Maybe that’s why he emphasizes the new pinouts of the ATtiny102 parts. In particular, the GND pin is where the VCC pin is located on other ATtiny chips(!). It pays to read the datasheets.

[Jenna] sent in a very cool bootloader she thought people might like. It’s called Micronucleus and it turns the lowly ATtiny 85 into a chip with a USB interface capable of being upgraded via a ...