If your daily driver was born without a tach, fear not – a simple Arduino tachometer is well within your reach. The tach-less vehicle in question is [deepsyx]’s Opel Astra, which from the ...

Instead, he drew up a simple schematic that used an Arduino Nano, an FM radio module based on the TEA5767, and an audio amplifier based on the LM386. A single button on the Arduino helps cycle ...