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- Thu Jun 25, 2020 5:26 pm
- Forum: ESP32 Arduino
- Topic: PWM controlled fan tacho wrong
- Replies: 21
- Views: 5491
I got the best results with: fan tacho out - pullup resistor 10k to 3.3V - series resistor 3.3k - capacitor 100 pF to gnd - esp32 input pin It works successfully with a noctua fan (max 1500 rpm) and a cpu fan (max 2400 rpm). Jelly32 - Do you have a drawing of this? Even a quick sketch. I'm happened...