POWERED BY 2 "CR123" BATTERIES3 Functions with "Quick Click" accessMomentary-Full Power-Power SaveIn developing the MAG-TAC LED flashlight, we aimed to produce an advanced lighting ...

This sleek, magnet-powered light puts traditional desk lamps to shame Get it on sale for a limited time. By StackCommerce on July 24, 2020 ...

Once implanted and activated, the Northstar device can backlight existing tattoos or mimic bioluminescence. When a magnet is placed on the device, its five LED lights start to blink.

An IR LED on the ceiling and a phototransistor on the floor of the box work together to detect the presence of mail. [Bob]’s homebrew mailbox has a false back that hides a PIC 16F1825.