Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
can anyone tell me what is the problem with this circuit. i have connected all the components as given but i am unable to switch off the alarm even when light falls on the photodiode.....plz help anyone..
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