4 layers163 × 116.5 mm
4 layers46 × 113 mm
VCO
gehel/synth- Size
- 46 × 113 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 96
- Nets
- 71
- Pads
- 272
- Tracks, vias
- 314, 1
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Oct 2023
- Updated
- 2 May 2026
Overview
VCO is an open-source printed circuit board by gehel, from the gehel/synth repository on GitHub. It is a 4-layer board of 46 × 113 mm with 96 parts on 71 nets, routed with 314 tracks and 1 via.
It is built around the TL072, LM13700M and PN4391. Its parts include 47 resistors, 17 capacitors, 8 diodes, 6 ICs and 4 connectors.
Main components
3
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
LM13700M
SOIC-16-16V~-4.75V、4.75V~16V 0℃~+70℃ 110dB 2 2.6mA 20mA 400nA 4mV 50V/us 600nA 9.5V~32V SOIC-16 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierPN4391
TO-92-3-55℃~+150℃ 1 N-channel 14pF 30Ω 350mW 4V 50mA N-Channel TO-92-3 JFETs ROHSonsemiJFETs
Parts
96| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R5, R6, R7, R8, R12, R18, R19, R27, R34, R44, R45 |
| 10 | 10K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16, R21, R22, R28, R32, R33, R37, R40, R46, R48 |
| 8 | 1N914 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 |
| 5 | 100nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C7, C10, C11, C16, C17 |
| 5 | 1K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R25, R30, R35, R38, R43 |
| 5 | 1M | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R14, R17, R24, R36 |
| 3 | 100K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | HFTRIM1, SINBIAS1, SINSHAPE1 |
| 3 | 100pF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C5 |
| 3 | 20K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R29, R41, R42 |
| 3 | 4.7K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R39, R49 |
| 3 | TestPoint | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP1, TP2, TP3 |
| 2 | 10K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RMPOFST1, TRIOFST1 |
| 2 | 10uF | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C8, C9 |
| 2 | 1uF | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C13, C14 |
| 2 | 2K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R23 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2 |
| 2 | TL072 | Package_DIP:DIP-8_W7.62mm_LongPads | U2, U5 |
| 1 | 100R | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | VOTRIM1 |
| 1 | 10M | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R47 |
| 1 | 10pF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C15 |
| 1 | 130K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R51 |
| 1 | 18K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R20 |
| 1 | 1M | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | SINLVL1 |
| 1 | 1nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C4 |
| 1 | 2nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C12 |
| 1 | 3K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R50 |
| 1 | 4.7pF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C6 |
| 1 | 470K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R26 |
| 1 | 475R | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
| 1 | 47K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R31 |
| 1 | 5nF | Capacitor_THT:C_Radial_D5.0mm_H11.0mm_P2.00mm | C3 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J19 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J15 |
| 1 | Conn_01x11 | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J17 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J13 |
| 1 | LM13700 | Package_DIP:DIP-16_W7.62mm_LongPads | U4 |
| 1 | OP275 | Package_DIP:DIP-8_W7.62mm_LongPads | U1 |
| 1 | PN4391 | Package_TO_SOT_THT:TO-92L_HandSolder | Q2 |
| 1 | SSM2210 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | TL071 | Package_DIP:DIP-8_W7.62mm_LongPads | U6 |
| 1 | TL074 | Package_DIP:DIP-14_W7.62mm_LongPads | U3 |
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Questions
How big is the VCO PCB?
It measures 46 × 113 mm and has 4 copper layers, 1.6 mm thick.
What parts does the VCO use?
96 parts, built around the TL072, LM13700M and PN4391. 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 VCO KiCad files?
From the gehel/synth repository on GitHub, at the commit this page was made from: the board is VCO/VCO/VCO.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the VCO design in my own project?
Its repository states no licence, so its author keeps all rights: ask gehel before reusing the design.