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ADB2USBC

KlemensMaentele·ADB2USBC

ADB2USBC PCB layout, top view — open source AVR/Arduino board by KlemensMaentele
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About the ADB2USBC PCB

ADB2USBC is an open source AVR/Arduino PCB design by KlemensMaentele, published on GitHub. It is a 2-layer board measuring 33 × 48 mm, with 17 components from 13 distinct parts.

Its main chip is the ATMEGA32U2-A, from the AVR/Arduino family. By type, the board carries 3 connectors, 3 resistors, 1 IC, 1 crystal, 1 switch and 1 capacitor.

It belongs with the keyboards designs in this gallery.

From the project

ADB2USBC adapter

ADB-to-USB Converter for Apple Desktop Bus Keyboards

ADB2USBC is a small PCB that allows vintage Apple ADB keyboards to be used as modern USB HID keyboards. The board is built around an ATmega32U2 microcontroller and is intended to run the ADB-to-USB converter firmware from the TMK Keyboard Firmware project.

This project contains the hardware design files for an ADB-to-USB converter board.

ADB2USBC, from the project README
From the project README

Main components on the ADB2USBC

ATMEGA32U2-A

ADB2USBC bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA32U2-A
ATmega32U2-A
U1
1
CRYSTAL_GND24
Crystal_GND24
Y1
1
USB4110-GF-A
J1
1
5749181-1
J2
1
AVR-ISP-6
J3
1
SW_DPST_X2
SW_DPST_x2
SW1
2
5K1
5k1
ccr1, ccr2
2
22
dr1, dr2
1
1UF
1uf
uc1
2
26PF
26pf
yc1, yc2
1
10UF
10uf
c3
2
10K
10k
R1, R2
1
1k
R3

ADB2USBC design files

The KiCad project lives in the KlemensMaentele/ADB2USBC repository on GitHub; these links point at the commit this page was built from.

ADB2USBC: common questions

What microcontroller does the ADB2USBC use?

The ADB2USBC is built around the ATMEGA32U2-A, from the AVR/Arduino family.

How big is the ADB2USBC PCB?

The ADB2USBC measures 33 × 48 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ADB2USBC?

17 components, from 13 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 ADB2USBC design files?

From the KlemensMaentele/ADB2USBC 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 ADB2USBC design in my own project?

The repository has no license, so all rights stay with KlemensMaentele. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the ADB2USBC 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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