3 open source boards using the ATTINY85-20S
Real designs built with the ATTINY85-20S, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
- schematic only · 33 partsAVR/Arduino
HHW HackConRD2024
jrgdiaz
33 partsNo license15 
AVR/ArduinoAttiny85-usb hid
69series
33.7 × 12 mm16 parts2LMIT1
AVR/ArduinoSTART MODULE
bismarx-v1
18.5 × 13 mm12 parts2LNo license3
The ATTINY85-20S in open source designs
The gallery holds 3 open source boards using the ATTINY85-20S from 3 GitHub repositories; a typical one measures about 26.1 × 12.5 mm and carries around 16 components.
100% are two-layer designs, the rest use four layers or more, and 33% carry an open source license.
The most starred is HHW HackConRD2024 by jrgdiaz.
Microcontrollers on boards using the ATTINY85-20S
What boards using the ATTINY85-20S are built for
ATTINY85-20S: common questions
Where can I find a ATTINY85-20S reference design?
Each of the 3 boards on this page is a real design using the ATTINY85-20S. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the ATTINY85-20S use?
Most are built on AVR/Arduino (3).
How big is a typical board using the ATTINY85-20S?
The median is 26.1 × 12.5 mm, and 100% are two-layer designs.
What is the most popular open source board using the ATTINY85-20S?
By GitHub stars, HHW HackConRD2024 by jrgdiaz, with 15 stars.
Can I simulate one of these boards using the ATTINY85-20S before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.