how to measure current on electric motor?

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  #1  
Old 12-03-06, 12:51 PM
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how to measure current on electric motor?

i have a small motor that runs off 6v DC. I am trying to figure out how to read the current of the motor so I can put an AC adapter on it. I have a multi-meter and I'm not getting any readings. I've been putting the multimeter on the + and - of the power cable going to the motor. what am i doing wrong?
 
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Old 12-03-06, 01:03 PM
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ok i figured out i had to break the circuit and got it to work. new question tho. if i set the multimeter on DCA @ 20m I get a reading between .10 and .12. It fluctuates a bit. So being this is a 6V system what AC adapter would I be looking for? 6V and what current?

Thanks.
 
  #3  
Old 12-03-06, 01:21 PM
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Actually any AC/DC adapter with an output of 6 volts and an amperage greater than the motor's draw. I would look for 6 volts and 300-600 milliamps output. The adapter only supplies as much current the motor needs (draws).
 
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Old 12-03-06, 01:32 PM
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1 more question. id like to wire in a fuse for this. what size would i need?
 
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Old 12-03-06, 04:26 PM
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Check a place like "the shack". 1 amp or less inline fuse wired on the plus side of the 6 volt output.
 
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