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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.
LDR can simply be tested connecting Mutimeter in Ohms range and showing to light and blocking it from light
I presume that it wont have fast response,
so it would work for light activated or dark activated switches.
For other details, perhaps it would be better to take and study a data sheet. it can be downloaded here https://www.alldatasheet.com/view.jsp?Searchword=LDR
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