4 layers163 × 116.5 mm
2 layers
Mixer
gehel/synth- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 121
- Nets
- 98
- Pads
- 318
- Tracks, vias
- 355, 28
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 4 Oct 2023
- Updated
- 2 May 2026
Overview
Mixer is an open-source printed circuit board by gehel, from the gehel/synth repository on GitHub. It is a 2-layer board with 121 parts on 98 nets, routed with 355 tracks and 28 vias.
It is built around the TL072 and LM386. Its parts include 61 resistors, 44 capacitors, 9 ICs and 7 connectors. It belongs with the audio and music boards of this library.
Main components
2Parts
121| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 120K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R5, R13, R14, R15, R16, R23, R24, R25, R26, R33, R34, R35, R36, R49 +1 |
| 16 | 20K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8, R9, R10, R17, R18, R19, R20, R27, R28, R29, R30, R37, R38, R39, R40 |
| 14 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C3, C5, C7, C10, C11, C12, C13, C27, C28, C29, C30, C37, C42 |
| 12 | 47uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C17, C18, C19, C20, C23, C24, C25, C26, C33, C34, C35, C36 |
| 10 | 10pF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C4, C6, C8, C15, C16, C21, C22, C31, C32 |
| 8 | 150K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R41, R42, R43, R44, R45, R46, R47, R48 |
| 4 | 15K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R51, R52, R53, R54 |
| 4 | 470K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R12, R22, R32 |
| 4 | 47K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R11, R21, R31 |
| 4 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J21, J22, J23, J24 |
| 4 | TL071 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U1, U2, U3, U4 |
| 3 | TL072 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U5, U6, U7 |
| 2 | 100K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R56, R58 |
| 2 | 10R | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R60, R61 |
| 2 | 10uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C9, C14 |
| 2 | 1uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C38, C41 |
| 2 | 220uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C39, C44 |
| 2 | 300K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R50, R55 |
| 2 | 4.7K | Library:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R57, R59 |
| 2 | 47nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C40, C43 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J25, J26 |
| 2 | LM386 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U8, U10 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J20 |
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Questions
What parts does the Mixer use?
121 parts, built around the TL072 and LM386. 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 Mixer KiCad files?
From the gehel/synth repository on GitHub, at the commit this page was made from: the board is Mixer/Mixer/Mixer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mixer design in my own project?
Its repository states no licence, so its author keeps all rights: ask gehel before reusing the design.