It might seem like we’re on a vehicle hacking kick this weekend, but [Rex] built an excellent custom digital tach for his race car. It uses the classic seven segment displays, a PICAXE ...

Eschewing the traditional analog meter display or even a digital readout ... display and have a more recent vintage car, this sweeping LED tachometer might suit you more.

The Normal mode (what comes on when the car is switched on) DOESN'T have a tachometer (they think only speedometer is required, so the 3/4 circle display AND the digital display BOTH show vehicle ...