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

An Automatic Plant watering system is a device (or setup) that uses sensors to monitor the soil moisture and if the moisture ...

Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, and it is also very simple to build. All you need are a few basic parts, ...

You could put the Arduino in deep sleep, if you wanted to and that LED will still blink. With a little work, you could probably adapt this idea to any number of circuits out of the 555 playbook ...

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