Atlas turnout powered w/ 12vdc 500ma wall cube but?

Aren't the Atlas switch motors suppose to be on AC power?

i think they are compatible w/ ac or dc.

I think you may have to raise the voltage a bit. do you have another Wall adapter that puts out a higher voltage?

yes but i was hoping a cap/res combo would raise the voltage for a brief and safe voltage spike.

You can put a large cap on it with a low value resistor, say 100 ohms, that will approximate a CD system.  Give it a try, it's cheap to experiment.

can i try a polarized Capacitor 4700 uF 25 Volt or 50 volt and 100 ohm res ? and would these be wired in parallel across the plus and -?

You probably don't need anything close to that much capacitance, try 2000 to start.

with the 500ma 12vdc cube can i wire a cap across the + and - and leave the resistor out as the cube is limiting current to 500ma?

How does the current get to capacitor if using a momentary  contact switch? If the toggle is in the off position there's no power at the switch  coils at all . Help me out.

I think I have it.... The cap is hooked directly up the dc wall adapter before the toggle?  John???

yes, using a momentary switch.

For what you're doing you don't need the resistor.  The cap (with or without a resistor) provides a reservoir of energy so that the voltage holds its value a bit longer when drawing above the nameplate (0.5 Amp) current.   I suppose you could call this a "spike" but the available voltage will not be higher than what the cube puts out when idle.

The only reason for having a small resistor in the circuit is to limit the inrush current charging the cap.  Some of the low power bricks have circuit protection in the form of a fuse that may die and render the cube inert.  The resistor is cheap insurance.

thanks john..i will start with a 100 ohm resistor.

Need clarification on capacitor and resistor placement. here is what i have working now w/out the cap and res in the circuit .Plus power from the 12vdc [actually reads 17vdc unloaded} 500ma cube to the center terminal of my atlas turnout. Neg wire from the cube to one side of a momentary [off] on button from there to the turnout outside terminal. My 2nd momentary same thing to the other outside terminal at atlas turnout. it works good except my older high speed turnout sometimes doesn't quite give me that "snap" sound i like to here and i like the idea of a limited power surge to my atlas turnout. My ?..should i place the res and cap across the plus and neg of the cube or in series someplace?

stan thank you. your diagrams match my components exactly.

Just to be clear, in the diagram posted at the end are those momentary switches NO or NC?

Normally open (NO).  When normally open (un-pressed with open contacts), the capacitor charges up to 17VDC thru the resistor.  When you then press the button (closing the contacts) the capacitor instantly dumps its stored energy to the Atlas switch hopefully giving you the "snap" action. 

thank you...and for my FM noise issues as well.