recorder
Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of movement all directions
Stationary speed measurement mode
Detection range up to 150 m
Speed ​​measurement range 20-250 km/h
Measurement error ±1 km/h

The lineup
"Chris-S" is a standard model of a photoradar complex.

"Chris-P" is an improved model with a new photoradar sensor.

Radar "Rapira-1"
The Rapira-1 radar is used only for stationary measurement of vehicle speed and is capable of operating separately or as part of various hardware and software systems. The radar is installed at a distance of 4-9 meters above the road at an angle of 25° and allows you to determine the speed of the car in a narrow control zone.

Characteristics
Device type: radar, photo recorder
Speed ​​meter operating frequency 24050-24250 MHz (K-band)
Controlled directions of oncoming traffic
Stationary speed measurement mode
Detection range up to 20 m
Speed ​​measurement range 20-250km/h
Measurement error ±2 km/h

Laser radar "Lisd-2"
The Lisd-2 laser radar is designed to measure the speed and range of various objects; it uses narrowly directed light radiation to highlight a specific vehicle in a dense stream of vehicles. The lidar is designed in the form of binoculars with optical sight, works only stationary, but measures speed in all directions. There is a shoulder strap and the ability to mount the device on a tripod.

Characteristics


Controlled directions of movement all directions
Stationary speed measurement mode
Detection range up to 400 m
Speed ​​measurement range 1-200 km/h
Measurement error ±2 km/h
The lineup
"Lisd-2M" is a standard lidar model.
"Lisd-2F" is an improved model, equipped with a photo recording unit.

Laser radar "Amata"
The Amata laser radar is capable of accurately measuring the speed and distance of vehicles and recording traffic violations using photos or videos. The device operates on the basis of a laser speed meter, which allows you to reliably identify the car the traffic police inspector needs from a dense traffic stream. The Amata lidar is equipped with a target mark, which on the device display or in a photograph coincides with the direction of the laser beam and is proof of measuring the speed of a particular vehicle.

Characteristics
Device type lidar, photo recorder
Laser wavelength 800-1100 nm
Controlled directions of movement all directions
Speed ​​measurement mode: stationary, patrol
Detection range up to 700 m
Speed ​​measurement range 1.5-280 km/h
Measurement error ±2 km/h

Radar detector

Legality
The use of radar detectors is officially permitted in Russia, Ukraine, Belarus, Moldova, Kazakhstan and all other countries of the commonwealth, in the USA (except Virginia and Washington, DC), Great Britain, Iceland, Bulgaria, Romania, Slovenia, Albania, Israel, Japan, India, Pakistan, Taiwan, New Zealand.

Radar detectors are prohibited for use in Canada (except the states of British Columbia, Alberta and Saskatchewan), Brazil, Finland, Norway, Sweden, Belgium, Ireland, Switzerland, Denmark, Germany, Austria, Holland, Luxembourg, France, Spain, Portugal, Italy , Greece, Croatia, Serbia, Slovakia, Poland, Hungary, Bosnia, Czech Republic, Estonia, Latvia, Lithuania, Turkey, Jordan, Singapore, Malaysia, Egypt, Saudi Arabia, UAE, South Africa, Australia (except for the state of Western Australia).

Story


The world's first radar detector for motorists

Such gadgets were promoted through the magazine Popular Electronics (1961):

Later models:

Radar Detector Museum - www.radardetectormuseum.com

The insides of the modern radar detector SHO-ME 520 STR


Bottom view

With the radiator removed (corrected in the comments - this is an RF shield. It is this that screens the local oscillator radiation, and also protects the receiving path from external interference. Thank you). At the top left is a laser detector, below is a copper horn antenna. In the center is the HF module. To the right are 3 control buttons. Right (white) - display

Under the HF shield

detailed description of components on a similar device

False signals are radio signals from foreign devices operating in the ranges of police radars, but having nothing to do with the latter. For example, automatic store doors can operate in the X- and K-bands, signals from satellite equipment can be detected by a radar detector in the X-band, and in areas adjacent to airports radio signals of all ranges, as well as laser signals, can be detected.

Radar detectors use software and hardware methods to protect against false radio signals. Hardware methods involve the installation of specialized filters in the receiving device of the radar detector, and software methods include special algorithms that can identify the radar signal and cut off its signal from interference. But sometimes these methods are not enough, especially when using a radar detector in urban environments with big amount interference from foreign devices. To do this, all modern radar detectors provide a manual change in the sensitivity of the device - switching between the “City” and “Highway” modes. Depending on the “interference” situation, the driver can independently adjust the sensitivity of his device and minimize the number of false alarms of the radar detector.

