Similarly, the photoresistor (LDR) is the finish line sensor ... You must employ an appropriate battery pack to run your simple sports timer. The Arduino setup runs on external 9VDC, but something ...

[Scott-28] recently sent in a particularly well-documented project that turned an antique rotary phone into a digital kitchen timer using an internal Arduino ... seven-segment LED display to ...

Until now. [ZHut] managed to bring these two worlds together by presenting how to make an Arduino blink an LED in conjunction with a 555 timer. We know, we know. It is hard to decide how to ...