2 layers160 × 100 mm
CLOCK
Desval27/FormantKO
Knock-off of the Elektor Formant Synthesizer project with the initial goal of being quasi-authentic and secondary goal undecided. Probably tweaks of some kind.
135 partsMIT
2 layers160 × 100 mm
TUNING
Desval27/FormantKOKnock-off of the Elektor Formant Synthesizer project with the initial goal of being quasi-authentic and secondary goal undecided. Probably tweaks of some kind.
- Size
- 160 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 44
- Pads
- 121
- Tracks, vias
- 231, 0
- Pours
- 15
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 May 2026
- Updated
- 28 Aug 2026
Overview
TUNING is an open-source printed circuit board by Desval27, from the Desval27/FormantKO repository on GitHub, published under the MIT licence. It is a 2-layer board of 160 × 100 mm with 27 parts on 44 nets, routed with 231 tracks and 0 vias.
It is built around the S1A, S1B and S1M. Its parts include 11 connectors, 7 resistors, 4 capacitors, 3 ICs and 1 switch. It belongs with the audio and music boards of this library.
Main components
3
S1A
SMA(DO-214AC)1 Independent 1.1V@1A 1A 30A 50V 5uA@50V SMA(DO-214AC) Diodes - General Purpose ROHSDiodes IncorporatedDiodes - General PurposeS1B
SMA(DO-214AC)-65℃~+150℃ 1 Independent 1.1V@1A 100V 1A 5uA@100V SMA(DO-214AC) Diodes - General Purpose ROHSDiodes IncorporatedDiodes - General PurposeS1M
SMA(DO-214AC)-65℃~+150℃ 1 Independent 1.1V@1A 1A 1kV 5uA@1kV SMA(DO-214AC) Diodes - General Purpose ROHSDiodes IncorporatedDiodes - General Purpose
README
MFOS/panels/ANALOG/README.mdParts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | µA741C | FormantKO:DIP-8 | IC1, IC2, IC3 |
| 2 | 100k | FormantKO:R_Axial_Horizontal | R3, R4 |
| 2 | 1k | FormantKO:Potentiometer_Trimmer | P1, P2 |
| 2 | 470n | FormantKO:C_Rect_300 | C3, C4 |
| 2 | 47n | FormantKO:C_Rect_300 | C1, C2 |
| 1 | 10k | FormantKO:R_Axial_Horizontal | R2 |
| 1 | 220Ω | FormantKO:R_Axial_Horizontal | R7 |
| 1 | 470R | FormantKO:Potentiometer_Trimmer_MultiTurn | P3 |
| 1 | 470Ω | FormantKO:R_Axial_Horizontal | R6 |
| 1 | 560R | FormantKO:R_Axial_Horizontal | R1 |
| 1 | 56k | FormantKO:R_Axial_Horizontal | R5 |
| 1 | Card Bracket | FormantKO:CardBracket | MH1 |
| 1 | CardConnector | FormantKO:CardConnector | J1 |
| 1 | EOS | FormantKO:PanelConnector_1x02 | J2 |
| 1 | EOS | FormantKO:Wire_1x01_General | J4 |
| 1 | IOS SELECT | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Vertical | J3 |
| 1 | ON/OFF | FormantKO:PanelConnector_1x03 | S1 |
| 1 | S1a | FormantKO:Wire_1x01_General | J6 |
| 1 | S1b | FormantKO:Wire_1x01_General | J7 |
| 1 | S1m | FormantKO:Wire_1x01_General | J8 |
| 1 | ⊥ | FormantKO:Wire_1x01_General | J5 |
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Questions
How big is the TUNING PCB?
It measures 160 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TUNING use?
27 parts, built around the S1A, S1B and S1M. 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 TUNING KiCad files?
From the Desval27/FormantKO repository on GitHub, at the commit this page was made from: the board is modules/TUNING/TUNING.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the TUNING design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).