4 layers55.2 × 42 mm Epdiy v7-raw, the printed circuit board in 3D

Epdiy v7-raw

An modest attempt to build an e-reader using a stm32MP1

Size: 55.2 × 42 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 62
Nets: 64
Pads: 257
Tracks, vias: 768, 125
Pours: 7
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 17 Mar 2025
Updated: 18 Mar 2025

Overview

Epdiy v7-raw is an open-source printed circuit board by cnicolasgr, from the cnicolasgr/STM32_e-reader repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 55.2 × 42 mm with 62 parts on 64 nets, routed with 768 tracks and 125 vias.

It is built around the RT9080-33GJ5, TPS651851RSLR and MBR0540. Its parts include 29 capacitors, 13 resistors, 6 diodes, 3 ICs and 3 connectors.

Main components

README

README.md

STM32_e-reader

A modest attempt to build an e-reader using a stm32MP1.

[!CAUTION] THIS IS A WORK IN PROGRESS. HACK AROUND AT YOUR OWN RISK. I didn't test the board yet and can't be held responsible for any magic smoke 💨

I'm planning to use the KOReader on OpenSTLinux for the software side, and a modified epdiy driver board for the hardware. The first version will be using a ED060XC3 screen with a TMA340 touch screen.

Here is the test board: based on these PCBs from @martinberlin:

Parts

Qty	Value	Footprint	References
10	4.7uF	Capacitor_SMD:C_0805_2012Metric	C1, C4, C5, C7, C8, C11, C24, C26, C28, C31
6	10uF	Capacitor_SMD:C_0805_2012Metric	C2, C3, C9, C12, C19, C32
6	MBR0540	Diode_SMD:D_SOD-123	D1, D2, D3, D4, D5, D6
4	47k	Resistor_SMD:R_0603_1608Metric	R26, R27, R28, R29
3	1uF/25V	Capacitor_SMD:C_0805_2012Metric	C35, C37, C38
2	100nF	Capacitor_SMD:C_0805_2012Metric	C29, C30
2	10nF	Capacitor_SMD:C_0805_2012Metric	C20, C25
2	1M	Resistor_SMD:R_0603_1608Metric	R19, R23
2	1uF/50V	Capacitor_SMD:C_1206_3216Metric	C34, C36
2	2.2uF	Capacitor_SMD:C_0805_2012Metric	C27, C33
2	22uF	Capacitor_SMD:C_0805_2012Metric	C6, C10
2	5.1k	Resistor_SMD:R_0603_1608Metric	R4, R6
1	+15V	TestPoint:TestPoint_Pad_D2.5mm	TP4
1	+22V	TestPoint:TestPoint_Pad_D2.5mm	TP1
1	-15V	TestPoint:TestPoint_Pad_D2.5mm	TP2
1	-20V	TestPoint:TestPoint_Pad_D2.5mm	TP3
1	100k	Resistor_SMD:R_0603_1608Metric	R30
1	10k	Resistor_SMD:R_0603_1608Metric	R1
1	10k/3380K	Resistor_SMD:R_0603_1608Metric	TH1
1	2.2uH	Inductor_SMD:L_Taiyo-Yuden_NR-40xx_HandSoldering	L2
1	4.7uH	Inductor_SMD:L_Taiyo-Yuden_NR-50xx_HandSoldering	L1
1	43k	Resistor_SMD:R_0603_1608Metric	R18
1	47.5k	Resistor_SMD:R_0603_1608Metric	R24
1	52.3k	Resistor_SMD:R_0603_1608Metric	R20
1	Conn_01x04	Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical	J1
1	Conn_01x08_Pin	epaper-breakout:CONN8_FH34SRJ_HIR	J4
1	Conn_01x20	Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical	J2
1	ED060XC5	footprints:X05A20H34G	U10
1	RT9080-33GJ5	Package_TO_SOT_SMD:TSOT-23-5	U1
1	TPS651851RSLR	epaper-breakout:TPS651851RSLR	U3
1	VCOM	TestPoint:TestPoint_Pad_D2.5mm	TP5

Questions

How big is the Epdiy v7-raw PCB?

It measures 55.2 × 42 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Epdiy v7-raw use?

62 parts, built around the RT9080-33GJ5, TPS651851RSLR and MBR0540. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Epdiy v7-raw KiCad files?

From the cnicolasgr/STM32_e-reader repository on GitHub, at the commit this page was made from: the board is test_board/epdiy-v7-raw.kicad_pcb and its schematic test_board/epdiy-v7-raw.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Epdiy v7-raw design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/cnicolasgr-stm32-e-reader" title="Epdiy v7-raw in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/cnicolasgr-stm32-e-reader.jpg" alt="Epdiy v7-raw" width="1200" height="900">

A picture that opens the board, for a README

[![Epdiy v7-raw](https://pcbkit.io/embed/boards/cnicolasgr-stm32-e-reader.jpg?size=s)](https://pcbkit.io/boards/cnicolasgr-stm32-e-reader)

Source

Repository: cnicolasgr/STM32_e-reader
Board file: test_board/epdiy-v7-raw.kicad_pcb
Commit: 636b8f0
Licence: GPL-3.0

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