shsn
Junior Member level 3
I've done some readings on how tachometers (as in automobile tachometers used to measure engine RPM) works. Apparently modern tachometers drive the needle from the signal received from its signal wire; which is a series of square wave pulses. If I'm not mistaken the frequency determines what RPM the engine is running. So as a holiday project I want to build a circuit/design that uses PIC (USB-compatible so it can be connected to a computer) to operate a tachometer.
It seems the best way to get started is using 555 timer to generate the required square wave signal. But I do not know how to 'vary' the frequency of 555 timer using a PIC, is this even possible? or can a specific model of PIC can do all these all in one?
Regards.
It seems the best way to get started is using 555 timer to generate the required square wave signal. But I do not know how to 'vary' the frequency of 555 timer using a PIC, is this even possible? or can a specific model of PIC can do all these all in one?
Regards.