28-01-2013, 08:03 PM
what is the theory and how to make an electronic letter box using IC555&LDR,LED.
electronic letter box working and construction
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electronic letter box working and construction - by Guest - 28-01-2013, 08:03 PM
RE: electronic letter box working and construction - by Guest - 15-03-2016, 06:21 PM
RE: electronic letter box working and construction - by dhanabhagya - 19-03-2016, 03:04 PM
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