HardLabs

Hardware

afms135·signl·Hardware/Hardware.kicad_pcb

Hardware PCB layout, top view — open source Raspberry Pi board by afms135

About the Hardware PCB

Hardware is an open source Raspberry Pi PCB design by afms135, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 108.1 × 61.2 mm, with 65 components from 23 distinct parts.

Its main chip is the Raspberry_Pi_2_3, from the Raspberry Pi family. Other key parts include the MCP3004 and WM8731SEDS. By type, the board carries 30 capacitors, 20 resistors, 5 connectors, 2 ICs, 1 crystal and 1 switch.

It belongs with the audio designs in this gallery.

From the project

An Open Source Real-Time Audio Effects Processor running on Raspberry Pi

signl is an audio effects processor developed to provide an open-source (modifiable and extendable), real-time (no noticable playing latency), low-cost (Raspberry Pi based) standalone unit for musicians. Development started at the University of Glasgow for ENG5220: Real Time Embedded Programming 2019-2020.

Mic or Line level in Line and Headphone out Up to five serial audio effects Real time parameter control of each effect Easy to understand GUI Half rack size

Hardware, from the project README
From the project README

Main components on the Hardware

MCP3004WM8731SEDS

Hardware bill of materials (BOM)

65 components, 23 distinct parts.

QtyPartRefs
1
MCP3004
U1
1
WM8731SEDS
U2
1
CO4305-12.000
Y1
1
LINEIN
J1
1
MICIN
J2
1
Raspberry_Pi_2_3
J3
1
LOUT
J4
1
HPOUT
J5
1
DOGM128W-6
DS1
4
10k
RV1, RV2, RV3, RV4
1
100K
RV5
1
JS5208
SW1
9
1u
C1, C2, C3, C4, C5, C6, C7, C9 +1
6
1u
C8, C12, C15, C16, C27, C28
3
220p
C11, C13, C14
5
10u
C17, C18, C24, C25, C26
5
0.1u
C19, C20, C21, C22, C23
2
220u
C29, C30
7
10k
R1, R2, R3, R4, R5, R12, R13
5
47k
R6, R15, R16, R17, R18
Show 3 more
QtyPartRefs
4
5.6k
R7, R8, R9, R10
1
680
R11
3
100
R14, R19, R20

Hardware design files

The KiCad project lives in the afms135/signl repository on GitHub; these links point at the commit this page was built from.

Hardware: common questions

What microcontroller does the Hardware use?

The Hardware is built around the Raspberry_Pi_2_3, from the Raspberry Pi family.

How big is the Hardware PCB?

The Hardware measures 108.1 × 61.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hardware?

65 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the Hardware design files?

From the afms135/signl repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Hardware design in my own project?

Yes, under the terms of its GPL-3.0 license, which afms135 chose for the repository.

Can I test firmware for the Hardware 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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