Home made USBTinyISP programmer

The truth is that not all hobbyists are willing to pay full price for programmers. Sometimes it is a dilemma pay like $50 for tool or purchase parts for next project. Either way there is always a way out. If you don’t want to spend extra on tools, then start making them. Of course it takes some time, but saves your pocket. Of course, with DIY tools, you might be missing some functionality or safety, but if it works then great. TSJWang decided to build really cheap AVR ISP programmer which he claims is about $5. He uses Attiny45 microcontroller where VUSB library takes care of sooth USB operation. He developed home made PCB, then set up avrdude to accept programming commands. As with all DIY programmers – use it at your own risk. Continue reading

AVR programmer is small as finger tip

small vusbisp programmer

I don’t know if very tiny tools like programmer adapters are very handy to use, but it is always fun to watch how tiny they can get. Philip took a vusbtiny programmer and squeeze it in to smallest PCB he could make. So, he made USB connector directly on PCB by tracing pads on it. But to be sure, on other side he made footprint for Mini USB socket. If one fails there is a way out. Of course all parts are SMD except the 6-pin ISP connector. The board size come to be 12mm x 28mm and I think, there still is a space to squeeze a bit by making ISP header smaller (use 1mm instead of 2.54mm) or choosing smaller passives instead of 0805. But would such tool be normally useable? Continue reading