I read this post:
viewtopic.php?p=767085&hilit=HUZZAH32+B ... GE#p767085
I have the same problem, is there a guide or could someone explain how to achieve what suggested in the last comment? I mean:
1) Is there a way of increasing the charge rate to greater than 100mA?
You would have to change the charge rate resistor, which would require some SMT soldering.
Thanks a lot!
BATTERY CHARGING
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- adafruit_support_carter
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Re: BATTERY CHARGING
There's no guide with specific steps and information.
The schematics for the board are available:
https://learn.adafruit.com/adafruit-fea ... /downloads
which shows the LiPo charge circuit which has the resistor which sets the charge rate.
The datasheet for the MCP73831 LiPo charger would have further details on how that resistor sets charge rate.
The schematics for the board are available:
https://learn.adafruit.com/adafruit-fea ... /downloads
which shows the LiPo charge circuit which has the resistor which sets the charge rate.
The datasheet for the MCP73831 LiPo charger would have further details on how that resistor sets charge rate.
- maverickk89
- Posts: 5
- Joined: Tue Jan 24, 2023 5:10 pm
Re: BATTERY CHARGING
thank you for the reply, I suppose that already in board's schematic it is shown how resistor should be changed:
https://cdn-learn.adafruit.com/assets/a ... 1583183441
10k --> 100mA
5k --> 200mA
2k --> 500mA
1k --> 1000mA
Now what is not clear is which resistor is that and where is it located on the board?
https://cdn-learn.adafruit.com/assets/a ... 1583183441
10k --> 100mA
5k --> 200mA
2k --> 500mA
1k --> 1000mA
Now what is not clear is which resistor is that and where is it located on the board?
- adafruit_support_carter
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- Joined: Tue Nov 29, 2016 2:45 pm
Re: BATTERY CHARGING
This is worth reading for some general consideration about changing charge rate:
https://learn.adafruit.com/adafruit-mic ... harge-rate
There are tradeoffs to consider.
There have been minor variations to the board's layout with time. You'll need to get the PCB files from here:
https://learn.adafruit.com/adafruit-fea ... /downloads
This guide discusses how to use these files:
https://learn.adafruit.com/accessing-an ... sign-files
including how to locate parts:
https://learn.adafruit.com/accessing-an ... ting-parts
The charge rate resistor is this one connected to the PROG pin on the MCP73831.
The MCP73831 datasheet is available here:
https://learn.adafruit.com/adafruit-mic ... /downloads
https://learn.adafruit.com/adafruit-mic ... harge-rate
There are tradeoffs to consider.
There have been minor variations to the board's layout with time. You'll need to get the PCB files from here:
https://learn.adafruit.com/adafruit-fea ... /downloads
This guide discusses how to use these files:
https://learn.adafruit.com/accessing-an ... sign-files
including how to locate parts:
https://learn.adafruit.com/accessing-an ... ting-parts
The charge rate resistor is this one connected to the PROG pin on the MCP73831.
The MCP73831 datasheet is available here:
https://learn.adafruit.com/adafruit-mic ... /downloads
- maverickk89
- Posts: 5
- Joined: Tue Jan 24, 2023 5:10 pm
Re: BATTERY CHARGING
ok so far if I understood well, the resistor that I should change is that one shown in the attached image, correct?
so the next question is, where could I find the replacement with the correct resistance? I would go for the max rate e.g. 1.0K, beacuse battery I need to use is 2000-3000 mAh, what do you think?
so the next question is, where could I find the replacement with the correct resistance? I would go for the max rate e.g. 1.0K, beacuse battery I need to use is 2000-3000 mAh, what do you think?
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- adafruit_support_carter
- Posts: 29189
- Joined: Tue Nov 29, 2016 2:45 pm
Re: BATTERY CHARGING
Hmm...is it really using a resistor pack? Looks like it might be. That's going to be a very tricky hardware change. You'll need to bypass only that one path of the pack since the others will need to be retained.
Please be positive and constructive with your questions and comments.