OT: white LEDs (was: Re: Solderless breadboarding (and 68010 vs
ard at p850ug1.demon.co.uk
Sat Feb 27 12:27:53 CST 2010
> On Fri, Feb 26, 2010 at 2:26 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> > Ah, TV sets over here rarely had power transformers at all... Every valved
> > monochrome TV Iv'e worked on... had a 300mA series string of valve heaters
> > and got the B+ line by half-wave rectifying the mains.
> Sure, but your mains were twice the voltage of our mains.
I am suprised that voltage doubler PSUs (2 diodes, 2 capacitors) weren't
used in the States.
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