[Tim]’s Dice10 is an exercise in minimalism. Building an electronic dice using an ATtiny10 with code that fits within 1kB is not too difficult. Charlieplexing the LED’s would have used three of the ...

The 3-pin HV9921/22 switch-mode LED driver ICs operate from 20 to 450 Vdc, which allow for universal ac input range from 85 to 265 Vac. The parts allow efficient operation of LED strings from voltage ...

Microcontroller port pins can typically be driven either high or low, or else be put into an "input" or high-impedance state. This circuit uses the three states to drive two separate LEDs with one ...

LED applications are booming: backlighting for LCD TVs, projectors, and computer displays, camera flashes, and vehicle brake lights and taillights are just a few. All require constant-current LED ...

There is usually a pin-out on the SCSI controller. Just connect the IDE HDD LED and enjoy. If you are already using this LED for another IDE device, go buy a new one and drill a hole in the case to ...