Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, ...

These devices have key drawbacks. Water level indicators require manual pump operation and often waste power as multiple LEDs ...

Fastest finger first indicators (FFFIs) bring precision to quiz games, measuring contestants’ reaction times with accuracy.

the idea is that he can still use the Arduino to reprogram the NVRAM chip when he wants to play around with the sound. We’ve covered some pretty fancy circuit bent instruments here in the past ...