Get close enough to this raven and you’ll set off the PIR sensor ... blinking red eyes, general cawing, and of course, thunder. The light comes from a whopping 10-watt, 12-volt power LED.

The code is an Arduino project for the Digispark Attiny85 to turn on a light source when the PIR sensor detects something ... Because an on-board “user” LED is wired to P1 of Digispark by default, you ...

Present consists of just a PIR sensor and Arduino in a 3D printed enclosure to snap onto your monitor. When the PIR sensor no longer detects someone in range, it sends a notification over serial ...