13 open source boards using the ATtiny402-SS
Real designs built with the ATtiny402-SS, 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.
Nordic nRFSolar nRF.kicad pro
PocketConcepts
35.9 × 35.5 mm53 parts2LNo license341
AVR/ArduinoPCB avr dx unbricker
k-takata
72 × 47.5 mm36 parts2LNo license4
AVR/ArduinoPCB Christmas Tree
KNEAGHUST
100 × 98.6 mm41 parts2LMIT2
AVR/ArduinoWatch
tux2603
27.5 × 27.5 mm23 parts2LCC-BY-NC-4.02
AVR/ArduinoVdo breakout
nagutierrez
47 × 48 mm30 parts4LCC-BY-NC-4.00
AVR/ArduinoSaintcon-2026-minibadge
ZeroStack-Labs
25.4 × 25.4 mm7 parts2LMIT0
AVR/ArduinoLatest
dennisss
32 × 32 mm89 parts6LApache-2.0381
ESP8266ESPTiny402
tomtor
26.4 × 23.9 mm15 parts2LGPL-3.04
ESP8266ESPTiny402-hand-SOT89
26.4 × 23.9 mm15 parts2LGPL-3.04
ESP8266ESPTiny402-SOT89
26.4 × 23.9 mm15 parts2LGPL-3.04
ESP8266ESPTiny402-SOT89-shove
26.4 × 23.9 mm15 parts2LGPL-3.04
AVR/ArduinoSerial usbc dip-7seg clk
McbeEringi
100 × 100 mm42 parts2LMIT2
AVR/ArduinoJogi
Tert2
100 × 99 mm24 parts2LNo license0
The ATtiny402-SS in open source designs
The gallery holds 13 open source boards using the ATtiny402-SS from 10 GitHub repositories; a typical one measures about 32 × 32 mm and carries around 24 components.
85% are two-layer designs, the rest use four layers or more, and 62% carry an open source license.
The most starred is Latest by dennisss.
Microcontrollers on boards using the ATtiny402-SS
What boards using the ATtiny402-SS are built for
ATtiny402-SS: common questions
Where can I find a ATtiny402-SS reference design?
Each of the 13 boards on this page is a real design using the ATtiny402-SS. 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 ATtiny402-SS use?
Most are built on AVR/Arduino (8), ESP8266 (4) and Nordic nRF (1).
How big is a typical board using the ATtiny402-SS?
The median is 32 × 32 mm, and 85% are two-layer designs.
What is the most popular open source board using the ATtiny402-SS?
By GitHub stars, Latest by dennisss, with 381 stars.
Can I simulate one of these boards using the ATtiny402-SS 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.