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abdulgtm Posted - Feb 07 2010 : 01:43:56 AM
I hv need of help to make a circuit combination lock for my home security or shop, mean when I leave my home I must active my circuit , and when if some one open that door withiout my wish then after some time delay that circuit give alarm / hooter in that area, because that circuit did not get required combination lock circuit.
please guide me a circuit which is whitout using programming or conroller

Thanks

A.Rehman
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Aaron Cake Posted - Feb 07 2010 : 11:05:44 AM
http://www.aaroncake.net/circuits/combolock.asp is a good first step. Then just use the siren of your choice and simple motion detectors and/or magnetic door switches.

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