Serial.print("010C\r"); // Send the "01 0C" command to the OBD-II adapter // Wait for a response from the OBD-II adapter delay(100); // Wait for 100 milliseconds to allow the OBD-II adapter to respond ...

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 ...

This project brings your car's engine to life with a real-time RPM display on a 7-segment display using an Arduino Uno and a SparkFun UART board. Take it for a spin and see your engine roar to life ...

Measuring the speed of a rotating object is a common requirement. Knowing the speed of table and ceiling fans, as well as kitchen appliances such as mixers and grinders, can often be useful. However, ...

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. If your ...

A tachometer measures the rotation speed of motors and other machinery. There are various types of tachometers. Described here is a digital non-contact type tachometer using a proximity sensor. The ...

Here’s a non-invasive, all electronic add-on to display the running speed (rpm) of your lathe or milling machine, be it CNC or vintage. It’s state of the art—witness the use of an Arduino Micro board ...