HardLabs

4040

lexerq·4040

4040 PCB layout, top view — open source AVR/Arduino board by lexerq

About the 4040 PCB

4040 is an open source AVR/Arduino PCB design by lexerq, published on GitHub. It is a 2-layer board measuring 281.7 × 77 mm, with 128 components from 25 distinct parts.

Its main chip is the ATmega32U4-A, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6. By type, the board carries 58 LEDs, 49 diodes, 7 capacitors, 7 resistors, 2 ICs and 1 crystal.

4040, from the project README
From the project README

Main components on the 4040

USBLC6-2SC6ATmega32U4-A

4040 bill of materials (BOM)

128 components, 25 distinct parts.

QtyPartRefs
1
USBLC6-2SC6
U1
1
ATmega32U4-A
U2
1
16MHz
Y1
1
USB_C_Receptacle_USB2.0_16P
J1
1
500mA
F2
1
MX-NoLED
LS1
1
SW_Push
SW1
1
MX-NoLED
ENTER1
10
WS2812B
HL1, HL2, HL3, HL4, HL5, HL6, HL7, HL8 +2
1
MX-NoLED
LSH1
35
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +27
1
MX-NoLED
MX14
7
MX-NoLED
MX40, MX41, MX42, MX46, MX47, MX48, MX49
1
MX-NoLED
RS1
1
MX-NoLED
RSH1
1
MX-NoLED
TAB1
49
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +41
3
0.1uF
C1, C2, C5
2
22pF
C3, C4
1
10uF
C6
Show 5 more
QtyPartRefs
1
1uF
C7
2
22
R1, R2
2
10k
R3, R4
2
5K1
R5, R6
1
500
R7

4040 design files

The KiCad project lives in the lexerq/4040 repository on GitHub; these links point at the commit this page was built from.

4040: common questions

What microcontroller does the 4040 use?

The 4040 is built around the ATmega32U4-A, from the AVR/Arduino family.

How big is the 4040 PCB?

The 4040 measures 281.7 × 77 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 4040?

128 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the 4040 design files?

From the lexerq/4040 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 4040 design in my own project?

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

Can I test firmware for the 4040 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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