How to modify an AVRISP mkII to provide 5V power to target board

The AVRISP mkII is a great USB In-system programmer for Atmel AVR microcontrollers. However, one feature is missing: the ability to power the device you want to program. With this modification you'll no longer need a separate power source in order to program!

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• AVRISP mkII usb programmer
• soldering iron
• solder
• 22 awg wire
• toggle switch
• Drill + drill bit

1. Open the case by pushing on the tabs on the corners on the bottom.

2. 
    

   Here is where we pull +5V from - the solder point of the internal LED closest to the edge of the board. Solder a piece of wire to this point.

3. 
    

   Here is the pin that connects to +5V on the ISP header. Solder a piece of wire to this point.

4. Connect the two wires with an on/off switch.

5. Drill a hole in the case for the switch and mount the switch. I used a 1/4" drill bit and drilled the circle mark on the top half from the injection molding process.

6. 
    

   Reassemble the programmer and you're done!

Tips & Warnings

• You can use any kind of switch as long as its on/off (not momentary!) and you can fit it in the case.
• This modification is done at your own risk and will probably void your warranty!
• This is only for low current target boards - the USB port can only source 500mA max. Do not overload your usb port! Most ports are protected, but damage may occur if it is not!