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Board

wntrblm·Helium·hardware/board/board.kicad_pcb

Board layout, top view — open source board by wntrblm

About the Board

Board is an open source PCB design by wntrblm, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 20 × 108 mm, with 64 components from 28 distinct parts.

Other key parts include the OPA4991IPWR. By type, the board carries 20 resistors, 17 connectors, 11 capacitors, 10 diodes, 4 ICs and 2 inductors.

It belongs with the audio designs in this gallery.

From the project

Helium is a triple 1-to-3 precision buffered multiple and 3-to-1 precision adder

Helium is a precision buffered multiple and precision adder for Eurorack.

More details available at https://winterbloom.com/shop/helium

This repository contains the hardware design files and user guide for Helium:

- hardware/ contains the hardware design files for the mainboard and blank panel. These are all created using KiCAD. - userguide/** contains the user's guide source files. These are written in Markdown and published using MkDocs.

Main components on the Board

OPA4991IPWR

Board bill of materials (BOM)

64 components, 28 distinct parts.

QtyPartRefs
4
OPA4991IPWR
OPA4991
U1, U2, U4, U6
1
302-S101
Power
J1
1
WQP-WQP518MA
IN A
J2
1
WQP-WQP518MA
OUT A1
J3
1
WQP-WQP518MA
OUT A2
J4
1
WQP-WQP518MA
OUT A3
J5
1
WQP-WQP518MA
IN B
J7
1
WQP-WQP518MA
OUT B1
J8
1
WQP-WQP518MA
OUT B2
J9
1
WQP-WQP518MA
OUT B3
J10
1
WQP-WQP518MA
IN C
J12
1
WQP-WQP518MA
OUT C1
J13
1
WQP-WQP518MA
OUT C2
J14
1
WQP-WQP518MA
OUT C3
J15
1
WQP-WQP518MA
OUT D
J17
1
WQP-WQP518MA
IN D1
J18
1
WQP-WQP518MA
IN D2
J19
1
WQP-WQP518MA
IN D3
J20
2
PMEG2005EGWX
30V
D1, D2
4
APT2012VBC/D
POS
D3, D5, D7, D9
Show 8 more
QtyPartRefs
4
APT2012SURCK
NEG
D4, D6, D8, D10
2
BLM18AG102SN1D
1k @ 100MHz
FB1, FB2
2
GRM21BR61E106KA73K
10u
C1, C2
8
CL10B104KB8NNNC
100n
C3, C4, C5, C6, C7, C8, C9, C10
1
CC0603JPNPO9BN120
12p
C11
10
RT0603FRE0751RL
51R
R1, R2, R3, R5, R6, R7, R12, R13 +2
6
RG1608N-104-W-T1
100k
R4, R8, R15, R18, R19, R20
4
RC0603JR-071K5L
1k5
R9, R10, R11, R16

Board design files

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

Board: common questions

How big is the Board?

The Board measures 20 × 108 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Board?

64 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Board design files?

From the wntrblm/Helium repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Board design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which wntrblm chose for the repository.

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