Computer brush fan as dc generator

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Discussion Overview

The discussion centers around the use of a computer brush fan as a DC generator for a project utilizing renewable energy sources, specifically wind. The participant seeks to understand the output characteristics of the fan and its suitability for powering an amplifier circuit.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • The participant reports that the computer brush fan provides an output of up to 2.5V in an ideal state but fails to power their circuit.
  • One participant asserts that the output from the fan is DC and suggests that the issue may be related to insufficient amperage.
  • The participant questions whether the amperage output from the fan will differ from that of a 1.5V DC battery.
  • Another participant confirms that the amperage will vary between the two sources.
  • It is noted that the open circuit voltage measured with a multimeter will be higher than the voltage when a load is connected to the generator.

Areas of Agreement / Disagreement

Participants generally agree that the output from the computer brush fan is DC and that amperage is a likely factor in the circuit's failure to operate. However, the discussion does not reach a consensus on the specific design considerations for using the fan as a generator.

Contextual Notes

The discussion does not resolve the specific design of a bridge rectifier if the output were AC, nor does it clarify the exact amperage requirements for the circuit in question.

Who May Find This Useful

This discussion may be useful for individuals interested in renewable energy applications, particularly those exploring the use of computer fans as generators in low-voltage circuits.

Output

  • dc

    Votes: 1 100.0%

  • ac

    Votes: 0 0.0%
  • Total voters
    1
  • Poll closed .
praga_deesan
Messages
2
Reaction score
0
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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