The heart of this project is the STCS1 from STM Electronics:
Warning: Some parts of this project were designed and fabbed using professional software and hardware. However, all aspects of this design could be done using open source products or some perf board and wire wrap.
Step 1: Read the Data Sheet!
From this we can easily see some of the key features of this chip:
■ Up to 40 V input voltage
■ Less than 0.5 V voltage overhead
■ Up to 1.5 A output current
■ PWM dimming pin
■ Shutdown pin
■ LED disconnection diagnostic
Step 2: What Else Do We Need? How Bout 5V@20mA
Step 3: Layout the PCB!
Step 4: Wired Up!
Here are the Gerber Files of this board.
Step 5: Order and Assemble the Board
Step 6: Let the Blinding Begin!
The performance of this chip is pretty amazing. At 1500 mA the driver board is barely warm to the touch when driving leds continuously.
Note: This design is for a strobe light where the leds do not stay on very long. For continuously running the leds you MUST mount them to a heatsink to dissipate the heat that is produced.
All parts for this design can be found at Mouser or Digikey:
Here's the BOM
Driver IC - STCS1