Re: [mh] Slightly OT request for circuit to control AC current

[Ake H. Y. <ak...@eu...>]

Evan Graham wrote:

>I have determined that it is possible to modify a common GFCI outlet for 
>use as a current sensor.  The resulting output from the electronics in 
>the GFCI module is a 120VAC signal that is very low current.  My 
>immediate thought was to use a low cost mechanical relay to generate a 
>dry contact output that could, for example, be used to signal MH that an 
>appliance is running.  Problem is that the GFCI circuitry is not capable 
>of producing enough current to drive a common relay.  I thought of using 
>a solid-state relay but these tend to be a little spendy.  I understand 
>the basics of interfacing  DC but know less about options for the AC 
>situation here.  Can anyone suggest a good way to convert this low 
>current AC signal to a dry contact output?
>
>Thanks,
>
>Evan
>
>  
>
Hi Evan,

you can use an opto and build a one-shot like I have done here 
http://www.vscp.org/wiki/doku.php?id=rockhampton in my Rockhamton module.

Regards
/Ake

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Ake Hedman (YAP - Yet Another Programmer)
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