HardLabs

Ec2test

Gabenewman·Ec2test·src/cmio.kicad_pcb

Ec2test PCB layout, top view — open source Raspberry Pi board by Gabenewman

About the Ec2test PCB

Ec2test is an open source Raspberry Pi PCB design by Gabenewman, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 72.4 × 26.6 mm, with 43 components from 25 distinct parts.

Its main chip is the Raspberry Pi Compute Module 1/3/3L, from the Raspberry Pi family. Other key parts include the AP3417B, AP2138 and AP2401. By type, the board carries 13 resistors, 12 capacitors, 8 connectors, 4 ICs, 2 transistors and 2 diodes.

From the project

Note that this circuit is currently untested, as such I cannot guarantee that it will function correctly.

Note that this circuit is currently untested, as such I cannot guarantee that it will function correctly.

This is a custom Raspberry Pi Compute Module IO Board. Designed for low cost production, and a minimal set of components.

Because low cost production was the main focus of the project, this Compute Module IO board only has a subset of features in comparison to the official version. However, whilst the official version costs £115, this design aims to produce a Compute Module IO board that can be manufactured (PCB fabrication, BOM, et al) under £30.

Ec2test, from the project README
From the project README

Main components on the Ec2test

AP3417BAP2138AP2401

Ec2test bill of materials (BOM)

43 components, 25 distinct parts.

QtyPartRefs
2
AP3417B
U1, U2
1
AP2138
U3
1
AP2401
U4
2
2N7002
Q1, Q2
1
USB_POWER
J1
1
BANK0
J2
1
USB_OTG
J3
1
Raspberry Pi Compute Module 1/3/3L
J4
1
TVOUT
J5
1
BANK1
J6
1
Micro_SD_Card_Molex_47309-2651
J7
1
RUN
J8
1
PWR LED
D1
1
STATUS LED
D2
2
2.2uH
L1, L2
4
4.7uF
C1, C2, C5, C6
2
1uF
C3, C4
3
47uF
C7, C10, C12
2
0.1uF
C8, C9
1
0.1uF
C11
Show 5 more
QtyPartRefs
8
100k
R1, R2, R7, R8, R9, R10, R11, R12
1
200k
R3
1
450k
R4
2
470R
R5, R13
1
10k
R6

Ec2test design files

The KiCad project lives in the Gabenewman/Ec2test repository on GitHub; these links point at the commit this page was built from.

Ec2test: common questions

What microcontroller does the Ec2test use?

The Ec2test is built around the Raspberry Pi Compute Module 1/3/3L, from the Raspberry Pi family.

How big is the Ec2test PCB?

The Ec2test measures 72.4 × 26.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ec2test?

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

Where can I download the Ec2test design files?

From the Gabenewman/Ec2test repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ec2test design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which Gabenewman chose for the repository.

Can I test firmware for the Ec2test 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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