In addition to the Front Panel, Jack PCB, and Pico PCB (bought from Allen Synthesis or a third-party supplier), you will need the following components to complete your build. You will also need one 3.5mm cable (normal Eurorack patch cable) to perform the calibration process.
Please note that a few of these are multi-packs of components, and there may well be cheaper alternatives if you are doing a single build, so as long as the specification is the same you can get any of these components from any supplier most accessible to you.
You can either add each of these components to your basket using whichever suppliers you prefer, or alternatively use the complete Mouser Shopping Basket and then buy the few components that Mouser doesn't stock (Knobs, OLED, and Eurorack Power Cable) elsewhere. If buying in bulk there are likely other suppliers that are cheaper - this BOM is compiled for DIY builders aiming to build 1-5 EuroPis at once.
| Component | Quantity | Value | Description | Suggested Supplier |
|---|---|---|---|---|
| R1 - R12, R19 - R20 | 14 | 1k | 1 Kiloohm Resistor | CPC Mouser |
| R13 - R18 | 6 | 4.7k | 4.7 Kiloohm Resistor | CPC Mouser |
| R21 - R23 | 3 | 22k | 22 Kiloohm Resistor | CPC Mouser |
| R24 - R26 | 3 | 10k | 10 Kiloohm Resistor | CPC Mouser |
| R27 - R34 | 8 | 100k | 100 Kiloohm Resistor | CPC Mouser |
| R35 - R40 | 6 | 220k | 220 Kiloohm Resistor | CPC Mouser |
| C1 - C2 | 2 | 1uF | 1 Microfarad Capacitor (Polarised) | CPC Mouser |
| C3 - C14 | 12 | 100nF | 100 Nanofarad Capacitor (Non-Polarised) | CPC Mouser |
| C15 - C16 | 2 | 10uF | 10 Microfarad Capacitor (Polarised) | CPC Mouser |
| D1 - D4 | 4 | 1N5817 | Schottky Diode | CPC Mouser |
| LED1 - LED6 | 6 | L-424HDT | 3mm LED | CPC Mouser |
| VR1 - VR2 | 2 | 10k | 10 Kiloohm Linear Rotary Potentiometer | CPC Thonk (B10K - T18 Shaft - Alpha Vertical Potentiometer) Mouser NOTE: Any resistance value between 5K and 100K will work for the potentiometers |
| SW1 - SW2 | 2 | D6RXX F1 LFS | C&K Tactile Switch (Non-Illuminated) | Thonk Mouser (Black) |
| OLED1 | 1 | 0.91" SSD1306 | I2C OLED Display | CPC The Pi Hut Note: Mouser does not stock the OLED required, and alternative suppliers to those listed may be too wide to fit in the module - always double check the datasheet and see the note below |
| J1 - J8 | 8 | PJ398SM | Thonkiconn 3.5mm Mono Jack | Thonk Mouser Banananuts Cosmonuts |
| CONN0 | 2 (pairs) | 20x1 2.54mm | Pico Connection Header (Male + Female) | CPC: Male, Female Mouser: Male, Female |
| CONN1 - CONN4 | 2 (pairs) | 4x2 2.54mm | PCB Connection Header (Male + Female) | CPC: Male, Female Mouser: Male, Female |
| CONN5 | 1 | 4x1 2.54mm | I2C Header (Male) | CPC Mouser |
| CONN6 | 1 | 5x2 2.54mm | Eurorack Power Header (Shrouded) | CPC Mouser |
| TL074-1 - TL074-2 | 2 | TL074 DIP | Quad Operational Amplifier (+ Socket) | CPC: Op-Amp, Socket Mouser: Op-Amp, Socket |
| MCP6002 | 1 | MCP6002 DIP | Dual Operational Amplifier (+ Socket) | CPC: Op-Amp, Socket Mouser: Op-Amp, Socket |
| Q1 | 1 | 2N3904 | NPN Transistor | CPC Mouser |
| 7805 | 1 | L7805ABV | 5V Linear Voltage Regulator | CPC Mouser |
| 1 | 11mm | M2.5 PCB Standoff + 2 Screws | CPC: Standoff, Screws Mouser: Standoff, Screws |
|
| 2 | T18 Shaft | Knobs | Thonk NOTE: If you buy D-Shaft potentiometers, the knobs must be 'Reverse-D-Shaft' type. Any knobs which fit may be chosen, but Mouser does not stock the standard suggestion sold by Thonk |
|
| 1 | 10 - 16 Pin | Eurorack Power Cable | Thonk Note: Mouser does not stock the correct cable at time of writing. Other suppliers will provide the correct part, but always double check that the polarity is correct (red stripe is always -12V) |
|
| 1 | Micro USB Cable (Capable of Data Transfer) | CPC, The Pi Hut Mouser |
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| 1 | Raspberry Pi Pico | The Pi Hut CPC Mouser Note: Any official version of the Raspberry Pi Pico will work (W, H, or WH). Third party RP2040 boards may work, but there is no guarantee - always double check the pinout |
The OLED has two suppliers listed, each with different pin configurations. The module supports either of these two configurations (the most common), but no others, so make sure that the one you buy, wherever you source it, has one of these two configurations. It also must be 36mm or less. There are some displays which are 38mm wide, which will not only not fit within the width of the module, but will also leave the display off-centre in relation to the panel cutout. You can check the datasheet of any display before you buy to determine the width, but both of the displays listed in the BOM above are the correct 36mm.
