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100V dc power supply?? 100mA are plenty but

Started by dsk, May 26, 2014, 12:45:36 PM

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dsk

100V dc power supply?? 100mA are plenty but i dont know how to make it easy. Now I got  5 laptop powers of 19.5V each.

It should be close enough if I connect them in series. Any simpler way to do it?

dsk

twocvbloke

Easy, a 220-240vAC to 110-120vAC stepdown transformer with an AC-DC rectifier circuit, though I'm not sure if it would give you 100v, I do know that rectifying AC to DC drops the voltage a bit, but I don't know by how much at those levels... :)

Owain

with a bridge rectifier you'd typically have a 75-80 V secondary (depending on the voltage dropped by the regulator), at 12 VA,

The voltage calculation for single phase full wave rectification using bridge rectifier is


(Wiki: rectification)

online calculator