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Need a variable speed switch 4 model

Tankbuilder

Active member
Hoping someone here can help me.

O know they existed but I need a variable speed switch for one of my model dioramas. Actually two of them. The switch needs to controldepending on the batteries i use, between 3 and 9 volts and from zero to the top voltage ofthe battery or pbatteries. Anyone know of such a switch from Radio Shack?

Thanks and cheers
 
Radio Shack pretty much has gone away these days. What you probably need is either a 5 position rotary switch with an off position ( off,1,2,3,4) that you can hook resistor values to. Also if it is resistor related, you could use a pot with an off switch. (pot is a variable resistor)

It would help if you could explain what you are trying to do.
 
Not quite sure either what you are looking for, but if its just a variable resistor here is one for 9 Volt circuits.

https://www.radioshack.com/products/radioshack-5k-ohm-linear-taper-potentiometers

02711714_00_2cfcd2e9-dcd4-499b-83cd-77626d86cec0_600x600_crop_center.progressive.jpg


James
 
Thanks guys!

I want to use it to control the speed of an electric motor in my 1/28 scale Werner Voss' Fokker F.1 triplane model. I have the Red Baron's Fokker Dr.1 finished but I'd like to have Voss' motor go from stop to speed whilst videoing it in operation.

Thanks again.

Cheers
 
Motors are a bit tricky to control like that. Most operate at pretty high rpm and use gearing to reduce speed. RC controls use a series of transistors (FETs) to regulate or move through speed settings.

You might get lucky if you use a potentiometer, but you're most likely not going to be able to slow it like you want. It'll slow down, even with resistors, but it won't be a smooth curve, it'll gain pretty fast.

Since you're not trying to fly or drive, I'd suggest you go with the lowest power source that'll turn your motor, like a single AA, that way any resistance in line will be more effective.
 
Here's a different thought :hmmm

If you want complete speed control you may want to consider a train transformer with a pulsating DC option.

The control is 1-100 % You can get a used one pretty cheap.

Cheers, Christian B)
 
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