HardLabs

7seg hat

7m4gmh·7seg-panel·hardware/7seg-hat/7seg-hat.kicad_pcb

7seg hat layout, top view — open source Raspberry Pi board by 7m4gmh

About the 7seg hat

7seg hat is an open source Raspberry Pi PCB design by 7m4gmh, published on GitHub. It is a 2-layer board measuring 65 × 56.5 mm, with 13 components from 8 distinct parts.

Its main chip is the RASPBERRY_PI_4, from the Raspberry Pi family. Other key parts include the K7805M-2000. By type, the board carries 4 connectors, 4 resistors, 2 transistors, 2 capacitors and 1 IC.

It belongs with the displays & leds and dev boards & breakouts designs in this gallery.

From the project

server and utilities for 7-segment LED display panel

基板ごとに独立した KiCad プロジェクトとして、世代・構成別のフォルダに配置しています。

This folder contains independent KiCad projects grouped by hardware generation and configuration.

- 040/ - 7seg-panel-control-040/ - 7seg-panel-control-040-dual/ - 7seg-panel-control-040-single/ - 7seg-panel-control-04in/ - 7seg-panel-display-040-dual/ - 7seg-panel-display-040-dual-24x16/ - 7seg-panel-expand-040/ - 7seg-panel-power-040/ - 7seg-panel-single-04in/ - 040-sparse/ - 7seg-panel-040-display-dual-wide/ - 7seg-panel-040-dual-combined-sparse/

Main components on the 7seg hat

K7805M-2000

7seg hat bill of materials (BOM)

13 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
K7805M-2000
U101
2
BSS138
Q101, Q102
2
I2C
i2c
J101, J104
1
RASPBERRY_PI_4
Raspberry_Pi_4
J102
1
GND-VDD
J103
1
22UF
22uF
C101
1
22uF 6V
C103
4
4K7R
4k7R
R101, R102, R103, R104

7seg hat design files

The KiCad project lives in the 7m4gmh/7seg-panel repository on GitHub; these links point at the commit this page was built from.

7seg hat: common questions

What microcontroller does the 7seg hat use?

The 7seg hat is built around the RASPBERRY_PI_4, from the Raspberry Pi family.

How big is the 7seg hat?

The 7seg hat measures 65 × 56.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 7seg hat?

13 components, from 8 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 7seg hat design files?

From the 7m4gmh/7seg-panel 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 7seg hat design in my own project?

The repository has no license, so all rights stay with 7m4gmh. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the 7seg hat without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.

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