Vco core
About the Vco core PCB
Vco core is an open source PCB design by shmoergh, published on GitHub. It is a 2-layer board measuring 58 × 110 mm, with 116 components from 52 distinct parts.
Other key parts include the TL072, LM311 and CD4040BM96. By type, the board carries 55 resistors, 25 capacitors, 9 ICs, 7 transistors, 7 connectors and 5 diodes.
It belongs with the audio and sensors designs in this gallery.
From the project
Fully analog DIY-friendly modular synth
Eurorack compatible VCO for the Shmøergh Moduleur.
- Raw saw generator with classic waveshaper circuits. Triangle, saw and square outputs - Sub oscillator and noise circuit (can be selected with a jumper) - Pulse width voltage control for square wave - Precision for about 7 octaves - Hard sync input - FM input - Two temperature compensation options for flexible DIY build (one is THT only) - Designed from very common electronic components
Main components on the Vco core
Vco core bill of materials (BOM)
116 components, 52 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 7 | TL072 JLCPCB | SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U4, U5, U6, U7, U8 |
| 1 | LM311 JLCPCB | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | CD4040BM96 JLCPCB | SOIC-16_3.9x9.9mm_P1.27mm | U9 |
| 1 | BC847BS JLCPCB | SOT-363_SC-70-6 | Q1 |
| 1 | MMBT3906 JLCPCB | SOT-23 | Q2 |
| 1 | J111 Mouser | TO-92_Inline_Wide | Q3 |
| 1 | MMBFJ111 JLCPCB | SOT-23 | Q4 |
| 2 | MMBT5551 JLCPCB | SOT-23 | Q5, Q7 |
| 1 | BC847 JLCPCB | SOT-23 | Q6 |
| 1 | CONN_01X04 Conn_01x04 Mouser | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | CONN_02X05_ODD_EVEN Conn_02x05_Odd_Even Mouser | PinHeader_2x05_P2.54mm_Vertical | J2 |
| 1 | CONN_02X05_ODD_EVEN Conn_02x05_Odd_Even Mouser | IDC-Header_2x05_P2.54mm_Horizontal | J3 |
| 1 | CONN_01X02 Conn_01x02 Mouser | PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | CONN_02X03_ODD_EVEN Conn_02x03_Odd_Even Mouser | PinHeader_2x03_P2.54mm_Vertical | J5 |
| 1 | CONN_02X02_COUNTER_CLOCKWISE Conn_02x02_Counter_Clockwise Mouser | PinHeader_2x02_P2.54mm_Vertical | J6 |
| 1 | CONN_01X07 Conn_01x07 Mouser | PinHeader_1x07_P2.54mm_Vertical | J8 |
| 1 | 10k (prec) | Potentiometer_Bourns_3006P_Horizontal | RV_SAW_BIAS1 |
| 2 | 100k (prec) | Potentiometer_Bourns_3006P_Horizontal | RV_TRI_BIAS1, R_BIAS1 |
| 1 | 2k (prec) | Potentiometer_Bourns_3006P_Horizontal | R_HIFREQ1 |
| 2 | See t.comp. table | Potentiometer_Bourns_3006P_Horizontal | R_WIDTH1, R_WIDTH2 |
Show 32 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | See t.comp. table Mouser | TO-92-2 | TH1 |
| 1 | PTS120602B100RP100 Mouser | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | TH2 |
| 3 | 1N4148 JLCPCB | D_SOD-123 | D1, D2, D3 |
| 2 | 1N5817 JLCPCB | D_SOD-323 | D6, D7 |
| 16 | 100N 100n JLCPCB | C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C13, C14 +8 |
| 1 | 100P 100p JLCPCB | C_0603_1608Metric | C8 |
| 1 | 2.2nF (foil) Mouser | C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C9 |
| 1 | 22P 22p JLCPCB | C_0603_1608Metric | C10 |
| 1 | 47P 47p JLCPCB | C_0603_1608Metric | C11 |
| 1 | 33P 33p JLCPCB | C_0603_1608Metric | C20 |
| 2 | 100U 100u JLCPCB | CP_Elec_6.3x7.7 | C23, C24 |
| 1 | 1u JLCPCB | C_0603_1608Metric | C28 |
| 1 | 470N 470n Mouser | C_Rect_L7.2mm_W3.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C29 |
| 16 | 100K 100k JLCPCB | R_0603_1608Metric | R1, R5, R15, R18, R21, R25, R27, R28 +8 |
| 2 | 150K 150k JLCPCB | R_0603_1608Metric | R2, R17 |
| 4 | See t.comp. table | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R6, R7, R8 |
| 3 | 1M JLCPCB | R_0603_1608Metric | R4, R10, R13 |
| 2 | 1.5K 1.5k JLCPCB | R_0603_1608Metric | R9, R11 |
| 1 | 510 JLCPCB | R_0603_1608Metric | R12 |
| 2 | 10K 10k JLCPCB | R_0603_1608Metric | R14, R47 |
| 1 | 22K 22k JLCPCB | R_0603_1608Metric | R16 |
| 1 | 330K 330k JLCPCB | R_0603_1608Metric | R19 |
| 2 | 2.2K 2.2k JLCPCB | R_0603_1608Metric | R20, R33 |
| 4 | 47K 47k JLCPCB | R_0603_1608Metric | R22, R32, R45, R46 |
| 2 | 15K 15k JLCPCB | R_0603_1608Metric | R23, R24 |
| 1 | 27K 27k JLCPCB | R_0603_1608Metric | R26 |
| 4 | 220K 220k JLCPCB | R_0603_1608Metric | R31, R34, R44, R56 |
| 1 | 2.2M JLCPCB | R_0603_1608Metric | R35 |
| 2 | 240K 240k JLCPCB | R_0603_1608Metric | R36, R39 |
| 1 | 680 JLCPCB | R_0603_1608Metric | R42 |
| 1 | 56K 56k JLCPCB | R_0603_1608Metric | R48 |
| 5 | 1k JLCPCB | R_0603_1608Metric | R50, R52, R53, R54, R55 |
Vco core design files
The KiCad project lives in the shmoergh/moduleur repository on GitHub; these links point at the commit this page was built from.
Vco core: common questions
How big is the Vco core PCB?
The Vco core measures 58 × 110 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Vco core?
116 components, from 52 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 core design files?
From the shmoergh/moduleur 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 core design in my own project?
The repository has no license, so all rights stay with shmoergh. Use it as a reference, and ask the author before reusing the design.
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