Vermes
Advanced Member level 4
This counter was designed for URSUS C330 tractor. Described solution is a system, which allows you to count rotation and operating hours. In addition, there is a possibility to measure voltage of the accumulator. Real-time clock and stopwatch are applied. Counting the rotation of the motor is made using a hallotron sensor placed on the alternator.
The front part of the device is showed in the picture below. The clock was initially soldered on the base board, but it moved while shaking, so it should be mounted in another way, the best idea is to use tape. The whole is placed on a PCB, which is designed so it can be used to different devices.
The program was written in Bascom. Microprocessor in presented rotation and operating hours counter is Atmega8.
The measurement of rotation is a normal measure of the frequency (pulse counter) converted to r/min. It can be for example that 10Hz is 600 r/min. This is how it is, when one rotation is a pulse. Using e.g. 2 magnets, rotations should be divided by 2, etc.
The whole fits Z4A housing.
Link to original thread (useful attachment) – Mikroprocesorowy licznik obrotów i motogodzin w ciągniku.