Noise board
About the Noise board
Noise board is an open source PCB design by lennartquerter, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 35 × 25 mm, with 42 components from 27 distinct parts.
Other key parts include the TL072. By type, the board carries 17 resistors, 16 capacitors, 2 ICs, 2 transistors, 2 connectors and 2 test points.
It belongs with the audio designs in this gallery.
From the project
Lenimal Github for DIY for a Eurorack Synth
Status: ✅ Ready for production (v1). Routed, DRC clean, 25 × 35 mm, sent to JLCPCB. Full build/calibration guide: SCHEMATIC.md. A tiny SMD daughterboard carrying one known-good white-noise generator. It mounts on the back of a host module via board-to-board headers — no front panel, no main-board real estate — and is meant to be reused across projects (drums, wind/ocean FX, sample-and- hold randomness, etc.).
Main components on the Noise board
Noise board bill of materials (BOM)
42 components, 27 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TL072 | SOIC-8 | U1, U2 |
| 1 | MMBT3904 | SOT-23 | Q1 |
| 1 | 2N3904 | TO-92_HandSolder | Q2 |
| 1 | CONN_01X03 Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | CONN_01X02 Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J2 |
| 1 | 1M | Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 1 | NOISE_A | TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded | TP1 |
| 1 | NOISE_B | TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded | TP2 |
| 1 | 10UF 10uF | CP_Radial_D4.0mm_P2.00mm | C1 |
| 2 | 1UF 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C9 |
| 4 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C11, C12 |
| 1 | 220NF 220nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 3 | 2.2PF 2.2pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6, C13, C14 |
| 1 | 82NF 82nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 33NF 33nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 22NF 22nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 2 | 4.7UF 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15, C16 |
| 2 | 1M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R6 |
| 3 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R16, R17 |
| 4 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R10, R12, R13 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 100K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R11 |
| 1 | 7K5 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 2K7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 1K8 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 330R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 39K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 1 | 12K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15 |
Noise board design files
The KiCad project lives in the lennartquerter/euro-rack-synth repository on GitHub; these links point at the commit this page was built from.
Noise board: common questions
How big is the Noise board?
The Noise board measures 35 × 25 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Noise board?
42 components, from 27 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Noise board design files?
From the lennartquerter/euro-rack-synth repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Noise board design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
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