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 × 233.4 mm
SEQUENCER
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 × 233.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 51
- Nets
- 193
- Pads
- 358
- Tracks, vias
- 0, 0
- Pours
- 3
- Routed
- Not yet
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 May 2026
- Updated
- 28 Aug 2026
Overview
SEQUENCER 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 × 233.4 mm with 51 parts on 193 nets.
It is built around the CD4049BD, CD4024BF and CD4011. Its parts include 19 ICs, 13 resistors, 6 connectors, 5 capacitors and 5 diodes. It belongs with the audio and music boards of this library.
Main components
3
CD4049BD
DIP-16-10℃~+70℃ 3V~15V 4uA 6 6 6.8mA 6.8mA 65ns@5V,50pF CD4 DIP-16 Buffers, Drivers, Receivers, Transceivers ROHSSungineBuffers, Drivers, Receivers, Transceivers
CD4024BF
CDIP(J)-14CDIP(J)-14 Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
CD4011
SOP-14-40℃~+85℃ 1.5V、3V、4V 2 3.5V、7V、11V 35ns@15V,50pF、45ns@10V,50pF、110ns@5V,50pF 4 4.95V、9.95V、14.95V 50mV CD4 NAND Gate SOP-14 Logic Gates ROHSSlkorLogic Gates
README
MFOS/panels/ANALOG/README.mdParts
51| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | DUS | FormantKO:DUS | D1, D2, D3, D4, D5 |
| 5 | MM2112 | FormantKO:DIP-16 | IC7, IC8, IC12, IC15, IC17 |
| 5 | OpAmp | FormantKO:DIP-8 | IC1, IC2, IC3, IC4, IC5 |
| 3 | 100k | FormantKO:R_Axial_Horizontal | R6, R12, R13 |
| 3 | 10k | FormantKO:Potentiometer_Trimmer | P1, P2, P3 |
| 3 | SN74125 | FormantKO:DIP-14 | IC11, IC14, IC16 |
| 2 | 10k | FormantKO:R_Axial_Horizontal | R1, R9 |
| 2 | 1k | FormantKO:R_Axial_Horizontal | R8, R10 |
| 2 | 470k | FormantKO:R_Axial_Horizontal | R7, R11 |
| 2 | 47k | FormantKO:R_Axial_Horizontal | R4, R5 |
| 2 | CD4024 | FormantKO:DIP-14 | IC10, IC13 |
| 2 | CD4049 | FormantKO:DIP-16 | IC9, IC25 |
| 2 | CardBracket | FormantKO:CardBracket | MH1, MH2 |
| 1 | 100n | FormantKO:C_Rect | C5 |
| 1 | 10µ | FormantKO:CP_Axial_600 | C4 |
| 1 | 1M | FormantKO:R_Axial_Horizontal | R3 |
| 1 | 1n | FormantKO:C_Rect | C3 |
| 1 | 220n | FormantKO:C_Rect | C1 |
| 1 | 27k | FormantKO:R_Axial_Horizontal | R2 |
| 1 | 47p | FormantKO:C_Rect | C2 |
| 1 | CD4011 | FormantKO:DIP-14 | IC20 |
| 1 | CV SRC | FormantKO:PanelConnector_1x03 | S2 |
| 1 | CardConnector | FormantKO:CardConnector | J1 |
| 1 | ECV | FormantKO:PanelConnector_1x02 | J2 |
| 1 | KOV SELECT | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J3 |
| 1 | ZN425E-8 | FormantKO:DIP-16 | IC6 |
Questions
How big is the SEQUENCER PCB?
It measures 160 × 233.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SEQUENCER use?
51 parts, built around the CD4049BD, CD4024BF and CD4011. 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 SEQUENCER KiCad files?
From the Desval27/FormantKO repository on GitHub, at the commit this page was made from: the board is modules/SEQUENCER/SEQUENCER.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the SEQUENCER 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).
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