VCO
About the VCO PCB
VCO is an open source PCB design by Desval27, published on GitHub under the MIT license. It is a 2-layer board measuring 160 × 233.4 mm, with 129 components from 84 distinct parts.
Other key parts include the 7413, LM723 and OpAmp. By type, the board carries 59 resistors, 22 connectors, 13 capacitors, 11 ICs, 8 transformers and 8 diodes.
It belongs with the audio designs in this gallery.
From the project
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.
- Schematic - Assembly - Interactive Bill of Materials
- Default - Elecrow - FusionPCB - JLCPCB - PCBWay
Main components on the VCO
VCO bill of materials (BOM)
129 components, 84 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 7413 | DIP-14 | IC1 |
| 1 | LM723 OpAmp | DIP-8 | IC2 |
| 1 | LM723 µA726 | TO-100 | IC3 |
| 8 | OpAmp | DIP-8 | IC4, IC5, IC6, IC7, IC8, IC9, IC10, IC11 |
| 1 | Card_Connector | CardConnector | J1 |
| 1 | KOV SELECT | Jumper_1x03 | J2 |
| 1 | IOS SELECT | PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | FM | PanelConnector_1x02 | J5 |
| 1 | ECV | PanelConnector_1x02 | J6 |
| 1 | PWM | PanelConnector_1x02 | J7 |
| 1 | EOS | PanelConnector_1x02 | J8 |
| 2 | 2K5 100k | PanelConnector_1x03 | P1, P2 |
| 1 | 2K5 50k | PanelConnector_1x03 | P3 |
| 1 | 100k | PanelConnector_1x03 | P4 |
| 1 | 10k | PanelConnector_1x03 | P5 |
| 1 | 4k7 | PanelConnector_1x03 | P6 |
| 1 | 200R | Potentiometer_Trimmer_MultiTurn_Horizontal | P7 |
| 5 | 100k | Potentiometer_Trimmer | P8, P11, P13, P14, P15 |
| 1 | 2k2 | Potentiometer_Trimmer | P9 |
| 1 | 4k7 | Potentiometer_Trimmer | P10 |
Show 64 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10k | Potentiometer_Trimmer | P12 |
| 2 | CardBracket | CardBracket | MH1, MH2 |
| 1 | MODE | PanelConnector_1x03 | S1 |
| 1 | SQUARE | PanelConnector_1x03 | S2 |
| 1 | SPACED SAW | PanelConnector_1x03 | S3 |
| 1 | SAW | PanelConnector_1x03 | S4 |
| 1 | TRIANGLE | PanelConnector_1x03 | S5 |
| 1 | SINE | PanelConnector_1x03 | S6 |
| 1 | 2N3055 TUN | TO-18 | T1 |
| 2 | 2N3055 N-FET | TO-92 | T2, T3 |
| 4 | TUN | TO-18 | T4, T5, T6, T7 |
| 1 | TUP | TO-18 | T8 |
| 2 | 1N4002 DUS | DUS | D1, D2 |
| 1 | 1N4002 DUG | DUG | D3 |
| 1 | DUG | DUG | D4 |
| 3 | DUS | DUS | D5, D6, D7 |
| 1 | PW LED | PanelConnector_1x02 | D8 |
| 2 | 1n | C_Rect_300 | C1, C13 |
| 1 | 3n3 | C_Rect_300 | C2 |
| 3 | 100N 680n | C_Rect_300 | C3, C4, C12 |
| 4 | 680n | C_Rect_300 | C5, C6, C7, C8 |
| 1 | 100N 47µ | CP_Axial_600 | C9 |
| 1 | 100µ | CP_Axial_1000 | C10 |
| 1 | 100N 100µ | CP_Axial_1000 | C11 |
| 1 | 3K9 150k | R_Axial_Horizontal | R1 |
| 1 | 3K9 100k | R_Axial_Horizontal | R2 |
| 1 | 2R7 150k | R_Axial_Horizontal | R3 |
| 1 | 2R7 100R | R_Axial_Horizontal | R4 |
| 1 | 2R7 47k | R_Axial_Horizontal | R5 |
| 1 | 2R7 2k37 | R_Axial_Horizontal | R6 |
| 1 | 1k5 | R_Axial_Horizontal | R7 |
| 1 | 750R | R_Axial_Horizontal | R8 |
| 2 | 22K 100k | R_Axial_Horizontal | R9, R10 |
| 2 | 6K8 1M | R_Axial_Horizontal | R11, R14 |
| 1 | 6K8 68k | R_Axial_Horizontal | R12 |
| 1 | 6K8 200k | R_Axial_Horizontal | R13 |
| 1 | 680R 330R | R_Axial_Horizontal | R15 |
| 1 | 680R 4k7 | R_Axial_Horizontal | R16 |
| 1 | 2K7 12k | R_Axial_Horizontal | R17 |
| 1 | 8K2 1k78 | R_Axial_Horizontal | R18 |
| 1 | 2R7 1k | R_Axial_Horizontal | R19 |
| 1 | 2R7 12k | R_Axial_Horizontal | R20 |
| 1 | 2K2 33k | R_Axial_Horizontal | R21 |
| 1 | 2K7 22k | R_Axial_Horizontal | R22 |
| 1 | 15K 120k | R_Axial_Horizontal | R23 |
| 1 | 150R 47k | R_Axial_Horizontal | R24 |
| 1 | 12k | R_Axial_Horizontal | R25 |
| 1 | 120k | R_Axial_Horizontal | R26 |
| 1 | 180k | R_Axial_Horizontal | R27 |
| 2 | 5k6 | R_Axial_Horizontal | R28, R29 |
| 1 | 4k7 | R_Axial_Horizontal | R30 |
| 4 | 1k | R_Axial_Horizontal | R31, R35, R38, R40 |
| 3 | 47R | R_Axial_Horizontal | R32, R33, R34 |
| 7 | 10k | R_Axial_Horizontal | R36, R47, R48, R49, R50, R51, R52 |
| 1 | 330k | R_Axial_Horizontal | R37 |
| 2 | 22k | R_Axial_Horizontal | R39, R55 |
| 2 | 3k9 | R_Axial_Horizontal | R41, R46 |
| 2 | 150k | R_Axial_Horizontal | R42, R43 |
| 3 | 100k | R_Axial_Horizontal | R44, R56, R57 |
| 1 | 470R | R_Axial_Horizontal | R45 |
| 1 | 180R | R_Axial_Horizontal | R53 |
| 1 | 220k | R_Axial_Horizontal | R54 |
| 1 | 68k | R_Axial_Horizontal | R58 |
| 1 | 15k | R_Axial_Horizontal | R59 |
VCO design files
The KiCad project lives in the Desval27/FormantKO repository on GitHub; these links point at the commit this page was built from.
- Layoutmodules/VCO/VCO.kicad_pcb
- Schematicmodules/VCO/VCO.kicad_sch
- BOMsystem/PSU/bom/bom.csv
VCO: common questions
How big is the VCO PCB?
The VCO measures 160 × 233.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the VCO?
129 components, from 84 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 VCO design files?
From the Desval27/FormantKO 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 VCO design in my own project?
Yes, under the terms of its MIT license, which Desval27 chose for the repository.
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