Arduino used to measure fan RPM with radio-shack 276-0142 ir detector pair. Uses the Timer1 library to get an interrupt every second which measures a counter incremented by another interrupt on pin2. Pin2 goes out to the collector of the phototransistor which is using a 100kohm load resistor and a 5v vcc.
Site is: my _dot_ grumpykitty _dot_ com
doomlaut 10 months ago
Hi @axel1973w - it took some trawling, but I have found some of my original documentation and posted it on my website. Strangely I cannot post the link here, but it is in my profile.
If you find it at all useful, please like/tweet/bookmark/subscribe me :)
Thanks!
doomlaut 10 months ago
schematic and code example somewhere to study?
axel1973w 11 months ago