2 layers48 × 43 mm
2 layers48 × 156 mm
DMH Mixer PCB
DeMarco/DMH-Mixer4Simple OpAmp based Mixer module
- Size
- 48 × 156 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 43
- Pads
- 141
- Tracks, vias
- 218, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 18 Sep 2024
- Updated
- 1 May 2026
Overview
DMH Mixer PCB is an open-source printed circuit board by DeMarco, from the DeMarco/DMH-Mixer repository on GitHub. It is a 2-layer board of 48 × 156 mm with 44 parts on 43 nets, routed with 218 tracks and 0 vias.
It is built around the TL072. Its parts include 13 resistors, 12 capacitors, 5 connectors, 5 switches and 4 diodes. It belongs with the audio and music boards of this library.
Main components
1README
README.mdDMH-Mixer
Simple OpAmp based Mixer module
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R3, R5, R7, R9, R10, R11, R12 |
| 4 | 100k | SynthStuff:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2, RV3, RV4 |
| 4 | 100nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C3, C4, C5, C6 |
| 4 | 1uF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C7, C8, C9, C10 |
| 4 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R4, R6, R8 |
| 4 | SW_SPDT_321 | SynthStuff:Toggle_Switch_THT | SW1, SW2, SW3, SW4 |
| 2 | 47pF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C11, C12 |
| 2 | 47uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C2 |
| 2 | Conn_01x08 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J50, J60 |
| 2 | ZPD3V9 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
| 1 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J0 |
| 1 | IDC_02x05 | SynthStuff:IDC-Header_2x05_P2.54mm_Vertical_BackBone | J200 |
| 1 | IDC_02x05 | SynthStuff:IDC-Header_2x05_P2.54mm_Vertical_Eurorack | J100 |
| 1 | SB140+ | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | SB140- | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 1 | SW_DPDT | SynthStuff:Toggle_Switch_2_Poles_THT | SW5 |
| 1 | TL072 | Package_DIP:DIP-8_W7.62mm_Socket | U1 |
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Questions
How big is the DMH Mixer PCB PCB?
It measures 48 × 156 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DMH Mixer PCB use?
44 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 DMH Mixer PCB KiCad files?
From the DeMarco/DMH-Mixer repository on GitHub, at the commit this page was made from: the board is DMH_Mixer_PCB/DMH_Mixer_PCB.kicad_pcb and its schematic DMH_Mixer_6ch_PANEL/DMH_Mixer_6ch_PANEL.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DMH Mixer PCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask DeMarco before reusing the design.