2 layers60.3 × 128.3 mm
2 layers70.5 × 128.3 mm
Bare VCA II
Blinken-Lights/ASCII50ASCII Modular hardware and software repo
- Size
- 70.5 × 128.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 206
- Nets
- 151
- Pads
- 546
- Tracks, vias
- 884, 55
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210228)
- Created
- 25 May 2021
- Updated
- 23 May 2025
Overview
Bare VCA II is an open-source printed circuit board by Blinken-Lights, from the Blinken-Lights/ASCII repository on GitHub, published under the MIT licence. It is a 2-layer board of 70.5 × 128.3 mm with 206 parts on 151 nets, routed with 884 tracks and 55 vias.
It is built around the LM13700M, MMBT3906 and 1N4148WS. Its parts include 94 resistors, 22 capacitors, 16 diodes, 12 transistors and 7 ICs.
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
MMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
README
Daemon/hardware/README.mdKiCad files
Parts
206| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | 100k | Resistor_SMD:R_0805_2012Metric | R1, R2, R12, R15, R17, R18, R21, R25, R28, R30, R31, R34, R38, R41, R43, R44 +24 |
| 19 | Thonkiconn | kicad_libraries:Thonkiconn | CVJ1, CVJ2, CVJ3, CVJ4, CVJ5, CVJ6, MasterOut1, OutJ1, OutJ2, OutJ3, OutJ4, OutJ5, OutJ6, SigJ1, SigJ2, SigJ3 +3 |
| 14 | 100n | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C7, C8, C9, C10, C13, C14, C15, C16, C21, C22 |
| 12 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | Null1, Null2, Null3, Null4, Null5, Null6, Reject1, Reject2, Reject3, Reject4, Reject5, Reject6 |
| 12 | 220 | Resistor_SMD:R_0805_2012Metric | R3, R4, R19, R20, R32, R33, R45, R46, R58, R59, R71, R72 |
| 12 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12 |
| 7 | 100k | Potentiometer_THT:Potentiometer_GND_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | MasterVol1, Vol1, Vol2, Vol3, Vol4, Vol5, Vol6 |
| 7 | 1k | Resistor_SMD:R_0805_2012Metric | R13, R26, R39, R52, R65, R78, R91 |
| 6 | 1N4148WS | Diode_SMD:D_SOD-323_HandSoldering | D1, D3, D5, D7, D9, D11 |
| 6 | 200k | Resistor_SMD:R_0805_2012Metric | R7, R16, R29, R42, R55, R68 |
| 6 | 22k | Resistor_SMD:R_0805_2012Metric | R10, R23, R36, R49, R62, R75 |
| 6 | 270k | Resistor_SMD:R_0805_2012Metric | R9, R22, R35, R48, R61, R74 |
| 6 | 47p | Capacitor_SMD:C_0805_2012Metric | C5, C6, C11, C12, C17, C18 |
| 6 | 560 | Resistor_SMD:R_0805_2012Metric | R11, R24, R37, R50, R63, R76 |
| 6 | 68k | Resistor_SMD:R_0805_2012Metric | R5, R14, R27, R40, R53, R66 |
| 4 | Blue LED | LED_THT:LED_D3.0mm | D4, D8, D12, D16 |
| 4 | Red LED | LED_THT:LED_D3.0mm | D2, D6, D10, D15 |
| 4 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2, U3, U5, U7 |
| 3 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1, U4, U6 |
| 3 | LOGO | kicad_libraries:OUT | G***, G***, G*** |
| 3 | LOGO | kicad_libraries:CV | G***, G***, G*** |
| 3 | LOGO | kicad_libraries:IN | G***, G***, G*** |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R93, R94 |
| 2 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C19, C20 |
| 2 | 1N5817 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D13, D14 |
| 1 | 330k | Resistor_SMD:R_0805_2012Metric | R90 |
| 1 | 33k | Resistor_SMD:R_0805_2012Metric | R85 |
| 1 | 820k | Resistor_SMD:R_0805_2012Metric | R88 |
| 1 | LOGO | kicad_libraries:cat | G*** |
| 1 | LOGO | kicad_libraries:ASCII mid size | G*** |
| 1 | LOGO | kicad_libraries:Bare VCA | G*** |
| 1 | Power | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical_SMD | J1 |
The 202 most common of 206 parts.
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Questions
How big is the Bare VCA II PCB?
It measures 70.5 × 128.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bare VCA II use?
206 parts, built around the LM13700M, MMBT3906 and 1N4148WS. 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 Bare VCA II KiCad files?
From the Blinken-Lights/ASCII repository on GitHub, at the commit this page was made from: the board is Bare VCA/hardware/Bare VCA II.kicad_pcb and its schematic Bare VCA/hardware/2xVCAs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bare VCA II 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).