Teardown of a 12V DC to 110V AC Inverter
A few weeks ago as i was browsing eBay i came across this item. It was a 12/24V DC to 110V AC Inverter (5W). Seeing that it was only around RM10, i bought one to rip apart and see its inner workings.
Fast forward 2 weeks, the item arrives. No idea what the Chinese writing means. So lets crack this baby open
After disassembling everything we are presented with this fairly simple PCB. One plus point of the PCB is that the components and its values are printed on the board (Only thing that didn’t have a value was the small transformer).
Another shot of the PCB
And the back of the PCB. Afew of the solder joints were poorly done (expected) and there was one cold solder joint upon closer inspection.
I changed the red & white multi-core wire to a more sturdy single core copper wire and took some readings in AC & DC. Also probed the board with the Rigol scope and didn’t really see an AC sine wave on the output (AC coupled the probe). I did however see an AC sine wave (~30V) one one of the transformer pins (On the input side).
After that i decided to plot the schematic onto eagle (beware of mistakes ). If anyone can make any sense of any of this or helps you in anyway, do drop a comment!