By using this project or its parts, for any purpose and in any shape or form, you grant your implicit agreement to all the following statements:
- You condemn Russia and its military aggression against Ukraine
- You recognize that Russia is an occupant that unlawfully invaded a sovereign state
- You support Ukraine's territorial integrity, including its claims over temporarily occupied territories of Crimea and Donbas
- You reject false narratives perpetuated by Russian state propaganda
To learn more about the war and how you can help, click here. Glory to Ukraine! 🇺🇦
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Can:
- Use: You are free to use the hardware de# any way.
- Modify: You can make modifications to the design.
- Distribute: You can share the original or modified design with others.
- Commercial Use: You can use the de# commercial projects.
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Can't:
- Hold Liable: The original author is not liable for any damages or consequences resulting from the use of the design.
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Conditions:
- Attribution: You must give appropriate credit to the original author, including a copyright notice, a link to the license, and an indication of any changes made.
- ShareAlike: If you modify the design, you must distribute your contributions under the same license as the original.
- License Notice: You must include a copy of the CERN-OHL-W v2 with the distributed design or provide a clear link to the license.
Disclaimer: This summary is not a legal document and does not provide legal advice. Please read the full license text for a complete understanding of its terms and conditions.
This repo contains the hardware and soon TM software for the ultra efficient raspberry pi UPS. The reason this was created was because I wasn't satisfied with the things available on the market that would just lower the incoming voltage to charge the battery and immediately boost it to power the pi. This way efficiencies of around ~80% can be achieved. Don't get me wrong this is not terrible but I wanted to do better, which is why this de#corporates a power MUX.
| Issue | Possible fix |
|---|---|
| Power mux and everything involving the comparator oscilates when trying to shut down. | Use TL431 instead, it combines a voltage reference and a comparator. |
| Turning switch off while plugged in doesn't turn off the output. | Rework the schematic. |
| DW01 chip is acting up (high leakage, not working half of the time). | Replace with BQ2970. |
| BMS turns off when the charger is plugged in. | Try removing diodes going to the fs8205. |
