HardLabs

4x6

regack·4x6

4x6 PCB layout, top view — open source AVR/Arduino board by regack

About the 4x6 PCB

4x6 is an open source AVR/Arduino PCB design by regack, published on GitHub. It is a board measuring 75.4 × 113.7 mm, with 79 components from 23 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. By type, the board carries 23 switches, 22 diodes, 11 connectors, 8 capacitors, 5 resistors and 4 LEDs.

It belongs with the keyboards designs in this gallery.

From the project

4x6 Keypad

Main components on the 4x6

ATMEGA32U4

4x6 bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA32U4
IC1
1
ASX3F
X1
1
MINI
J1
1
MISO
P1
1
Vcc
P2
1
SCK
P3
1
MOSI
P4
1
RES
P5
1
GND
P6
4
GND
P200, P201, P202, P203
1
HOLE
H2
3
R
RF1, RF2, RF3
1
DTSM-6
S0
20
MX1A
S1, S2, S3, S4, S5, S6, S7, S8 +12
2
MX1A
S17, S18
4
LED
DC1, DF1, DF2, DF3
22
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +14
2
22P
22p
C1, C2
2
1u
C3, C8
4
100N
100n
C4, C5, C6, C7
Show 3 more
QtyPartRefs
2
22
R1, R2
2
10K
10k
R3, R5
1
300
R4

4x6 design files

The KiCad project lives in the regack/4x6 repository on GitHub; these links point at the commit this page was built from.

4x6: common questions

What microcontroller does the 4x6 use?

The 4x6 is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the 4x6 PCB?

The 4x6 measures 75.4 × 113.7 mm and is 1.6002 mm thick.

How many components are on the 4x6?

79 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 4x6 design files?

From the regack/4x6 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the 4x6 design in my own project?

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

Can I test firmware for the 4x6 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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