Active radar detectors

The radar detector is an active type device. It is equipped not only with a radio receiver to detect the signal, but also with a radio transmitter that emits an interference signal. It is this signal that disrupts the operation of police radars: it mixes the signal coming from the radar with radio noise (“white noise”). The radar receiver receives a distorted signal and cannot determine the speed of the vehicle to which the radio signal was sent.

These devices are prohibited almost everywhere. This device is included in the list of devices included in the Law “On Countering Traffic Authorities”.

Old School Police Radar Hack

Having found his grandfather's radar in the attic, the craftsman tinkered with the oscilloscope and soldered an adapter from the radar to the laptop via the audio input. And then I successfully processed the signal on the computer.

P.S.

Bearded story

Two California Highway Patrol officers were sitting in a radar ambush on I-15, just north of Marine Air Station Miramar.
One of them set out to measure the speed of the cars driving up the hill that was right in front of them.
Suddenly... the radar began to show 500 km/h.
The policeman tried to reset the radar program, but the program refused to reset, and then the radar itself turned off.
Then a deafening roar emanating from somewhere in the treetops made it clear that the radar was tracking a Marine F/A-18 Hornet (manufactured by Northrop-Grumman), which was performing a low-flying exercise nearby.

The captain of the police department filed a complaint with the Marine base commander.
The answer that came was in true Marine style:

“Thank you for your letter. We can finally close the file on this incident. You may be interested in the fact that the Hornet's tactical computer detected the presence and began tracking your enemy radar, which is why it sent a response jamming signal, causing your radar to turn off.
Further, the Air-to-Surface missile, which is part of the ammunition of the fully armed aircraft at that time, also automatically targeted the location of your equipment.
Luckily the pilot Marine Corps, who controlled the Hornet, correctly assessed the situation, and quickly responded to the alarm status that arose missile system, was able to intercept control of the automatic defense system before the missile was fired to destroy the enemy radar location.

The pilot also suggests that you keep your mouth closed when you swear at him, as the video system on this type of aircraft is quite high-tech. Sergeant Johnson, the policeman holding the radar, needs to consult his dentist about his left back molar. It looks like the seal in it is loose.
In addition, the clasp on his holster is broken.

Thank you for your concern.

Semper Fi"

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• radar detector
• direction finder
• electronic warfare

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You can find hundreds, maybe even thousands of different radar detectors on the market, but not all of them are created equal. What is the difference between a radar for 1000 rubles (for example from aliexpress) and a device for 10-15 thousand rubles? The price is naturally justified not by the marketing “tricks” of the manufacturers, and today we will tell you what is inside modern radar detectors and how to choose the one that will not upset you while on the road.

Let's start, perhaps, with the very basics. What is a radar detector? Radar is a passive receiver of the radio signal emitted by police speed cameras. I want to say right away that in this article we will analyze the design of passive radar detectors, and not radar detectors (a radar detector is an active noise emitter that makes it impossible to measure the speed of a car).

• Radar detectors with active horn
• Radar detectors with active horn and GPS
• GPS radars
• Signature radar detectors (technically, they can be classified as ordinary radars, but in practice this is completely new type devices).

The first group is, one might say, where it all began. The simplest and most understandable type of device. From the name it is clear that apart from a horn and prosthetic electronics, you will not find anything in these devices.

It looks something like this

At the front there is a horn antenna that turns into a radio unit, next to it you can see a unit for receiving laser signals. Of course, we won’t talk about the scattering of transistors and the microcircuits themselves. All you need to pay attention to is the horn, the laser receiver and of course the processor itself. It is worth understanding that all old radar detectors and modern devices up to 3000 rubles are built according to the same principle; we are of course interested in the latter. What is the disadvantage of this design? And the fact is that the manufacturer is trying to save on almost everything. Pay attention to the antenna itself.

On the left you see the horn of a modern radar detector, and on the right an outdated one. I think the difference is visible even to an inexperienced user. And it seems to me that there is no need to tell which radar detector is more noise-resistant.

But you should understand that ordinary radar detectors without GPS are outdated technology and at the moment you should not pay attention to them, since there are cameras that cannot be detected by radio signal (for example, AVTODORIA).

