2 layers100 × 126 mm
Hubble lens
wntrblm/Helium
Helium is a triple 1-to-3 precision buffered multiple and 3-to-1 precision adder
28 parts17
2 layers20 × 108 mm
Helium
wntrblm/Helium17Helium is a triple 1-to-3 precision buffered multiple and 3-to-1 precision adder
- Size
- 20 × 108 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 55
- Pads
- 192
- Tracks, vias
- 209, 109
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 8 Oct 2021
- Updated
- 18 Apr 2025
Overview
Helium is an open-source printed circuit board by wntrblm, from the wntrblm/Helium repository on GitHub. It is a 2-layer board of 20 × 108 mm with 67 parts on 55 nets, routed with 209 tracks and 109 vias.
It is built around the OPA4991ID, RT0603FRE0751RL and RG1608N-104-W-T1, with the RC0603JR-071K5L, APT2012SURCK and PMEG2005EGWX among its other parts. Its parts include 20 resistors, 17 connectors, 11 capacitors, 10 diodes and 4 ICs. It belongs with the audio and music boards of this library.
Main components
9
OPA4991ID
SOIC-14-20V~-1.35V、1.35V~20V -40℃~+125℃ 10.8nV/√Hz@1kHz 10pA 10pA 125uV 130dB 2.7V~40V 21V/us 300nV/℃ 4 4.5MHz 560uA 75mA Enable/shutdown function、EMI filtering/RF suppression Rail-to-Rail Input, Rail-to-Rail Output SOIC-14 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
RT0603FRE0751RL
0603Chip Resistor - Surface MountYAGEORG1608N-104-W-T1
0603-55℃~+155℃ 100kΩ 100mW Thin Film Resistor ±0.05% ±10ppm/℃ 0603 Chip Resistor - Surface Mount ROHSSusumuChip Resistor - Surface Mount
RC0603JR-071K5L
UncategorisedUnknown maker
APT2012SURCK
0805-40℃~+85℃ 1.95V 120° 20mA 230mcd 630nm 645nm 75mW Discrete Diode Red Water Clear 0805 LED Indication - Discrete ROHSKingbrightLED Indication - Discrete
PMEG2005EGWX
SOD-1231 Independent 10A 200uA@20V 20V 390mV@500mA 500mA SOD-123 Schottky Diodes ROHSNexperiaSchottky Diodes
CC0603JPNPO9BN120
060312pF 50V NP0 ±5% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
WQP-WQP518MA
-- Audio Connectors ROHSQingPuAudio Connectors
302-S101
插件Wire To Board ConnectorOn-Shore Tech
README
README.mdWinterbloom Helium
Helium is a precision buffered multiple and precision adder for Eurorack.
More details available at https://winterbloom.com/shop/helium
Repository layout
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.
- user_guide/ contains the user's guide source files. These are written in Markdown and published using MkDocs.
License and contributing
Helium is open-source hardware and software, however, licensing a project like this is a little complicated. Please take a chance to review the LICENSE file.
We welcome contributions! Please read our Code of Conduct first.
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 51R | winterbloom:R_0603_HandSolder | R1, R2, R3, R5, R6, R7, R12, R13, R14, R17 |
| 8 | 100n | winterbloom:C_0603_HandSolder | C3, C4, C5, C6, C7, C8, C9, C10 |
| 6 | 100k | winterbloom:R_0603_HandSolder | R4, R8, R15, R18, R19, R20 |
| 4 | 1k5 | winterbloom:R_0603_HandSolder | R9, R10, R11, R16 |
| 4 | NEG | winterbloom:LED_0805_Kingbright_APT2012 | D4, D6, D8, D10 |
| 4 | OPA4991 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U1, U2, U4, U6 |
| 4 | POS | winterbloom:LED_0805_Kingbright_APT2012 | D3, D5, D7, D9 |
| 2 | 10u | winterbloom:C_0805_HandSolder | C1, C2 |
| 2 | 1k @ 100MHz | winterbloom:L_0603_HandSolder | FB1, FB2 |
| 2 | 30V | winterbloom:D_SOD-123+SOD-123F | D1, D2 |
| 1 | Graphics | ||
| 1 | 12p | winterbloom:C_0603_HandSolder | C11 |
| 1 | IN A | winterbloom:AudioJack_WQP518MA_Compact_S | J2 |
| 1 | IN B | winterbloom:AudioJack_WQP518MA_Compact_S | J7 |
| 1 | IN C | winterbloom:AudioJack_WQP518MA_Compact_S | J12 |
| 1 | IN D1 | winterbloom:AudioJack_WQP518MA_Compact_S | J18 |
| 1 | IN D2 | winterbloom:AudioJack_WQP518MA_Compact_S | J19 |
| 1 | IN D3 | winterbloom:AudioJack_WQP518MA_No_S | J20 |
| 1 | LOGO | winterbloom:Extra_Long_Wiggly_Boi_25mm | G*** |
| 1 | OUT A1 | winterbloom:AudioJack_WQP518MA_Compact_S | J3 |
| 1 | OUT A2 | winterbloom:AudioJack_WQP518MA_No_S | J4 |
| 1 | OUT A3 | winterbloom:AudioJack_WQP518MA_No_S | J5 |
| 1 | OUT B1 | winterbloom:AudioJack_WQP518MA_Compact_S | J8 |
| 1 | OUT B2 | winterbloom:AudioJack_WQP518MA_No_S | J9 |
| 1 | OUT B3 | winterbloom:AudioJack_WQP518MA_No_S | J10 |
| 1 | OUT C1 | winterbloom:AudioJack_WQP518MA_Compact_S | J13 |
| 1 | OUT C2 | winterbloom:AudioJack_WQP518MA_No_S | J14 |
| 1 | OUT C3 | winterbloom:AudioJack_WQP518MA_No_S | J15 |
| 1 | OUT D | winterbloom:AudioJack_WQP518MA_No_S | J17 |
| 1 | Power | winterbloom:Eurorack_Power_2x5_Shrouded_Lock | J1 |
The 66 most common of 67 parts.
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Questions
How big is the Helium PCB?
It measures 20 × 108 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Helium use?
67 parts, built around the OPA4991ID, RT0603FRE0751RL, RG1608N-104-W-T1 and RC0603JR-071K5L. 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 Helium KiCad files?
From the wntrblm/Helium repository on GitHub, at the commit this page was made from: the board is hardware/board/board.kicad_pcb and its schematic hardware/board/board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Helium design in my own project?
Its repository states no licence, so its author keeps all rights: ask wntrblm before reusing the design.