SnackBus PSU
About the SnackBus PSU PCB
SnackBus PSU is an open source PCB design by coriolisinstruments, published on GitHub. It is a 2-layer board measuring 99 × 87 mm, with 34 components from 14 distinct parts.
Other key parts include the LM317_3PinPackage. By type, the board carries 12 connectors, 6 resistors, 4 LEDs, 3 capacitors, 2 diodes and 1 IC.
It belongs with the audio designs in this gallery.
From the project
Open-source eurorack synthesizer modules and related stuff.
A small, easy to DIY, power supply for Eurorack modules. Designed to be used in a surplus Moog Mother-32 or DFAM skiff, utilizing the existing wall-wart and internal connector. Add some spacers as feet and you can also use it as a benchtop power supply for your eurorack breadboarding experiments.
This power supply was design as a even lower-cost (the total cost is about €30), even smaller, alternative to the excellent Befaco LunchBus skiff PSU. In terms of circuitry, the SnackBus is almost identical. Why use this? Well, the SnackBus fits into a Moog 60 HP skiff (from the Mother-32 or DFAM)…
Main components on the SnackBus PSU
SnackBus PSU bill of materials (BOM)
34 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM317_3PinPackage | TO-220F-3_Horizontal_TabDown | U1 |
| 1 | Conn_01x02_Male | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J1 |
| 8 | Conn_02x08_Counter_Clockwise | IDC-Header_2x08_P2.54mm_Vertical | J2, J3, J4, J5, J6, J7, J8, J9 |
| 3 | Conn_01x01_Male | PinHeader_1x01_P2.54mm_Vertical | J10, J11, J12 |
| 6 | mechanical_cooling_slot_very_large | mechanical_cooling_slot_very_large | SLOT1, SLOT2, SLOT3, SLOT4, SLOT5, SLOT6 |
| 4 | LED | LED_D3.0mm | D_+5V_1, D_+12V_1, D_-12V_1, D_PWR_1 |
| 1 | IN5402 | D_DO-201AD_P15.24mm_Horizontal | D1 |
| 1 | IN4004 | D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 1 | 100n | C_Disc_D7.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 10u | CP_Radial_D5.0mm_P2.50mm | C2 |
| 1 | 22u | CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 680R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 4 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5 |
| 1 | 330R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
SnackBus PSU design files
The KiCad project lives in the coriolisinstruments/EurorackModules repository on GitHub; these links point at the commit this page was built from.
SnackBus PSU: common questions
How big is the SnackBus PSU PCB?
The SnackBus PSU measures 99 × 87 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SnackBus PSU?
34 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the SnackBus PSU design files?
From the coriolisinstruments/EurorackModules repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the SnackBus PSU design in my own project?
The repository has no license, so all rights stay with coriolisinstruments. Use it as a reference, and ask the author before reusing the design.
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