Good Morning
Right now I'm powering my AIU controlled Tortoise switch machines using AC power and steering diodes. I want to use DC from a wall wart. It as been mentioned when using these transformers to use only ones that have regulated power. How do I know which ones are regulated? At least I think that Is the termed used.
Clem
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Best way is to measure with DVM on the wall wart output. If its 12V +/- a few tenths, then wart is regulated. If it measures 13V or higher it is unregulated, as it is just a transformer, diode(s) and capacitor(s). An unregulated is designed to put out 12V (or whatever stated value) at the given stated load amperage. There is inverse relationship that higher load, equals lower voltage.
I use a 12VDC wart to power my 17 Tortoise. I checked it with a portable meter before installation and found fixed 12 volts. On the layout a panel meter registers the same fixed 12 VDC.
If you want a truly regulated and ample power supply, you can also use a Computer Power Supply Unit. If you do this you also have multiple voltages available for specific lights , soundboards- etc. Most people have one of these laying around these days, but if you don't you can get a new one for ~$20. Click here to see an excellent walk through of how to use a PC PSU for layout power.
I am actually using a PC PSU for my motive power (using a wall dimmer) on my On30 layout.
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