2 layers20 × 102.5 mm
MiniVCA 1.2 - Main
benjiaomodular/MiniVCA
A small footprint LM13700 VCA module for Eurorack modular synth
21 parts31MIT
2 layers64 × 128.5 mm
MiniVCA 1.0
benjiaomodular/MiniVCA31A small footprint LM13700 VCA module for Eurorack modular synth
- Size
- 64 × 128.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 28
- Pads
- 175
- Tracks, vias
- 153, 0
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 8 Dec 2021
- Updated
- 12 May 2022
Overview
MiniVCA 1.0 is an open-source printed circuit board by benjiaomodular, from the benjiaomodular/MiniVCA repository on GitHub, published under the MIT licence. It is a 2-layer board of 64 × 128.5 mm with 42 parts on 28 nets, routed with 153 tracks and 0 vias.
It is built around the LM13700M, TL072 and BC559. Its parts include 11 resistors, 8 capacitors, 8 connectors, 3 diodes and 2 ICs. It belongs with the audio and music boards of this library.
Main components
3
LM13700M
SOIC-16-16V~-4.75V、4.75V~16V 0℃~+70℃ 110dB 2 2.6mA 20mA 400nA 4mV 50V/us 600nA 9.5V~32V SOIC-16 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
BC559
TO-92-31 PNP 100mA 110 150MHz 15nA 30V 500mW 5V 650mV PNP Standalone TO-92-3 Bipolar (BJT) ROHSonsemiBipolar (BJT)
README
README.mdMiniVCA
An LM13700 VCA based on Juanito Moore's design. Check out his original circuit here: https://drive.google.com/file/d/1J9KlYRYUHS_VxaGyPMjCsaK7Lp2Q8HFu/view
Versions
1.2 (Unverified)
- Changed mounting hole spacing to Doepfer standards.
- Export separate gerber files for each board instead of mousebites.
1.1
- Minor corrections from initial print.
- Updated front panel graphics to my new standard styles.
1.0
Initial design.
Issues
- Socket for LM13700 was wrong. Used 10.16mm instead of 7.62mm width. Can be remedied by bending the IC's pins wide. Verified to work.
- No silk screen label for pots.
Issues
- Replaced footprint for LM13700 with correct one.
- Added silk screen labels for the pots.
- Move all front panel text to F.Mask layer.
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C3, C4, C7, C8 |
| 4 | 20k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R6, R8 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R11 |
| 3 | LED | LED_THT:LED_D3.0mm | D1, D2, D3 |
| 2 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R7 |
| 2 | 100k | benjiaomodular:Potentiometer_RV09 | RV1, RV2 |
| 2 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2 |
| 2 | 120pF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C5, C6 |
| 1 | 47k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 1 | 680 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10 |
| 1 | AudioIn | benjiaomodular:AudioJack_3.5mm | J3 |
| 1 | AudioOut | benjiaomodular:AudioJack_3.5mm | J4 |
| 1 | BC559 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1 |
| 1 | BOARD1_HEADERS | Connector_PinSocket_2.54mm:PinSocket_1x16_P2.54mm_Vertical | J7 |
| 1 | BOARD2_HEADERS | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | J8 |
| 1 | CV_1 | benjiaomodular:AudioJack_3.5mm | J2 |
| 1 | CV_2 | benjiaomodular:AudioJack_3.5mm | J1 |
| 1 | IDC_BUS | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J6 |
| 1 | JST_BUS | Connector_JST:JST_XH_B6B-XH-A_1x06_P2.50mm_Vertical | J5 |
| 1 | LM13700 | Package_DIP:DIP-16_W10.16mm_LongPads | U1 |
| 1 | TL072 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U2 |
The 35 most common of 42 parts.
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Questions
How big is the MiniVCA 1.0 PCB?
It measures 64 × 128.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MiniVCA 1.0 use?
42 parts, built around the LM13700M, TL072 and BC559. 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 MiniVCA 1.0 KiCad files?
From the benjiaomodular/MiniVCA repository on GitHub, at the commit this page was made from: the board is KiCad/MiniVCA 1.0/MiniVCA 1.0.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the MiniVCA 1.0 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).