Components Aftermarket tachometer Arduino - 1 pcs TIP-120 Darlington Transistor - 1 pcs 2.2Kohm resistor - 1 pcs Wires 12V diode (~1W) - 1 pcs 12V Power supply - 1 pcs - My own tach consumption was ...

Arduino based circuit for testing PC fans. General purpose circuitry to demonstrate programming and engineering concepts. This sketch controls circuitry to test PC fans in a learning environment. The ...

Posted in Arduino Hacks, clock hacks Tagged arduino, clock, digital gauges, ds1307, rtc, tachometer ← Inventors Chasing Their Dreams; What It’s Like To Quit Your Job And Hack ...

A tachometer used to be an accessory added to the dash of only the sportiest of cars, but now they’re pretty much standard equipment on everything from sleek coupes to the family truckster. I… ...