VCO
About the VCO PCB
VCO is an open source PCB design by VincentPeters, published on GitHub. It is a 2-layer board measuring 37 × 113.9 mm, with 104 components from 50 distinct parts.
Other key parts include the OP275, TL072, SSM2212, TL074 and LM13700. By type, the board carries 50 resistors, 17 capacitors, 10 connectors, 8 diodes, 7 ICs and 1 transistor.
It belongs with the audio designs in this gallery.
From the project
Collection of files about diy synth making, mostly eurorack format.
https://github.com/nickajeglin/Eurorack-pcbs
Main components on the VCO
VCO bill of materials (BOM)
104 components, 50 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | OP275 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 2 | TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U2, U6 |
| 1 | SSM2212 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | TL074 | SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | LM13700 | SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | TL071 | SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | PN4391 | TO-92 | Q1 |
| 1 | SYNC | 3.5mm_tip_switch_thonkiconn | J1 |
| 1 | PWM | 3.5mm_tip_switch_thonkiconn | J2 |
| 1 | LIN | 3.5mm_tip_switch_thonkiconn | J3 |
| 1 | CV1 | 3.5mm_tip_switch_thonkiconn | J4 |
| 1 | CV2 | 3.5mm_tip_switch_thonkiconn | J5 |
| 1 | CV3 | 3.5mm_tip_switch_thonkiconn | J6 |
| 1 | SIN | 3.5mm_tip_switch_thonkiconn | J7 |
| 1 | TRI | 3.5mm_tip_switch_thonkiconn | J8 |
| 1 | RMP | 3.5mm_tip_switch_thonkiconn | J9 |
| 1 | SQR | 3.5mm_tip_switch_thonkiconn | J10 |
| 1 | Conn_02x05_Odd_Even | IDC-Header_2x05_P2.54mm_Vertical | PWR1 |
| 3 | 100k lin | Potentiometer_Thonk_Alpha_9mm_Vertical | RV2, RV3, RV39 |
| 2 | 10K | Potentiometer_Bourns_3296W_Vertical | RV5, RV7 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100K | Potentiometer_Bourns_3296W_Vertical | RV11, RV60, RV64 |
| 1 | 100 | Potentiometer_Bourns_3296W_Vertical | RV16 |
| 1 | 1M | Potentiometer_Bourns_3296W_Vertical | RV59 |
| 8 | 1N914 | D_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D1, D2, D3, D4, D5, D6, D7, D8 |
| 3 | 0.1uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C2, C8 |
| 3 | 100pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C3, C17, C19 |
| 1 | 10pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C4 |
| 1 | 0.001uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C5 |
| 1 | 0.005uF mica, polycarb, or polysty | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C6 |
| 2 | 10uF 25V electro | CP_Elec_5x4.5 | C7, C10 |
| 2 | 1uF 25V tant | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C12, C13 |
| 1 | 0.002uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C14 |
| 2 | .1uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C15, C16 |
| 1 | 4.7pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C18 |
| 11 | 10K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R12, R13, R17, R25, R32, R35, R40 +3 |
| 11 | 100k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R6, R10, R15, R18, R23, R29, R31, R44 +3 |
| 5 | 1M | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R8, R28, R30, R45, R69 |
| 3 | 4.7K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R9, R36, R52 |
| 3 | 20K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R14, R21, R48 |
| 1 | 475 | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R19 |
| 2 | 47K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R20, R65 |
| 5 | 1K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R22, R26, R34, R49, R51 |
| 1 | 2K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24 |
| 1 | 3K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R41 |
| 1 | 2K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R46 |
| 1 | 130K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R53 |
| 2 | 200k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R56, R57 |
| 1 | 470K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R61 |
| 1 | 10M | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R68 |
| 1 | 18K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R70 |
VCO design files
The KiCad project lives in the VincentPeters/Diy-Synth-Eurorack repository on GitHub; these links point at the commit this page was built from.
VCO: common questions
How big is the VCO PCB?
The VCO measures 37 × 113.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the VCO?
104 components, from 50 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 VincentPeters/Diy-Synth-Eurorack repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the VCO design in my own project?
The repository has no license, so all rights stay with VincentPeters. Use it as a reference, and ask the author before reusing the design.
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