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[on:]

Hi..

I just purchased a geared motor from a junk shop. It seems to run when it is powered  (That's a good news for the money I paid).. But I couldn't get the ratings for this motor. Is there any way to find its voltage rating, current rating and its gear ratio?

Thank you...

[Reply #1 on:]

Are there any identifying numbers on the motor?  If you're lucky you'll be able to find the specifications by searching the web for those identifying numbers.

DC motor ratings are very loose.  If you provide more voltage they will draw more current, spin faster, and heat up more.  If you have a variable voltage power supply you can crank up the speed until the motor gets hot.

[Reply #2 on:]

Can you post a picture of the motor here, with a ruler or other means of gauging size next to it?

[Reply #3 on:]

Try using a multimeter (only for current and resistance, that is).