| Electronics > Projects, Designs, and Technical Stuff |
| 5v to 4.1v for camera |
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| Chriss:
You alright, but I would suggest to give a schematic of the camera electronic circuit so we can see with what we deal. From my practice over almost 20 year of repairing gsm phones, tablet's etc. they all have a voltage regulator between the battery and also between the wall charger connector. I also assume the main voltage what is coming from the battery is regulated 3.3v or 3.7v or something between. All that voltage regulators working from 5v and upward depending on the circuit design. This unit will work also from 5v connected too probably. But all this reading and writing has no sense if we don't see the schematics of the camera. And doing so, we just "assume" does it "can" or "must not" work etc... Maybe to open the camera and check how the circuit is made... Sent from my GT-I8260 using Tapatalk |
| jaipursky:
Thank you so much for all responses. |
| Richard Crowley:
It is not clear from your question whether your "Li-Ion battery 4.1v." is some sort of replacable primary cell? Or is it a wired-in secondary (rechargable) cell? If it is built-in and rechargable, how do you recharge it? There are dozens of charging boards that take USB 5V and charge up a single Lipo cell. Isn't that the common way of dealing with this? https://www.adafruit.com/product/1904 |
| NiHaoMike:
The cheap and dirty solution is a series diode, a trick used in Perk mining clusters back in the day. The right way is to use a buck converter module. |
| james_s:
If this were something that would draw >2A I'd say go with a buck converter, but it's likely a few dozen mA, use a diode if you're worried, or just feed it straight from 5V. Anything battery powered will have a fairly wide tolerance range. A lithium ion battery is likely to be on fire by the time it hits 5V but at 4.2V nominal designing a circuit that couldn't tolerate 5V to run from it would be cutting things uncomfortably close for me. |
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