The circuit of AVR In-System-Programmer (ISP) has been modified to function with USB connection to a PC. The modification of the old AVR ISP includes the replacement of two transistors which will be ...

[Daumemo] likes experimenting with DIY electronics, and like many people, eventually ran across an AVR microcontroller with a Unified Program and Debug Interface (UPDI). One option is of course to ...

Mass production is a wonderful thing. Prices fall, and hobby hackers get cheap gear. The mind then wanders towards what can be done with it. So it’s little wonder that someone like [Aaron Christophel] ...