HardLabs

Attiny85

swayerloren·KICAD_ENGINE·19_TEST_PROJECTS/sample_kicad_projects/tomasr8_attiny85_dev_board/attiny85.kicad_pcb

Attiny85 PCB layout, top view — open source AVR/Arduino board by swayerloren
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About the Attiny85 PCB

Attiny85 is an open source AVR/Arduino PCB design by swayerloren, published on GitHub under the MIT license. It is a 2-layer board measuring 44.6 × 16.6 mm, with 13 components from 9 distinct parts.

Its main chip is the ATtiny85-20P, from the AVR/Arduino family. Other key parts include the AMS1117-3.3. By type, the board carries 5 resistors, 4 diodes, 2 ICs and 2 connectors.

From the project

AI-assisted KiCad PCB design workflow for schematics, PCB layouts, DRC, BOM/CPL, and fabrication outputs using Codex or Claude.

Safe sample KiCad projects may live here only after license, attribution, and public-release review. Do not copy active real projects here without explicit approval.

- Keep sample attribution and license files with each sample. - Exclude upstream fabrication outputs unless they are explicitly marked NOTFINAL and required for a review task. - Do not silently repair sample projects. - Do not treat a sample as reference-grade or manufacturing-ready unless the relevant KiCad Engine gates pass. - Put benchmark tasks in 15BENCHMARKS/tasks/ and actual benchmark results in 15BENCHMARKS/results/`.

Main components on the Attiny85

ATtiny85-20PAMS1117-3.3

Attiny85 bill of materials (BOM)

13 components, 9 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATtiny85-20P
U1
1
AMS1117-3.3
U2
1
USB_A
J1
1
Conn_02x05_Odd_Even
J2
2
3.6 Zener
D1, D2
2
LED
D3, D4
1
1K5
R1
2
66
R2, R3
2
470
R4, R5

Attiny85 design files

The KiCad project lives in the swayerloren/KICAD_ENGINE repository on GitHub; these links point at the commit this page was built from.

Attiny85: common questions

What microcontroller does the Attiny85 use?

The Attiny85 is built around the ATtiny85-20P, from the AVR/Arduino family.

How big is the Attiny85 PCB?

The Attiny85 measures 44.6 × 16.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Attiny85?

13 components, from 9 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Attiny85 design files?

From the swayerloren/KICAD_ENGINE repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Attiny85 design in my own project?

Yes, under the terms of its MIT license, which swayerloren chose for the repository.

Can I test firmware for the Attiny85 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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