Electrical cct

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Shaggy1505
Posts: 2
Joined: Sat Dec 30, 2017 10:13 pm

Electrical cct

Post by Shaggy1505 » Mon May 07, 2018 9:00 pm

Hi I have built the cct shown below I have modified it slightly by including a 10v motor, on/off push button switch and 2 9v batteries as the power source. The problem I have is after a few seconds of operation the batteries get extremely hot, I am unsure what to do to prevent this from happening. I would really appreciate any help/advice.
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David
Posts: 220
Joined: Sun Oct 04, 2015 6:18 pm

Re: Electrical cct

Post by David » Tue May 08, 2018 2:16 pm

Hot batteries mean that an excessive current is being drawn by something in the circuit. Do you have a meter capable of reading volts and amps? Have you checked the built circuit against the schematic? Do any other components get hot? Crucially - what sort of motor are you trying to operate? Are you using the small PP3-type batteries?

Replace the motor with a 1K resistor and see if the batteries still get hot.

It would be of use to see a pic of the batteries and the motor.

MichaelBo
Posts: 1
Joined: Sat May 05, 2018 9:42 am

Re: Electrical cct

Post by MichaelBo » Sat May 12, 2018 12:03 pm

Hi David, could it mean that the batteries are malfunctioning as well? The schematic checks out from what I gathered. I'm just thinking out loud, really.

David
Posts: 220
Joined: Sun Oct 04, 2015 6:18 pm

Re: Electrical cct

Post by David » Thu May 17, 2018 8:46 am

The batteries may well have been damaged by excessive current drain and heating. If you want any more assistance, please post the answers to my questions in the earlier reply.

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