[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 ‘viral’ ...

There are a few different ways of getting firmware onto one of AVR’s ATtiny85 microcontrollers, including bootloaders that allow for firmware to be updated without the need to plug the chip into a ...

The Digispark Attiny85 uses the Micronucleus bootloader, which requires specific Windows drivers (libusb-win32) to upload payloads. These drivers allow Windows to detect the Digispark as a bootloader ...

The goal of this project is to provide a safe bootloader that fits within about ~1 KB of flash for the ATtiny88 (and presumably ATtiny48) chips. It was originally designed for the keyboard.io project.