This board/project is all about a compact board packed with an ATTiny microcontroller driving an LM3405 power LED driver. The Tiny is constantly monitoring an on-board motion sensor and can activate the LED driver when motion is detected.
I initially designed this to be part of an under-cabinet, motion-sensor-activated LED lighting system...While preparing food in the kitchen, the sensor sees your hands moving and keeps the counter lit up. When finishing in the kitchen, just walk away and the lights turn off a few minutes later. No wasted energy and hands-free operation. We've become addicted to this kitchen light, and this circuit could also be put to many other cool uses from security to ambient/decorative lighting.
Power LED's are a lot of fun to play with but they require some sort of drive/regulation. The LM3405 is a great little chip to control power LED's, and this board gives some great control options in a compact package that can be tucked into a tight ar
Here's a shot of a custom strip that I made for a fellow member of the Texas Maker's Guild to aide when he's demonstrating his aquaponics setup. The firmware is written so that it's just alway's on, there's no motion sensor or button installed. 3D-printed end caps double as braces to start it up off the tank a little bit.