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spearte circuits

Discussion in 'General Electronics Discussion' started by maor, Nov 26, 2015.

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  1. maor


    Nov 25, 2015
    i have source of 0-5v output and he has Rin of some Mega ohms and the source has maximum current of 20mA. and i have a destiniation of 0-5v input and he has Rin of some Kohms. i want to connect between the source and the destination with oprocoupler, and i want that when i give, lets say, 3v in the source i will get 3v in the destination
    ( if i give 2.5v in the source i will get 2.5v in the destination). can you tell me which optocoupler to use and how the circuit looks like?

    Thank you,
  2. Colin Mitchell

    Colin Mitchell

    Aug 31, 2014
    Why do you want to use an opto-coupler?
  3. maor


    Nov 25, 2015
    Because i have a machine (mks 247d) with 25 pin connector with four diffrent grounds and i want to connect it to the arduino mega2560 and separate the arduino and the machine circuits because i have 4 diffrent grounds.
  4. Martaine2005


    May 12, 2015
    Did you come up for air? I cannot read that!!
    Arouse1973 likes this.
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