2 open source boards using the ATtiny25-20S
Real designs built with the ATtiny25-20S, 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.
AVR/ArduinoChristmasOrnament
PrincipIoT
94.7 × 112.9 mm27 parts2LNo license0
AVR/ArduinoRGB-LED-controller-
MohamedHassanExp
50.1 × 46 mm24 parts2LMIT0
The ATtiny25-20S in open source designs
The gallery holds 2 open source boards using the ATtiny25-20S from 2 GitHub repositories; a typical one measures about 72.4 × 79.5 mm and carries around 26 components.
100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is ChristmasOrnament by PrincipIoT.
Microcontrollers on boards using the ATtiny25-20S
What boards using the ATtiny25-20S are built for
ATtiny25-20S: common questions
Where can I find a ATtiny25-20S reference design?
Each of the 2 boards on this page is a real design using the ATtiny25-20S. 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 ATtiny25-20S use?
Most are built on AVR/Arduino (2).
How big is a typical board using the ATtiny25-20S?
The median is 72.4 × 79.5 mm, and 100% are two-layer designs.
What is the most popular open source board using the ATtiny25-20S?
By GitHub stars, ChristmasOrnament by PrincipIoT, with 0 stars.
Can I simulate one of these boards using the ATtiny25-20S 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.