How to Install an ATtiny Bootloader With Virtual USB

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Contributors: Shawn Hymel
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Resources and Going Further

While this is a lot of information to take in, it shows how to hack the Arduino IDE to load custom board definitions. These steps should work for other ATtiny devices that are supported by the micronucleus project, such as:

You might have to modify the pins_arduino.h file, however, if you plan to use a different ATtiny.

ATtiny84 Pinout

ATtiny84 and ATtiny84a pinout

If you need additional support, please check out the following resources.

If you want to go further with the ATtiny, please check out our additional tutorials that showcase the ATtiny:

Electronic E-craft Terrarium

A guest tutorial on an Electronic Terrarium from the Performative Sculpture class of Parsons DT.

Night Sky Halloween Costume

Make a beautiful night sky costume using the LilyPad LEDs and the LilyTiny.

Pi AVR Programmer HAT Hookup Guide

In this tutorial, we will use a Raspberry Pi 3 and the Pi AVR Programmer HAT to program an ATMega328P target. We are going to first program the Arduino bootloader over SPI, and then upload an Arduino sketch over a USB serial COM port.

Qwiic Single Relay Hookup Guide

Get started switching those higher power loads around with the Qwiic Single Relay.