I kept a circuit board that I pulled out of an old Lexmark laser printer, because it was full of juicy components. I was able to determine that it is a low-voltage power supply (LVPS, part 56P1097).
From what I know, a power supply (such as wall warts) usually consists of a step-down transformer, a rectifier, and perhaps some smoothing capacitors. As expected, this board has all of these, but it also has some huge honking transistors, power resistors, inductors, choke and 200V electrolytic capacitor. What are these for?
These components could come in handy later when I build my own bench power supply, but maybe this board is more useful in its entirety. What do you think?
From what I know, a power supply (such as wall warts) usually consists of a step-down transformer, a rectifier, and perhaps some smoothing capacitors. As expected, this board has all of these, but it also has some huge honking transistors, power resistors, inductors, choke and 200V electrolytic capacitor. What are these for?
These components could come in handy later when I build my own bench power supply, but maybe this board is more useful in its entirety. What do you think?
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