HardLabs

Attiny85-testboard

cnlohr·cnhardware·attiny85-testboard/attiny85-testboard.kicad_pcb

Attiny85-testboard PCB layout, top view — open source AVR/Arduino board by cnlohr

About the Attiny85-testboard PCB

Attiny85-testboard is an open source AVR/Arduino PCB design by cnlohr, published on GitHub under the MIT license. It is a 2-layer board measuring 33 × 25.4 mm, with 5 components from 4 distinct parts.

Its main chip is the ATtiny85-20S, from the AVR/Arduino family. By type, the board carries 3 connectors, 1 IC and 1 capacitor.

From the project

My dumping grounds for all my kicad projects and random hardware bringup.

NOTE FOR PULL REQUESTS: I DO NOT ACCEPT MASS ADDS. If you have 5-6 really awesome parts, I'll accept a pull request, but if you have say 10+ parts, I will not. Select only the neatest. Also, make sure JLCPCB offers the parts, if they're intended for board mounting!

Discussion of ferrite cores and what their recommended power is Another doc like the above, but with different info Discussion of building ferrite cores Breakdown voltages of enameld copper wire * Enameld wire datasheet

Main components on the Attiny85-testboard

ATtiny85-20S

Attiny85-testboard bill of materials (BOM)

5 components, 4 distinct parts.

QtyPartRefs
1
ATtiny85-20S
U1
2
CB
J1, J3
1
ISP
J2
1
1uF
C1

Attiny85-testboard design files

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

Attiny85-testboard: common questions

What microcontroller does the Attiny85-testboard use?

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

How big is the Attiny85-testboard PCB?

The Attiny85-testboard measures 33 × 25.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Attiny85-testboard?

5 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Attiny85-testboard design files?

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

Can I use the Attiny85-testboard design in my own project?

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

Can I test firmware for the Attiny85-testboard 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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