43501Re: [Z_Scale] 9V Adaptors
- Mar 31, 2006On Gwe, 2006-03-31 at 16:12 +0000, Steve Gibbs wrote:
> The sales person 'recommended' a 9V 800mA adaptor. I'm noYou need a 9v adaptor that much is reasonable (or one of the
> but I usually take their staff recommendations with more than a grain
> of salt. So I figured I'd come to the experts...
multi-voltage ones with a switch). If you are replacing batteries it
needs to be DC. Depending on the controller it may also need to be
"regulated" or "smoothed". You will need to find that out from the
A basic 9v adapter puts out something vaguely around 9v with the voltage
depending upon load and the actual output being a waveform varying
between 0 and 9(ish) volts. A smoothed one outputs a 9v (ish) voltage
which does not wave up and down so is more like a battery and a
regulated 9v supply puts out a steady 9v until overloaded.
800mA should be plenty. In fact 800mA is probably sufficient to power
modern LED lighting circuitry as well as a loco. Märklin's own
controllers are normally rated at 0-8v 500mA (*) to the track and 0-10v
800mA to the lightning/motor circuits.
If you only want to power track then 500mA regulated is probably fine
(*) The newer ones use feedback and other clever stuff and are much more
complicated but the older simple one did this.
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