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
DELAYED MOD
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
- 101
- Nets
- 74
- Pads
- 256
- Tracks, vias
- 271, 5
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 May 2026
- Updated
- 28 Aug 2026
Overview
DELAYED MOD 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 101 parts on 74 nets, routed with 271 tracks and 5 vias.
It is built around the LM13700M and TL072. Its parts include 44 resistors, 22 crystals, 9 capacitors, 9 connectors and 6 diodes. It belongs with the audio and music boards of this library.
Main components
2README
MFOS/panels/ANALOG/README.mdParts
101| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | WireConnector | FormantKO:Wire_1x01_D40mil_OD80mil | X1, X2, X3, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19, X20, X21, X22 +6 |
| 5 | 100k | FormantKO:R_Axial_Horizontal_P500mil | R15, R19, R20, R31, R41 |
| 5 | 1N4148 | FormantKO:DO-35_P400mil | D1, D2, D3, D4, D5 |
| 5 | 47k | FormantKO:R_Axial_Horizontal_P500mil | R12, R18, R24, R28, R44 |
| 4 | 100n | FormantKO:C_Rect_P200mil | C3, C4, C7, C8 |
| 4 | 3k | FormantKO:R_Axial_Horizontal_P500mil | R6, R16, R22, R37 |
| 3 | 10k | FormantKO:R_Axial_Horizontal_P500mil | R1, R4, R26 |
| 3 | 4k7 | FormantKO:R_Axial_Horizontal_P500mil | R27, R34, R36 |
| 3 | MonoJack | FormantKO:PanelConnector_1x02 | J2, J3, J4 |
| 2 | 100k | FormantKO:PanelConnector_1x03 | R21, R23 |
| 2 | 100k | FormantKO:Potentiometer_Trimmer_MultiTurn | R38, R42 |
| 2 | 10µ | FormantKO:CP_Radial_P100mil | C6, C9 |
| 2 | 1M | FormantKO:R_Axial_Horizontal_P500mil | R8, R13 |
| 2 | 1M | FormantKO:PanelConnector_1x03 | R5, R11 |
| 2 | 1N5231 | FormantKO:DO-35_P400mil | Z1, Z2 |
| 2 | 200K | FormantKO:R_Axial_Horizontal_P500mil | R32, R43 |
| 1 | +15V | FormantKO:Wire_1x01_D40mil_OD80mil | J8 |
| 1 | -15V | FormantKO:Wire_1x01_D40mil_OD80mil | J10 |
| 1 | 15k | FormantKO:R_Axial_Horizontal_P500mil | R39 |
| 1 | 18k | FormantKO:R_Axial_Horizontal_P500mil | R40 |
| 1 | 1K | FormantKO:R_Axial_Horizontal_P500mil | R33 |
| 1 | 1k | FormantKO:R_Axial_Horizontal_P500mil | R10 |
| 1 | 1k8 | FormantKO:R_Axial_Horizontal_P500mil | R35 |
| 1 | 200k | FormantKO:R_Axial_Horizontal_P500mil | R7 |
| 1 | 220Ω | FormantKO:R_Axial_Horizontal_P500mil | R17 |
| 1 | 22n | FormantKO:C_Rect_P200mil | C5 |
| 1 | 2N3904 | FormantKO:TO-92_Wide | Q3 |
| 1 | 2N3906 | FormantKO:TO-92_Wide | Q1 |
| 1 | 2N5457 | FormantKO:TO-92_Wide | Q2 |
| 1 | 2n2 | FormantKO:C_Rect_P200mil | C2 |
| 1 | 30k | FormantKO:R_Axial_Horizontal_P500mil | R9 |
| 1 | 39k | FormantKO:R_Axial_Horizontal_P500mil | R14 |
| 1 | 3k9 | FormantKO:R_Axial_Horizontal_P500mil | R3 |
| 1 | 4µ7 | FormantKO:CP_Radial_Tantal_P200mil | C1 |
| 1 | 56k | FormantKO:R_Axial_Horizontal_P500mil | R30 |
| 1 | 5k6 | FormantKO:R_Axial_Horizontal_P500mil | R25 |
| 1 | 7k5 | FormantKO:R_Axial_Horizontal_P500mil | R29 |
| 1 | 91k | FormantKO:R_Axial_Horizontal_P500mil | R2 |
| 1 | Card Bracket | FormantKO:Card_Bracket | MH1 |
| 1 | Card Connector | FormantKO:Card_Connector | J1 |
| 1 | DLED | FormantKO:PanelConnector_1x02 | LED1 |
| 1 | GATE | FormantKO:PanelConnector_1x03 | J6 |
| 1 | GATE SELECT | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J7 |
| 1 | GND | FormantKO:Wire_1x01_D40mil_OD80mil | J9 |
| 1 | LM13700 | FormantKO:DIP-16N | U2 |
| 1 | SW | FormantKO:PanelConnector_1x03 | S4 |
| 1 | TL072 | FormantKO:DIP-8N | U3 |
| 1 | TL074 | FormantKO:DIP-14N | U1 |
| 1 | WAVE SELECT | FormantKO:PanelConnector_1x04 | S2 |
Questions
How big is the DELAYED MOD PCB?
It measures 160 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DELAYED MOD use?
101 parts, built around the LM13700M and TL072. 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 DELAYED MOD KiCad files?
From the Desval27/FormantKO repository on GitHub, at the commit this page was made from: the board is MFOS/modules/DELAYED_MOD/DELAYED_MOD.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the DELAYED MOD 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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