HardLabs

Digit

kuellenberg·7-Segment-RGB-Clock·Digit/Digit.kicad_pcb

Digit PCB layout, top view — open source AVR/Arduino board by kuellenberg

About the Digit PCB

Digit is an open source AVR/Arduino PCB design by kuellenberg, published on GitHub. It is a 2-layer board measuring 107 × 213 mm, with 98 components from 29 distinct parts.

Its main chip is the ATMEGA328P-AU-AK, from the AVR/Arduino family. Other key parts include the FT232RL and DS3231M. By type, the board carries 62 diodes, 16 resistors, 13 capacitors, 4 connectors and 3 ICs.

Digit, from the project README
From the project README

Main components on the Digit

FT232RLATMEGA328P-AU-AKDS3231M

Digit bill of materials (BOM)

98 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
FT232RL
TLC5952
U1
1
ATMEGA328P-AU-AK
TLC5952
U2
1
DS3231M
74LS244
U3
1
CONN_02X04_ODD_EVEN
DC IN
J1
1
CONN_01X02
DC OUT
J2
1
CONN_02X03_ODD_EVEN
Signal in
J3
1
CONN_02X04_TOP_BOTTOM
Signal out
J4
2
859-LTSTC193TBKT5A
LED_RGB
D1, D2
2
SS1P3L
LED_RGB
D3, D9
1
859-LTST-C191KFKT
LED_RGB
D4
2
…
LED_RGB
D5, D6
1
859-LTST-C190KGKT
LED_RGB
D7
1
859-LTST-C190KRKT
LED_RGB
D8
47
LED_RGB
D10, D11, D12, D13, D14, D15, D16, D17 +39
2
D_TVS
D57, D62
4
5V
D58, D59, D60, D61
2
330UF
100n
C1, C2
2
10NF
330uF
C3, C6
2
100UF
330uF
C4, C5
3
100NF
100n
C7, C8, C10
Show 9 more
QtyPartRefs
2
4U7
100n
C9, C11
2
100NF
10uF
C12, C13
8
R_Small
R1, R2, R3, R4, R5, R6, R7, R16
2
4K7
R_Small
R8, R9
1
LDR07
R_Small
R10
2
10K
R_Small
R11, R12
1
330R
R_Small
R13
1
100R
R_Small
R14
1
47K
R_Small
R15

Digit design files

The KiCad project lives in the kuellenberg/7-Segment-RGB-Clock repository on GitHub; these links point at the commit this page was built from.

Digit: common questions

What microcontroller does the Digit use?

The Digit is built around the ATMEGA328P-AU-AK, from the AVR/Arduino family.

How big is the Digit PCB?

The Digit measures 107 × 213 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Digit?

98 components, from 29 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 Digit design files?

From the kuellenberg/7-Segment-RGB-Clock repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Digit design in my own project?

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

Can I test firmware for the Digit 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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