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OPTOCOUPLER CIRCUIT diagram!

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ali ghafoor

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i need the simplest U-shaped optocoupler circuit diagram...i am to meaasure the speed(RPM) of a dc-fan controlled by a miocrocontroller....plz help me out!!
 

KJ6EAD

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ark5230

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It looks you need a light beam source and a light detector with response time consistent with your speed measuring arrangements. Perhaps a microcontroller based system should serve the purpose.
 

zuisti

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Do you want only to measure the speed or also to control it?
 

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