Zero Current Soft Power
About the Zero Current Soft Power PCB
Zero Current Soft Power is an open source PCB design by baldengineer, published on GitHub. It is a 2-layer board measuring 64.6 × 28.5 mm, with 22 components from 20 distinct parts.
Other key parts include the NJM2870. By type, the board carries 11 connectors, 4 capacitors, 4 resistors, 2 diodes and 1 IC.
It belongs with the dev boards & breakouts and retro computing designs in this gallery.
From the project
Originally intended to be a controller for a RetroPie. A soft power controller that allows for Raspberry Pi proper shutdown. Intention is to turn this into a "hat." This is a work in progress. It works for me, kinda.
For now, you can find more information at: https://hackaday.io/project/21625-raspberry-pi-soft-power-controller
Main components on the Zero Current Soft Power
Zero Current Soft Power bill of materials (BOM)
22 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NJM2870 | SOT-23-5 | U1 |
| 1 | PWR-SIG | Pin_Header_Straight_1x02 | J1 |
| 1 | SW-SENSE | Pin_Header_Straight_1x02 | J2 |
| 1 | 9V-IN | Pin_Header_Straight_1x02 | J3 |
| 1 | SENSE | SolderWirePad_single_2mmDrill | J4 |
| 1 | OFF-SIG | Pin_Header_Straight_1x02 | J5 |
| 1 | TEST_1P | SolderWirePad_single_2mmDrill | J6 |
| 1 | OFF-SIG | SolderWirePad_single_2mmDrill | J7 |
| 1 | EN | SolderWirePad_single_2mmDrill | J8 |
| 1 | VCC | SolderWirePad_single_2mmDrill | J9 |
| 1 | AVR-VCC | Pin_Header_Straight_1x02 | J10 |
| 1 | 9V-BJ | POWER_JACK_PTH | J11 |
| 2 | 1SS389 | SOD-523 | D1, D2 |
| 1 | 10uF | c_elec_5x5.3 | C1 |
| 1 | 100nF | C_1206_HandSoldering | C2 |
| 1 | 10nF | C_1206_HandSoldering | C3 |
| 1 | 4.7uF | C_1206_HandSoldering | C4 |
| 2 | 10k | R_1206_HandSoldering | R1, R3 |
| 1 | 6.8k | R_1206_HandSoldering | R2 |
| 1 | 6.8k | C_1206_HandSoldering | R4 |
Zero Current Soft Power design files
The KiCad project lives in the baldengineer/Raspberry-Pi-Soft-Power-Controller repository on GitHub; these links point at the commit this page was built from.
Zero Current Soft Power: common questions
How big is the Zero Current Soft Power PCB?
The Zero Current Soft Power measures 64.6 × 28.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Zero Current Soft Power?
22 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Zero Current Soft Power design files?
From the baldengineer/Raspberry-Pi-Soft-Power-Controller repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Zero Current Soft Power design in my own project?
The repository has no license, so all rights stay with baldengineer. Use it as a reference, and ask the author before reusing the design.
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