Disclaimer: The Digispark name belongs to Digistump LLC. I am not affiliated with them in any way. BTW: Check out some great hardware at http://www.digistump.com/. Buy something and support Open Hardware.

This is a simple homemade build of the Digispark hardware design. It is not a perfect duplicate, but does keep the basic functionality of the commercial hardware. Besides being built with a single-sided, non-plated through hole PCB, there are some major differences to note:

 1. Power Supply
    This implementation provides much less power than the Digispark.
    
 2. Female Headers
    The headers do not implement the Digispark footprint.
    
 3. USB Connector
    This design uses an actual connector instead of the PCB.

The rest of the differences and changes are the result of what parts I could get and what skills I have for building such things.