Messing around with Arduino can lead to some fun projects ... or is complex enough to otherwise require more precise voltage control. Too little and things probably won't work right, if at ...

This is a hotel room door swinging open. The device he holds in his hand is an Arduino connected to the OUTSIDE portion of the door lock. It takes approximately 200 milliseconds from the time an ...

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

[Reza’s] methodical investigation of this remote controlled outlet let him patch in with an Arduino using a 433 MHz transmitter. This is a single-device unit, but the techniques used here should ...