Normally, non-contact tachometers are optically coupled ... You’ll need to know a little about your tooling to get the right RPM, and obviously you’ll be limited by the audio frequency ...

This tutorial will guide you through the process of building a tachometer around an Arduino. Tachometers are used to measure rotation rate in Revolutions Per Minute (RPM). You don’t need much in ...

Sports mode has tachometer (Sports mode has a higher rev limit - 6500 or so) so if you want, you have to switch to Sports mode to see Engine RPM* Eco mode also has a tachometer BUT Renault says it ...