Radar detectors with an active horn and GPS are more modern type radars, but even here there are devices that you should not pay attention to. The principles of selection are approximately the same. It is worth buying radar detectors with the most efficient radar part and a modern processor. How to choose a truly effective radar you ask? This is why we are writing this article.

For now best offer In terms of price-quality ratio, devices from Playme can be called. All radar detectors of the brand are assembled at a Korean factory, and this really plays a big role (since Korean radars can be called the accepted quality standard). For comparison, this is what the radar part of a Chinese radar looks like

It’s not worth talking about circuitry. The board contains inexpensive transistors, the soldering quality leaves much to be desired, and the radar part itself is almost 2 times smaller (2 times smaller than that of the same PlaymeHARD)

It is also worth noting that at the moment, Korean radar is not synonymous with high cost. In this example we used 2 devices. Korean Playme HARD and Chinese Omni RS-500. At the moment, HARD costs 5390, and the Chinese device costs 7250.

Why is there such a difference you ask? Why is a Korean radar detector cheaper? Yes, because with Playme radar detectors you do not overpay for unnecessary functions and marketing, which is very rare in modern devices. As an example, let's look at the Neoline X-COP 5700 (which costs about 10,000 at the time of writing this review). If we talk about the circuitry of the device, then you won’t find anything special here. The device performed average in almost all tests. The only thing functional difference The neoline is that the manufacturer has attached to a regular radar, which should cost no more than 5,000 rubles, the Motion Control function (turning off the sound warning with a wave of the hand) - this is what we call overpayment for marketing.

GPS radars are an outdated type of radar. At the moment there are practically no such devices. This is not surprising, since almost every second DVR has a GPS database of posts, radars and cameras, and almost every radar has a GPS module. We have already told you why you need GPS; whether you should buy a device without a radar frequency is up to you to decide. At a fairly high price, GPS radars are inferior in functionality to conventional ones and have only one advantage - their size.

Signature radar detectors - as already mentioned, technically this is a regular radar. The only difference is a super powerful processor that allows the device to analyze any incoming signals in a split second. For those who don’t know, signature radars are those that are able to recognize a speed camera by its “signature.” At the moment, only Playme devices can boast of truly working signature radars, which at the same time cost absolutely adequate money.

To summarize, I would like to say that this article serves as a kind of educational program for choosing radar detectors. Naturally, not a single online store will allow you to disassemble the radar before purchasing and make sure that everything is really so. I would like to express special gratitude to the engineers of the Playme company, who did not shy away from this article (like most of the manufacturers we contacted) and provided us with their devices so that we could disassemble them and show you what is inside the most modern radars.

RADAR ANTI-RADAR CIRCUIT

Probably every driver has at least once thought about gettingradar detector, especially after another traffic police racket on the road. Let's get to work! But let's be clear right away:radar detector is a suppressive devicepolice radar, and assembling it is a very difficult task. Here we will look at more simple diagram radar detector - the so-calledradar - a detector that signals an inspector scanning your car.

To measure the speed of a car, the traffic police radar receives radiation reflected from the car, and the radar detector receives direct radiation, so the radar detector is always able to detect the radar earlier in time than it measures the speed of the car! So, if a traffic cop scans from his radar 500 m from the car, this is the range of the Visir device, then before the car approaches a visible distance of 100 m, you have the opportunity to slow down.

This radar detector circuit is quite common on the Internet, and although I personally did not assemble it, I had to repair such a homemade device. There the microwave diode - detector stood in a small funnel made of tin and the entire structure fit into a housing soldered from foil PCB, the size of a pack of cigarettes. During microwave irradiation it blinked and beeped. Here is another version of the radar detector circuit from the magazine Radio:

All radars used by the traffic police operate with frequencies of 10525 MHz, 24150 MHz and 34700 MHz. These radar detectors are capable of detecting them all.

Settings radar detector circuitscan be performed while standing close to the person with the radar;

Or, so as not to light up, near a stationary radar camera:

Sometimes they are placed a couple of kilometers in front of the traffic police post:

IN Lately, the authorities adopted: Radar video recording speed meter VIZIR, consists of two independent blocks - a speed meter and a digital photo and video camera. The camera turns on both automatically when a driving car exceeds a pre-set speed limit, and manually - by a traffic inspector. Outdoor surveillance cameras with built-in radar. The device operates constantly, and if the speed is exceeded, a sensor is activated that activates the camera.