Megacell charger dead

ALL NEW - Battery Finder Search for 12/24/36/48v or by capacity www.batteryfinder.net
New & used Batteries, Solar, accessories, LifePo4 cells & more 5% Coupon "Powerwalls" www.batteryhookup.com
S

selektronike

New member
Joined
Jan 23, 2025
Messages
5
Hello

i borrowed megacell charger from my friend before few weeks, he doesnt told me that input voltage is 5v, i used 12v power supply because i had from xbox nice supply 12v 16A…i used that supply because i saw on official megacell charger that he can work on 5-16v…it didnt been in my case, i saw magic white smoke, almost all regulators for channels was dead, esp is shorted ofcourse … regulator on input can handle max 6 or 7v i cant remember…doesnt matter, i make mistake and i want to solve this..i wroted on official email to buy esp with loaded firmware but no one answers me ever…so i buyed esp32f from local store and i want to ask here is it possible to load firmware and get this work ? Regulators already in transit, expect it every day … i borrowed this to test few cells and build some external pack for my bike but i made some mess and want to solve this … last opinion is buy new charger which gonna costs me about 400e because taxes and etc…thank you
 
Good to know! Would you please give me advice about which one firmware to use ? I think this is older version, maybe about 1.3x, i saw somewhere on board numbers like that but didnt sure, must take a look tomorrow.
 
Oleksii said:
Post your MCC pcb photos here, both sides.
Click to expand...
I was wrong with 1.3x version, it was 0.94.
Picture in attachment
TC4056A was desoldered because of shorts, now I dont have shorts but also dont have anything on display probably because firmware. Runing on 5v with 0.3A draw current.

Thanks
 

Attachments

  • IMG_6004.jpeg
    IMG_6004.jpeg
    2.5 MB · Views: 158
  • IMG_6005.jpeg
    IMG_6005.jpeg
    2.1 MB · Views: 173
  • IMG_6006.jpeg
    IMG_6006.jpeg
    2.4 MB · Views: 156
Oleksii said:
Something still is downloadable here https://www.megacellmonitor.com/Downloads
Click to expand...
It didnt go via usb cable so I desoldered esp and flashed manually with usb ttl, it was done in 30-40sec without any error … so i soldered back esp on board but without luck, it still draw about 30mA, display wont turn on, on clock and data pin i cant see anything on osciloscope .. seems like esp dont wanna turn on or sth like that … do you have any advice ? Thanks
 
You must log in or register to reply here.
Back
Top