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optoisolator

FlashCreated

Mar 22, 2010
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Mar 22, 2010
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hi,

Does anyone know of an optoisolator that can switch 240V 1A (mains) with 5V 2.5mA (parallel port)?

thanx in advance!!!

FlashCreated
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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Look at the specs of some Solid State Relays.

Here is an example which *might* suit your requirements.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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looks like 10 to 15mA. You'll need to use the parallel port output to switch a transistor, and somewhere you can grab the required current from.

5 bucks? That's cheap!
 
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FlashCreated

Mar 22, 2010
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well thanx!
if i'm using a transistor circuit isn't it essayer to use a relay?
and it's 7 buck, need 8 of them, and i live in france.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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You could use a transistor and a relay, but then you'd need far more current to pull in the relay.

In addition, if you're switching the load very rapidly on and off, you may have to consider the mechanical wear on the relay.

This one is $5 :)

Hey, the Euro's pretty strong against the $US. Just be glad you're not in Australia!

You might be able to use something like this at $US2 each.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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You did say you wanted it opto-isolated.

Yeah, sure, you could get a bunch of opto-isolated triac drivers and use them to trigger triacs.

It may work out a little cheaper than the SSR's.
 

Resqueline

Jul 31, 2009
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You should be able to get these 100mA opto triacs for a half to one euro.
Their max trigger current is specified at 5mA but are likely to make do with less than 3mA. There are others that require even less but they may be more expensive.

Random phase trigging:
- 400V; EL3023
- 600V; EL3053

Zero cross trigging:
- 400V; EL3043
- 600V; EL3063
 
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