Computer brush fan as dc generator

AI Thread Summary
The discussion focuses on using a computer brush fan as a DC generator to supply 1.5 to 2 volts for an amplifier circuit. The fan outputs up to 2.5 volts under ideal conditions but fails to power the circuit, which works with a 1.5-volt DC supply from a battery. Participants clarify that the output from the fan is indeed DC, but the issue likely stems from insufficient amperage. They emphasize that the open circuit voltage measured is higher than the voltage under load, suggesting a need to check the current output against the circuit's requirements. The conversation concludes with a reminder about forum etiquette regarding thread types.

Output

  • dc

    Votes: 1 100.0%

  • ac

    Votes: 0 0.0%
  • Total voters
    1
  • Poll closed .
praga_deesan
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Computer brush fan as dc generator
Sir,
I am using renewable soℝurces like wind for my project..
I need to supply 1.5 to 2 v dc to my amplifier circuit and then to load...
I am using computer brush fan as source ...it just gave output upto 2.5v in ideal state when i connected to multimeter in dc mode...but when i give the output of the comp fan to my circuit..it is not working/..

note: My circuit is working well when i gave 1.5v dc supply thru DCRPS..

Please let me know whether the out of computer brush fan is dc or ac...
if dc .,what is the mistake in it..
if AC, then,what will be the design of bridge rectifier..
 
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It is DC. The problem is almost certainly lack of amperage. Have you checked how much can be supplied vs what you need?
 


Thank you sir,
will amperage vary from 1.5v dc battery to 2v generator..
 
Last edited by a moderator:


praga_deesan said:
will amperage vary from 1.5v dc battery to 2v generator..
Yes.
 


Also open circuit voltage you read with your meter will naturally be higher than the voltage measured when there is a load on that generator

Dave
 


praga_deesan said:
Computer brush fan as dc generator
Sir,
I am using renewable soℝurces like wind for my project..
I need to supply 1.5 to 2 v dc to my amplifier circuit and then to load...
I am using computer brush fan as source ...it just gave output upto 2.5v in ideal state when i connected to multimeter in dc mode...but when i give the output of the comp fan to my circuit..it is not working/..

note: My circuit is working well when i gave 1.5v dc supply thru DCRPS..

Please let me know whether the out of computer brush fan is dc or ac...
if dc .,what is the mistake in it..
if AC, then,what will be the design of bridge rectifier..

Welcome to the PF.

Poll threads are generally not allowed in the technical PF forums. It looks like you have received good answers to your question. If you have further questions, please start a new thread, and please do not make it a poll thread. Thank you.
 
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