2 layers148 × 84.5 mm
Panel daisy
ohmtech-rdi/eurorack-blocks
Software to Hardware Prototyping for Eurorack using C++, Max/Gen~ or Faust
259 parts410
2 layers49.2 × 63.8 mm
OpAmp Mixer Board KiCAD files
- Size
- 49.2 × 63.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 23
- Pads
- 84
- Tracks, vias
- 180, 8
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Apr 2026
- Updated
- 1 Apr 2026
Overview
Blend is an open-source printed circuit board by CroasmunEngineeringLabs, from the CroasmunEngineeringLabs/Mixer repository on GitHub. It is a 2-layer board of 49.2 × 63.8 mm with 41 parts on 23 nets, routed with 180 tracks and 8 vias.
It is built around the TL072. Its parts include 14 resistors, 10 capacitors, 2 ICs, 1 transistor and 1 switch.
Main components
1Parts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R5, R6, R10, R13, R14 |
| 4 | 10uF | Wampler:CAP_ELEC_33UF_35V | C4, C5, C8, C10 |
| 4 | 220n | Wampler:CAP_FILM_100NF | C3, C6, C7, C9 |
| 3 | 220K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R11, R12 |
| 2 | 33K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 4K7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8 |
| 2 | TL072 | Wampler:OP_AMP | U1, U2 |
| 1 | +9V_0 | Wampler:PAD_2MM | H5 |
| 1 | +9v_1 | Wampler:PAD_2MM | H11 |
| 1 | +9v_2 | Wampler:PAD_2MM | H12 |
| 1 | 22uF | Wampler:CAP_ELEC_10UF_35V | C2 |
| 1 | 2n5457 | Wampler:BJT_2N5458 | Q1 |
| 1 | 47uF | Wampler:CAP_ELEC_10UF_35V | C1 |
| 1 | B25K | Wampler:POT_16MM_RA | RV1 |
| 1 | GND_0 | Wampler:PAD_2MM | H6 |
| 1 | GND_1 | Wampler:PAD_2MM | H9 |
| 1 | GND_2 | Wampler:PAD_2MM | H10 |
| 1 | IN | Wampler:PAD_2MM | H1 |
| 1 | OUT | Wampler:PAD_2MM | H8 |
| 1 | RETURN1 | Wampler:PAD_2MM | H4 |
| 1 | RETURN2 | Wampler:PAD_2MM | H7 |
| 1 | SEND1 | Wampler:PAD_2MM | H2 |
| 1 | SEND2 | Wampler:PAD_2MM | H3 |
| 1 | SW_SPST | Button_Switch_THT:SW_DIP_SPSTx01_Slide_6.7x4.1mm_W7.62mm_P2.54mm_LowProfile | SW1 |
Questions
How big is the Blend PCB?
It measures 49.2 × 63.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Blend use?
41 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 Blend KiCad files?
From the CroasmunEngineeringLabs/Mixer repository on GitHub, at the commit this page was made from: the board is Blend.kicad_pcb and its schematic Blend.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Blend design in my own project?
Its repository states no licence, so its author keeps all rights: ask CroasmunEngineeringLabs before reusing the design.
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