Frequency input issue for tachometer

Using Arduino Sensors
10

M4vrick:
Everything is good now !

Just with the RC network before the darlington, no more bad ready, the frequency measure is steady :smiley:

I need to improve the speed now, my tachometer has a refresh rate of 1sample/second, it's really too slow :sweat_smile:

Thank you for your help :slight_smile:

I'm glad it works.

One of the difficult decisions with a digital tachometer is what to use for an update speed. I prefer an analog tachometer for that reason. You could consider using a digital bar graph or if possible a sort of "pie chart" to simulate the good things about an analog readout. Keep the digital for "cruising".