In the microcontroller era today, Arduino ... light level is below a threshold value. Here an LDR (Light Dependent Resistor) is used to measure the light level. The alarm system is triggered when a ...

Get close enough to this raven and you’ll set off the PIR sensor ... The light comes from a whopping 10-watt, 12-volt power LED. This bird’s brain is an Arduino Nano, which is protected ...

The code is an Arduino project for the Digispark Attiny85 to turn on a light source when the PIR sensor detects something. Note that after powering the PIR sensor module, it needs about 10 to 60 ...

The Raspberry Pi is a credit card-sized computer capable of running full-fledged Linux distributions such as Raspberry Pi OS, ...

A year ago [Lochie] bought an Airwick automatic air freshener ... and noticed that a perfectly good PIR sensor was looking him in the face all this time. He disassembled the air freshener ...