Deception of a regular odometer (electronic speedometer) of a car. Free Technical Library article

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Deception of a regular odometer (electronic speedometer) of a car

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Encyclopedia of radio electronics and electrical engineering / Automobile. Electronic devices

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We turn on the power, the device goes into normal mode, the output duplicates the input frequency. Press the button, hold for about 5 seconds, the LED blinks, release the button, the device goes into the 1st mode.

1 mode:
The device turns off the input, the output begins to increase the frequency. We press the button, the device goes into the 2nd mode.

2 mode:
The device stops increasing the frequency and stops. The frequency remains. We press the button, the device goes into the 3rd mode.

3 mode:
The device turns off the output (0 Hz). Those. the car is moving, the speedometer does not count. Press the button, the device goes into normal operation.

In any mode (1-3), the LED blinks 1 time per second, indicating that the device is working.

Deception of a regular odometer (electronic speedometer) of a car. Scheme of the odometer snag

Download device project and HEX firmware for Proteus: download (23 KB)

Author: Alexey Klyushnikov, Ivanovo, al.kl [dog] mail.ru; Publication: cxem.net

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