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mark30504
Joined: 03 Oct 2008
Posts: 5
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 03 Oct 2008 13:23 Opto Isolator Question |
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Hello
Need a bit of opto help
Have a project
5 volts in
24 Volts out
How do I locate the correct opto to handle the 24v DC, small amps out ?
thanks
Mark
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hameeds01
Joined: 23 Aug 2005
Posts: 110
Helped: 1
Location: NUST Islamabad
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| 03 Oct 2008 15:37 Re: Opto Isolator Question |
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| search for the datasheets of 4N25 ,PC817 . just put a voltage divider at the input side
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mark30504
Joined: 03 Oct 2008
Posts: 5
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| 03 Oct 2008 20:26 Re: Opto Isolator Question |
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Hello
Thanks
I have done that already and am confused but the infromation given.
http://www.optoinc.com/optocouplers1.html
has a listing of most optos, there are several voltages listed in the .pdf.
I assumed it would be emitter to collector voltage ?
If so, 4n25 is listed at 6V max.
Do you have any personal experiance using these at 24V ?
thanks
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dragan
Joined: 08 Apr 2001
Posts: 52
Helped: 2
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| 14 Oct 2008 18:36 Re: Opto Isolator Question |
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6 volts in 4n25 is max reverse voltage in light emitting diode , and the collector to emmiter max voltage is VCEO=30V , and reverse VECO = 6V
Greetings
Dragan
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mark30504
Joined: 03 Oct 2008
Posts: 5
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| 18 Oct 2008 15:47 Re: Opto Isolator Question |
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| Thanks
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