Simple yet safe 5V switching power supply
(Reverse Engineered Schematics)
Schematic of a German FRIWO charger (probably a mobile phone charger from the era before USB). Very simple circuit and a safe looking design. However, the voltage is very inaccurate, with no load it is around 8V and with a load about 6-7V.
Photo of a German FRIWO charger.
Charger board from through hole component side.
Board from the tracks and SMD component side. Note: the board has been repaired or modified in the past.
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