The negative should go to the ground or a chassis ground depending on the test you are doing. The sensor and/or harness should be disconnected from the circuit so you are not measuring resistance in ...

Arduino_speed_sensor Made a speed sensor for my bike :) If you bike indoors, the classic GPS tracker doesn't work to tell you distance. So you can buy something called a speed sensor that will tell ...

Have you changed your tire size or final-drive gear? You just made your speedo and odometer inaccurate. Here's how to fix them both.