HardLabs

QEZ

str-dst·QEZ·pcb/qez.kicad_pcb

QEZ PCB layout, top view — open source AVR/Arduino board by str-dst
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About the QEZ PCB

QEZ is an open source AVR/Arduino PCB design by str-dst, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 194.3 × 79 mm, with 78 components from 23 distinct parts.

Its main chip is the ATMEGA32U2-AU, from the AVR/Arduino family. Other key parts include the SRV05-4. By type, the board carries 40 LEDs, 19 diodes, 7 resistors, 6 capacitors, 2 ICs and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A seamless, gasketmounted QAZ-like 40% keyboard

- Powered by an Atmega32u2 - Basic ESD and overvoltage protection - Centered USB type-C port for a detachable cable - Multiple layout options (see below) - Fully programmable using QMK and Vial

QEZ, from the project README
From the project README

Main components on the QEZ

ATMEGA32U2-AUSRV05-4

QEZ bill of materials (BOM)

78 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U2-AU
ATmega32U2-AU
U1
1
SRV05-4
U2
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
X1
1
C69688
Polyfuse_Small
F1
1
MX-LED
MX34
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
USB1
31
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +23
2
MX-NoLED
MX10, MX11
1
MX-NoLED
MX21
1
MX-NoLED
MX30
1
MX-NoLED
MX33
2
MX-NoLED
MX35, MX39
1
MX-NoLED
MX40
1
MX-LED
MX41
19
C68978
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +11
1
10UF
10uF
C1
2
0.1UF
0.1uF
C2, C3
1
1UF
1uF
C5
2
22PF
22pF
C6, C7
2
5.1K
5.1k
R1, R2
Show 3 more
QtyPartRefs
2
22
R3, R4
2
10K
10k
R5, R6
1
1.5K
1.5k
R7

QEZ design files

The KiCad project lives in the str-dst/QEZ repository on GitHub; these links point at the commit this page was built from.

QEZ: common questions

What microcontroller does the QEZ use?

The QEZ is built around the ATMEGA32U2-AU, from the AVR/Arduino family.

How big is the QEZ PCB?

The QEZ measures 194.3 × 79 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the QEZ?

78 components, from 23 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 QEZ design files?

From the str-dst/QEZ repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the QEZ design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the QEZ 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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