So I have this sun micro board in my little solar house number light. The board blew up in it and the solar nor charge port doesn’t charge the battery anymore. I was thinking maybe hacking it and using nano or micro to control the charging of the solar panel on top to the 3.7v lithium ion battery.
Do you think this could be done? With a micro or nano? Or do you suggest another board?
Thanks
Mbaker_wv
Probably easier and cheaper to use one of the many modules designed to do this.
I do not know your background but that could be a great learning process for you. The first thing I would do is try to get the schematic, that would be a lot easier than reverse engineering it to get one. It would even be greater if you fix it.
Thank you Kolaha!
Thank you gilshultz
I dont have a degree in mechanical or electrical engineering if thats what your asking 
Im a Cybersecurity major and I find electrical engineering and electronics interesting as a hobby.
The better half has been on me to fix the light and I figured it might be a neat little project to start my journey learning some basics in electronics and maybe ardunio.
let me start looking up these parts that kolaha posted. Might be a good place to start
What voltage does the panel output? What kind of battery do you have?
me?
I probably clicked "reply" under your PWA... intending the one above it. But, hey, how's your battery?
i have many cells, but showed PCB is designed for single Li-Ion cell, so @mbaker_wv can get such module:
and take TP4056 and DW01A from it, but that 8205 will be not case(layout) compatible.
but first is better to check which component is "blew up".
Thank you @kolaha for the reply. sorry been crazy busy 
ill look into this TP4056
More information
I was able to go through the board this week and I learnt quite a bit.
I pulled the sheet for the DW01A and noted that pins 1 and 2 while plugged in only had .5v. So that makes me think I have a blown resistor or something.
I started doing research on 3 digit resistor values and went around the board checking them each. Of all the resistors i was able to lookup, and verify, I have a single (101 = 100ohm) that i cant seem to get anything on it. This resistor is right above the DW01A. suspect?
I also noted these little rectangle on the board that i'm assuming might be capacitors but i have no way of really testing them besides trying to do continuity test.
so maybe these parts are good and I can give that TP4056 a try?
@kolaha what is the difference between the TP4057 and TP4056?
I was looking at:
HiLetgo TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Charging Board with Dual Protection Functions.
tp4057 allow to connect thermistor, but your PCB was designed for tp4056.
if it good you can check only after desoldering it from PCB.
black rectangle -- diode,
braun, yellow -- capacitor.
with "P" -- PTC-Thermistor
I figured the TP board you suggested was a replacement for the whole PCB I’m troubleshooting.
No?
no. i thought you can take chips from that module. but if you want replace the PCB, then you need an additional output current regulator for LED, and button will not work.
Oh that’s a bit over my head lol. I’ll have to research some of that lingo lol
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.
