Tucson_Tom
(Tucson Tom)
4
I use the USBasp — you can buy it for about $5 on Ebay or even cheaper on AliExpress. You can even buy them on Amazon. I found that I had to install the slow SCK jumper before it would talk to ATTINY13 chips though. At that price, I bought several, which allowed me to use one to update the firmware on another, which was nice, though not entirely essential. I bought two on Ebay, and two from China. One of the four was DOA, so I was glad to buy several, and at that price and with long shipping times from Asia, it only makes sense.