9 Watt LED Desk Lamp
A desk Lamp was realized with a 9w LED module, a salvaged Pentium slot heatsink and an AtMega 8. Two switch mode supplies were used, one to provide 5v for the AVR and the other in constant current mode to supply the LED .
The Lamp has 3 modes of operation, off, on and ambient light sense mode.
The AVR senses the temperature of the heatsink to control the fan speed.
1) Schematic 2) Board 3) Bottom of Lamp 4) Top of Lamp 5) Enlightened Lamp