2 layers73 × 78.1 mm
Pan Mix A
clarionut/YuSynth-Panning-Mixer-Output
An extensible version of the YuSynth Output mixer & VC-panner, minus the tone control circuitry
98 parts
2 layers40 × 100 mm
Vca-1
xdylanm/vca-module1A dual VCA module based on the LM13700 OTA in a Eurorack format.
- Size
- 40 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 45
- Pads
- 148
- Tracks, vias
- 205, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Jun 2025
- Updated
- 5 Nov 2025
Overview
Vca-1 is an open-source printed circuit board by xdylanm, from the xdylanm/vca-module repository on GitHub, published under the MIT licence. It is a 2-layer board of 40 × 100 mm with 49 parts on 45 nets, routed with 205 tracks and 2 vias.
It is built around the LM13700M and BC557. Its parts include 20 resistors, 10 capacitors, 7 connectors, 4 diodes and 2 ICs.
Main components
2README
README.mdDual VCA
A dual VCA module based on the LM13700 OTA in a Eurorack format.
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100n | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C3, C4, C5, C7, C8, C9 |
| 4 | 100k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R1, R4, R10, R13 |
| 4 | 220R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R5, R7, R14, R16 |
| 3 | 100k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3, R6, R12 |
| 2 | 100k | Potentiometer_THT:Potentiometer_Bourns_PTV09A-2_Single_Horizontal | RV3, RV4 |
| 2 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 2 | 10R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R19, R20 |
| 2 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C6, C10 |
| 2 | 12k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R2, R11 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 2 | 1k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9, R18 |
| 2 | 220p | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2 |
| 2 | 49k9 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R8, R17 |
| 2 | AUDIO IN | AudioJacks:Jack_3.5mm_QingPu_WQP-PJ323M_Horizontal | J2, J5 |
| 2 | BC557 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q2 |
| 2 | D_Schottky | Diode_THT:D_DO-41_SOD81_P2.54mm_Vertical_KathodeUp | D3, D4 |
| 2 | LIN CV IN | AudioJacks:Jack_3.5mm_QingPu_WQP-PJ323M_Horizontal | J1, J4 |
| 2 | OUT | AudioJacks:Jack_3.5mm_QingPu_WQP-PJ323M_Horizontal | J3, J6 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | J7 |
| 1 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | TL074 | Package_DIP:DIP-14_W7.62mm_Socket | U1 |
Questions
How big is the Vca-1 PCB?
It measures 40 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Vca-1 use?
49 parts, built around the LM13700M and BC557. 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 Vca-1 KiCad files?
From the xdylanm/vca-module repository on GitHub, at the commit this page was made from: the board is hardware/vca-1/vca-1.kicad_pcb and its schematic hardware/vca-1/vca-1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Vca-1 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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