2 layers85 × 115 mm
OSO BOOK B1
joeycastillo/The-Open-Book
For details on how to build, test and use Open Book, I've made documentation available here.
76 parts8.1kCC-BY-SA-4.0
2 layers66 × 40.6 mm
Raspi source
RollMan/raspi-power- Size
- 66 × 40.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 23
- Pads
- 60
- Tracks, vias
- 67, 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 23 Mar 2019
- Updated
- 23 Mar 2019
Overview
Raspi source is an open-source printed circuit board by RollMan, from the RollMan/raspi-power repository on GitHub. It is a 2-layer board of 66 × 40.6 mm with 22 parts on 23 nets, routed with 67 tracks and 2 vias.
It is built around the DMG3415U. Its parts include 7 resistors, 5 connectors, 3 diodes, 3 transistors and 1 IC.
Main components
1README
README.mdRaspi-Power
What is this?
This circuit keeps power supply to a raspberry pi for a second after the main power is down to shut down safely.. The functionalities are almost same as a UPS, but this is specialized to mount a car. This is useful for broadcasting your driving scenary, for example.
How it works?
A car has two (strictly three) outlets: direct to battery and ACC. After you turn off an engine, ACC also turns off. This circuit detects that, and keep the power from battery directly while the raspberry pi is shutting down.
Environment
- kicad to see this circuit
Misc
- A OKL_T footprint thanks to (stm32f1/stm32-board)[https://github.com/stm32f1/stm32_board]
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | Conn_01x01_Female | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J2, J3, J4 |
| 3 | D | Diodes_THT:D_A-405_P7.62mm_Horizontal | D1, D2, D3 |
| 2 | 100k | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2, R3 |
| 2 | 2N7000 | TO_SOT_Packages_THT:TO-92_Molded_Narrow | Q1, Q3 |
| 2 | Conn_01x02_Female | Socket_Strips:Socket_Strip_Straight_1x02_Pitch2.54mm | J1, J5 |
| 1 | 0.1u | Capacitors_THT:CP_Radial_Tantal_D4.5mm_P2.50mm | CP3 |
| 1 | 10 | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R7 |
| 1 | 100u | Capacitors_THT:CP_Radial_Tantal_D4.5mm_P2.50mm | CP1 |
| 1 | 10k | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4 |
| 1 | 1k | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R5 |
| 1 | 330 | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6 |
| 1 | 470k | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 47u | Capacitors_THT:CP_Radial_Tantal_D4.5mm_P2.50mm | CP2 |
| 1 | DMG3415U | TO_SOT_Packages_SMD:SOT-23 | Q2 |
| 1 | OKL-T | stmlib:OKL_T6 | U1 |
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Questions
How big is the Raspi source PCB?
It measures 66 × 40.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Raspi source use?
22 parts, built around the DMG3415U. 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 Raspi source KiCad files?
From the RollMan/raspi-power repository on GitHub, at the commit this page was made from: the board is raspi_source.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Raspi source design in my own project?
Its repository states no licence, so its author keeps all rights: ask RollMan before reusing the design.