A speedometer is an automotive device used to measure the speed of a vehicle. You can install both a purchased speedometer and a hand-made device.
It is necessary
- - personal computer with Internet access;
- - details;
- - soldering iron;
- - fee;
- - tester;
- - speed sensor;
- - compiler.
Instructions
Step 1
Develop or download on the Internet a scheme for constructing an electronic speedometer. By the way, the second method is more convenient, since you will not need to sit over a mountain of literature and look for the necessary information to draw up an electronic speedometer diagram.
Step 2
Purchase the parts you need to create an electronic speedometer. Depending on the complexity of the circuit, you may need the following components: phytodiodes, transistors, display, resonator, capacitors, voltage regulators, relays, and other parts. You can buy all this in an electronics store or on the radio market.
Step 3
Assemble the electronic speedometer circuit. After the soldering process is completed, use a tester to check the quality of the connection of all soldered parts.
Step 4
Purchase a speed sensor and install this controller on a vehicle wheel. But first, calculate the number of pulses per kilometer run: for this, measure the circumference of the wheel (one revolution - one sensor pulse). Based on these data, calculate the parameter of the device.
Step 5
Use a special compiler to flash the microcontroller. Immediately test the operation of the electronic speedometer, and only then connect the device to your vehicle.
Step 6
Install the electronic speedometer and test it in practice. If you suddenly find problems in the operation of the device, reprogram the microcontroller or change its circuit.
