Non contact voltage operated switch

[tone]

Can anybody point me towards a circuit diagram/plan.

I am looking for a design where I can operate a relay by sensing mains
(240v ac) power being switched on in a cable. No metalic contact is to
be made with the mains cable (ie cut into it). I can wrap a wire round
or along it.

Thanks

 

[Rich Grise]

Can anybody point me towards a circuit diagram/plan.

I am looking for a design where I can operate a relay by sensing mains
(240v ac) power being switched on in a cable. No metalic contact is to be
made with the mains cable (ie cut into it). I can wrap a wire round or
along it.

Try googling for "current transformer" or "hall effect device".

Good Luck!
Rich

 

[ehsjr]

Can anybody point me towards a circuit diagram/plan.

I am looking for a design where I can operate a relay by sensing mains
(240v ac) power being switched on in a cable. No metalic contact is to
be made with the mains cable (ie cut into it). I can wrap a wire round
or along it.

Thanks

Hack a cheap voltage sensor to operate a relay:
http://www.toolbarn.com/product/greenlee/GT-11/

Or did you want to learn how it's done?

Ed

 

[Phil Allison]

"Rich Grise"

Try googling for "current transformer" or "hall effect device".

** Ignore this utter fool.






........ Phil