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In the USA they would be common in industrial electronics. I have no idea what vendors you have access to in India. Not sure if you would be interested in dealing with international vendors/shipping.
Ken
That would work! Junked wall warts are great for this kind of project.It should be available here with Industrial components dealers, but surely 5-10 times costlier than a low voltage DC relay I assume. I'd go for a better method. I can get a thrown away 5v mobile charger smps, so just use it with a 6v relay that is ready in my hand. Else I may use a transformer at the worst case.
Thanks all.
That would work! Junked wall warts are great for this kind of project.
Ken
I am in the English speaking part of the "Land of Milk and Honey" (Canada). Yes of course we have backups for our power.Any public electrical supply is prone to short interruptions, even in developed countries like Scotland, and dare I say it the "Land of Milk and Honey" (Canada) where even the back-up has a back-up. Or so we are led to believe.