2 layers148 × 84.5 mm
Panel daisy
ohmtech-rdi/eurorack-blocks
Software to Hardware Prototyping for Eurorack using C++, Max/Gen~ or Faust
259 parts410
2 layers95.5 × 55 mm
Vca 1
hermflink/3330VCA5Kicad project files of a AS3330 based dual VCA
- Size
- 95.5 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 66
- Nets
- 45
- Pads
- 171
- Tracks, vias
- 542, 19
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 8 Nov 2019
- Updated
- 8 Nov 2019
Overview
Vca 1 is an open-source printed circuit board by hermflink, from the hermflink/3330VCA repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 95.5 × 55 mm with 66 parts on 45 nets, routed with 542 tracks and 19 vias.
It is built around the TL072. Its parts include 30 resistors, 17 capacitors, 8 connectors and 3 ICs. It belongs with the audio and music boards of this library.
Main components
1README
README.md3330VCA
Kicad project files of a AS3330 based dual VCA. Part of a modular DIY synth project, other modules are available in other repositories. Not entirely compatible with a CEM3330 as this would require a diode to ground on pin 4.
Used the Audio.lib from https://kicad.github.io/symbols/Audio to extend the Kicad library for the AS3330 component.
Designed to work with +/- 15V, not tested for +/- 12V
The PCB is 9.5 x 5.5 cm and has no PCB-mounting of potmeters, switches, jacks; these are all connected by pin header connectors
The PCB has a fault: the connection between pin 5 and 8 of AS3330 on the backplane should be removed. Instead, pin 5 should be connected to R15/R17 as the schema points out.
Loosely based on http://www.digisound80.co.uk/digisound/modules/80-9_files/80-9_ETI.pdf
R4, C2, R18 and C8 can be safely left out.
Parts
66| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 51K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2, R3, R9, R23, R24, R25, R29, R30 |
| 7 | 100nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C7, C12, C13, C14, C15, C16, C17 |
| 6 | 100K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R5, R12, R16, R26, R28 |
| 6 | 1K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R4, R10, R13, R14, R18, R22 |
| 4 | Connectors:1pin | , , , | |
| 4 | 10nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C4, C8, C10 |
| 4 | 150K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R6, R7, R19, R21 |
| 4 | JACK_2P | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J2, J3, J5, J6 |
| 3 | CONN_01X04 | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | J1, J4, J8 |
| 2 | 100 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R8, R20 |
| 2 | 100K | Potentiometers:Potentiometer_Trimmer_Bourns_3296W | RV2, RV3 |
| 2 | 100k | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | RV1, RV4 |
| 2 | 1nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C3, C9 |
| 2 | 220nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C6 |
| 2 | 33K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R11, R27 |
| 2 | 5nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C5, C11 |
| 2 | TL072 | Housings_DIP:DIP-8_W7.62mm_Socket_LongPads | U1, U3 |
| 1 | 680 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R17 |
| 1 | 6K8 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R15 |
| 1 | AS3330 | Housings_DIP:DIP-18_W7.62mm_Socket_LongPads | U2 |
| 1 | CONN_01X03_MALE | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J7 |
Questions
How big is the Vca 1 PCB?
It measures 95.5 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Vca 1 use?
66 parts, built around the TL072. 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 hermflink/3330VCA repository on GitHub, at the commit this page was made from: the board is vca 1.kicad_pcb. 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 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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