Wardy writes:
Why buy a tacho when you can build one? I thought it would be a cool project and there happens to be a convenient spot on top of the machine for a tacho to live. I fired up my pen and paper and wrote some code to do the requisite calculations. Then threw a board together and did a bit more code to drive a 4 digit LED display. Actually this is a fair amount of coding to do but it’s a lot of fun to do some serious coding in PASM.
To bring this blog up to date for once (!!!), today I managed to motivate myself to get this build into a state where the RPM sensing and display code is fully operational and made a quick video of it…