The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close proximity sensor. As you can ...

When everything’s plugged in, this is how your Arduino, motion sensor ... clear plastic can interfere with infrared light. You can just leave the power relay on top of the enclosure, ready ...

is “a single-pixel infrared camera that picks up everything in a 90° cone starting at the sensor.” [MakeFunStuff] paired this easy-to-use sensor with an Arduino Nano and five LEDs that show ...

An Arduino measures the temperature of the room via a DS18B20 temperature sensor which then has the ... and turning the unit on/off via a relay connected to the 120vac line would work just ...