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Back emf?

Shaggy74

Nov 14, 2017
5
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Nov 14, 2017
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Hi, I have constructed the circuit shown below, I am using a 9v battery as the power supply, when the motor is running the battery gets extremely hot, how can I prevent this from happening please? Any help will be gratefully appreciated
 

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duke37

Jan 9, 2011
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Jan 9, 2011
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Use a more powerful battery.
Reduce the load.

Some information on the battery type and load current would be helpful. Does it work?
 

Alec_t

Jul 7, 2015
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Jul 7, 2015
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3,212
The motor should have a back-emf protection power diode in parallel.
 

Alec_t

Jul 7, 2015
3,212
Joined
Jul 7, 2015
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3,212
The diode should have a current rating similar to the peak current that the motor draws.
 
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