The sensor sends “hit” signals to a small Arduino Uno via a PC817 optocoupler. The headcount is then displayed on a small LCD screen positioned above the speed bag, allowing you to keep track ...

For example, I used the output signal of the proximity sensor to trigger my old wireless doorbell thru an optocoupler after modding the cordless bell push switch circuitry (which will possibly put in ...

These little Arduino boards are a real boon to amateur electronics tinkerers: cheap, versatile, and very small. This guy had the idea to make a high-speed ...

Why not create your very own high speed camera trigger using a Arduino, piezoelectric sensor (as a sound sensor), a DSLR camera and an external flash.

The FOD0721, FOD0720 and FOD0710 are logic gate optocouplers that isolate the logic control circuitry from the transceiver at the bus interface level. Since industrial systems are susceptible to noise ...