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reducing the RPMs on motorized propellers

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  • Member since
    December 2002
  • From: Arizona
reducing the RPMs on motorized propellers
Posted by delov on Saturday, February 1, 2003 6:54 PM
Does anyone knows how to reduce the speed of the pager/vibrator motors?

Thanks
Borislav
  • Member since
    November 2005
Posted by Anonymous on Saturday, February 1, 2003 9:20 PM
I've never even heard of those so maybe I shouldn't be opening my big mouh. But what fun would that be. Is there a way you could solder in a resistor or poteniometer in to the circuit. With a poteniometer you could make it a variable speed propeller that you could adjust according to your needs. These items are available at your local Radio Shack.

Darren
  • Member since
    February 2003
  • From: Orlando FLorida USA
Posted by mgtaylor on Saturday, February 1, 2003 9:40 PM
I've asked in the store before buying a micro motor. The best answer I could get was to lower the voltage. ie. one 1.5v batt instead of the required two 1.5v (3.0v) to run the motor. Possibly you might also run the wires out of the model through a display base where you may have more room to install the necessary variable resistor?
www.misterkitusa.com
  • Member since
    November 2005
Posted by Anonymous on Wednesday, February 19, 2003 7:07 PM
As a person with a degree in electronics, I would like to say that darrenbb hit the nail on the head with his answer - a potentiometer in series with the motor. A small 1K (or something close to that resistance) should work fine. Most of the pager motors that I'm familiar with usually use AA 1.5 volt batteries. But, with the added resistance of the potentiometer, you can probably get away with using two batteries in series, which would double the voltage to 3 volts. Putting them in parallel will keep the voltage constant (1.5 volts), but would make the batteries last longer by splitting the current load between the two batteries. Hope this helps you out. Let me know if you need any other electronics advice. 8-))
  • Member since
    November 2005
Posted by Anonymous on Thursday, February 20, 2003 9:44 AM
Borislav, I'm glad you asked this... and I'm glad to see some good answers. I'm saving this page because it is on my 'to-do' list to install a motor into something...

I have a 1/72 Corsair on the bench that I've been thinking about doing this to...

M.
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