2 layers167.1 × 363.5 mm
2 layers70 × 135 mm
Power supply
gridbugs/modular2- Size
- 70 × 135 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 14
- Pads
- 89
- Tracks, vias
- 142, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Nov 2025
- Updated
- 7 Nov 2026
Overview
Power supply is an open-source printed circuit board by gridbugs, from the gridbugs/modular2 repository on GitHub, published under the MIT licence. It is a 2-layer board of 70 × 135 mm with 39 parts on 14 nets, routed with 142 tracks and 0 vias.
It is built around the L7805 and L7912. Its parts include 12 capacitors, 6 diodes, 4 connectors, 3 ICs and 2 resistors. It belongs with the power boards of this library.
Main components
2
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
L7912
TO-220ST0℃~+125℃@(Tj) 1 1.2A 12V 200uV 2V@(1A) 35V 3mA 60dB@(120Hz) Fixed Negative Over Voltage Protection、Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
low-pass-filter/README.mdLow-pass Filter
Quirks
V1
- The "Cutoff" potentiometer is reversed.
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1uF | Capacitor_THT:CP_Radial_Tantal_D4.5mm_P2.50mm | C7, C8, C9, C10, C11, C12 |
| 6 | 4700uF | Capacitor_THT:CP_Radial_D18.0mm_P7.50mm | C1, C2, C3, C4, C5, C6 |
| 4 | Rectifier Diode | Diode_THT:D_A-405_P7.62mm_Horizontal | D1, D2, D3, D6 |
| 3 | Heatsink_AAVID_Extruded_531002B02100G_34.9x12.7mm_H25.4mm | Heatsink:Heatsink_AAVID_Extruded_531002B02100G_34.9x12.7mm_H25.4mm | H1, H2, H3 |
| 3 | Output | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J2, J3, J4 |
| 3 | heatsink to220 | modular2:heatsink to220 | H4, H4, H4 |
| 1 | 100K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U3 |
| 1 | L7912 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LED (Blue, negative output status) | LED_THT:LED_D5.0mm | D5 |
| 1 | LED (Red, positive output status) | LED_THT:LED_D5.0mm | D4 |
| 1 | LM7812_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | LOGO | modular2:ibis-small | G*** |
| 1 | SW_SPDT | modular2:switch1 | SW1 |
The 35 most common of 39 parts.
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Questions
How big is the Power supply PCB?
It measures 70 × 135 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power supply use?
39 parts, built around the L7805 and L7912. 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 Power supply KiCad files?
From the gridbugs/modular2 repository on GitHub, at the commit this page was made from: the board is power-supply/power-supply.kicad_pcb and its schematic arduino-delay/arduino-delay.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power supply design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).