DMH Dual VCA Mk3 PCB Controls
About the DMH Dual VCA Mk3 PCB Controls
DMH Dual VCA Mk3 PCB Controls is an open source PCB design by DeMarco, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 49 × 121 mm, with 38 components from 15 distinct parts.
Other key parts include the TL074. By type, the board carries 12 resistors, 6 diodes, 4 connectors, 2 switches, 2 capacitors and 1 IC.
From the project
Version 3 of my stereo VCA in Kosmo format
- 2 channels, A and B - 2 CV inputs per channel, each one with its own attenuverter knob - Unipolar control voltage: 0V means VCA is fully closed (gain = 0), +10V means completely open (gain = 1) - 1 offset knob per channel, useful to bias bipolar CV signals like those from LFOs - The offset setting and attenuverted CV inputs of each channel are summed - Toggle switches to select between pan/balanced/tremolo mode, and clipping/distortion - Pan mode: output volue of both channels is halved. Pan CV signal will increase one channel's volume and decrease the other's simultaneously. - Balanced…
Main components on the DMH Dual VCA Mk3 PCB Controls
DMH Dual VCA Mk3 PCB Controls bill of materials (BOM)
38 components, 15 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 | DIP-14_W7.62mm_Socket | U9 |
| 2 | CONN_01X06 Conn_01x06 | PinSocket_1x06_P2.54mm_Vertical | J14, J16 |
| 2 | CONN_01X08 Conn_01x08 | PinSocket_1x08_P2.54mm_Vertical | J15, J24 |
| 1 | 50K 50k | Potentiometer_Alps_RK09L_Double_Vertical | RV6 |
| 4 | 100K 100k | Potentiometer_TT_P110KH1 | RV7, RV8, RV12, RV13 |
| 4 | 50K 50k | Potentiometer_Bourns_3296X_Horizontal | RV9, RV10, RV14, RV15 |
| 2 | 100K 100k | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV11, RV16 |
| 1 | SW_DPDT_3WAY SW_DPDT_3way | Toggle_Switch_2_Poles_TE | SW1 |
| 1 | SW_DPDT_ONOFFON_X2 SW_DPDT_OnOffOn_x2 | Toggle_Switch_2_Poles_TE | SW2 |
| 2 | LED_R | LED_D3.0mm | D5, D6 |
| 4 | ZPD4V7 | D_DO-35_SOD27_P7.62mm_Horizontal | D7, D8, D9, D10 |
| 2 | 100NF 100nF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C18, C19 |
| 4 | 33K 33k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R64, R65, R70, R71 |
| 2 | 18K 18k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R66, R72 |
| 6 | 100K 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R67, R68, R69, R73, R74, R75 |
DMH Dual VCA Mk3 PCB Controls design files
The KiCad project lives in the DeMarco/DMH-Dual-VCA-Mk3 repository on GitHub; these links point at the commit this page was built from.
DMH Dual VCA Mk3 PCB Controls: common questions
How big is the DMH Dual VCA Mk3 PCB Controls?
The DMH Dual VCA Mk3 PCB Controls measures 49 × 121 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DMH Dual VCA Mk3 PCB Controls?
38 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the DMH Dual VCA Mk3 PCB Controls design files?
From the DeMarco/DMH-Dual-VCA-Mk3 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the DMH Dual VCA Mk3 PCB Controls design in my own project?
Yes, under the terms of its CC0-1.0 license, which DeMarco chose for the repository.
