

Voltage Controlled State Variable Filter for Eurorack
- Size
- 55 × 105 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 57
- Nets
- 41
- Pads
- 174
- Tracks, vias
- 251, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 14 May 2022
- Updated
- 16 Jun 2022
Overview
VCF1 is an open-source printed circuit board by gueldenstone, from the gueldenstone/VCF repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 55 × 105 mm with 57 parts on 41 nets, routed with 251 tracks and 0 vias.
It is built around the CA3080A and TL084. Its parts include 26 resistors, 16 capacitors, 5 connectors and 4 ICs.
Main components
2CA3080A
TO-99-8Programmable gain mode Transconductance Amplifier TO-99-8 Special Purpose AmplifiersRochester Electronics, LLCSpecial Purpose AmplifiersTL084
SOP-14-18V~18V 0℃~+70℃ 1.4mA 16V/us 20nA 3mV 4MHz 4nA 60mA 75dB Four channels Short-Circuit Protection、Built-in compensation SOP-14 FET Input Amplifiers ROHSGcoreOperational Amplifier
README
README.mdVCF
Voltage Controlled State Variable Filter for Eurorack
Parts
57| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 20k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R7, R8, R9, R12, R14, R16, R19, R20, R22, R23, R25, R26, R27 |
| 8 | 100nF | Capacitor_THT:C_Rect_L7.2mm_W3.0mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C6, C7, C8, C9, C10, C11, C12, C13 |
| 8 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R6, R11, R15, R24, R28 |
| 4 | 100k | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV1, RV2, RV3, RV4 |
| 4 | 1uF | Capacitor_THT:C_Rect_L7.2mm_W4.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C2, C3, C14 |
| 2 | 10nF | Capacitor_THT:C_Rect_L7.2mm_W3.0mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C15, C16 |
| 2 | 10uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C4, C5 |
| 2 | 15k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R10 |
| 2 | 200R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R13, R21 |
| 2 | CA3080 | Package_DIP:DIP-8_W7.62mm_Socket | U3, U4 |
| 2 | TL084 | Package_DIP:DIP-14_W7.62mm_Socket | U1, U2 |
| 1 | AUDIO_IN | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | BP_OUT | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | CV_IN | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J1 |
| 1 | HP_OUT | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H2 |
| 1 | PIN_HEADER_2x5 | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | H1 |
| 1 | TP_OUT | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
Questions
How big is the VCF1 PCB?
It measures 55 × 105 mm and has 2 copper layers, 1.6 mm thick.
What parts does the VCF1 use?
57 parts, built around the CA3080A and TL084. 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 VCF1 KiCad files?
From the gueldenstone/VCF repository on GitHub, at the commit this page was made from: the board is VCF1.kicad_pcb and its schematic VCF.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the VCF1 design in my own project?
Its repository publishes it under the GPL-3.0 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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