The parts arrived for the RPM meter that uses an Arduino and reciprocal counting to get a three-times-a-second update rate with 1rpm resolution. Arduinos ...

Eschewing the traditional analog meter display or even a digital readout, [deepsyx] opted to indicate shift points with four LEDs mounted to a scrap of old credit card.

Continue reading “Quick Arduino Hack Lets Tach-less Car Display Shift Points”→ Posted in Arduino Hacks, Transportation Hacks Tagged arduino, rpm, serial, shift point, tachometer ...