prateeksikka Posted April 5, 2005 Author Report Share Posted April 5, 2005 hi audioguru!that means its a big complicated chain of transistors which are succesively turned on by LEDs? to increase the signal level current?am i right?prateek Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 5, 2005 Report Share Posted April 5, 2005 The optocoupler has a single LED and a single phototransistor. The chain of transistors amplify the current output and voltage rating of the phototransistor. Quote Link to comment Share on other sites More sharing options...
EHAB_MANSOUR Posted April 6, 2005 Report Share Posted April 6, 2005 hi ithink that optocuopler is known as (photocoupler) and used to make isolation between low ampere device such as(micocontroller) and its interface circuit .if you want any thing else about that device send me a mail message ([email protected]). Quote Link to comment Share on other sites More sharing options...
Faz Posted November 5, 2006 Report Share Posted November 5, 2006 how about if I want to give a bipolar input which is +-10V dc to the optocoupler? I came across on the product of H11AA1. Does it really suitable for my application to fed the optocoupler to the ADC part which the voltage signal is +-10V also.Do i need a low pass filter or a buffer circuit by using the op-amp of 741 after the optocoupler to fed the ADC input.PLLLLZZZzzzzzzzzz....give an idea ;D Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted November 8, 2006 Author Report Share Posted November 8, 2006 i guess at such low voltage level at which you are operating ,u do not need an optocoupler...i generally use it when there is a high voltage AC circuit on 1 side and a very low voltage dc ckt on the other... Quote Link to comment Share on other sites More sharing options...
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