You will need
  • - personal computer with Internet access;
  • details;
  • - soldering iron;
  • Plata;
  • tester;
  • - speed sensor;
  • compiler.
Instruction
1
Independently develop, or download in Internet the scheme of constructing the electronic speedometer. By the way, the second method is more convenient because they do not need to sit over a mountain of literature and to seek out the necessary information to map the electronic speedometer.
2
Acquire the necessary to create electronic speedometer details. Depending on the complexity of the scheme you may need the following components: photodiode, transistors, display, resonator, capacitors, voltage regulators, relays and other parts. To acquire all this at an electronics store or on the radio.
3
Assemble a circuit of the electronic speedometer. After the soldering process is completed, with a tester check the connection quality of all soldered parts.
4
Purchase the speed sensor and install the controller on the wheel of the motor vehicle. But first calculate the number of pulses per kilometer: for this measure the wheel circumference (one turn – one pulse sensor). Based on these data, calculate the device parameter.
5
Using a special compiler to run the microcontroller firmware. Immediately test the electronic speedometer, and only after that connect the device to your motor vehicle.
6
Assemble electronic speedometer and practice its performance. If you find problems in the operation of the device, reprogram the microcontroller or change his scheme.