Power supply
About the Power supply PCB
Power supply is an open source PCB design by gridbugs, published on GitHub under the MIT license. It is a 2-layer board measuring 70 × 135 mm, with 32 components from 15 distinct parts.
Other key parts include the LM7812_TO220, L7912 and L7805. By type, the board carries 12 capacitors, 6 diodes, 4 connectors, 3 ICs, 2 resistors and 1 switch.
It belongs with the power & battery designs in this gallery.
From the project
- U1 is flipped on the silkscreen from how it should be connected. This means there's no space for a heat sink.
Main components on the Power supply
Power supply bill of materials (BOM)
32 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM7812_TO220 | TO-220-3_Vertical | U1 |
| 1 | L7912 | TO-220-3_Vertical | U2 |
| 1 | L7805 | TO-220-3_Vertical | U3 |
| 1 | Barrel_Jack | BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 3 | Output | IDC-Header_2x03_P2.54mm_Vertical | J2, J3, J4 |
| 3 | Heatsink_AAVID_Extruded_531002B02100G_34.9x12.7mm_H25.4mm | Heatsink_AAVID_Extruded_531002B02100G_34.9x12.7mm_H25.4mm | H1, H2, H3 |
| 1 | heatsink to220 | heatsink to220 | H4 |
| 1 | SW_SPDT | switch1 | SW1 |
| 4 | Rectifier Diode | D_A-405_P7.62mm_Horizontal | D1, D2, D3, D6 |
| 1 | LED (Red, positive output status) | LED_D5.0mm | D4 |
| 1 | LED (Blue, negative output status) | LED_D5.0mm | D5 |
| 6 | 4700uF | CP_Radial_D18.0mm_P7.50mm | C1, C2, C3, C4, C5, C6 |
| 6 | 1uF | CP_Radial_Tantal_D4.5mm_P2.50mm | C7, C8, C9, C10, C11, C12 |
| 1 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
Power supply design files
The KiCad project lives in the gridbugs/modular2 repository on GitHub; these links point at the commit this page was built from.
Power supply: common questions
How big is the Power supply PCB?
The Power supply measures 70 × 135 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Power supply?
32 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the Power supply design files?
From the gridbugs/modular2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Power supply design in my own project?
Yes, under the terms of its MIT license, which gridbugs chose for the repository.
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