[Ivan’s] friend built a proximity sensor to switch his LED bench lighting ... The mains are switched with a relay using an NPN transistor to protect the chip’s I/O pins. Check out the video ...

You can directly connect a low-current 5V electromagnetic relay or piezo-sounder at its output as depicted in the below wiring diagram ... When the infrared proximity sensor (E18-D80NK) senses an ...

Position Sensors play an important role in our daily lives. A position sensor, as the name indicates, provides feedback on the position of the measurand by detecting the presence/absence of an object ...