Light Switch With Relay is a series of electronic switches that are controlled by a series of light received.
The basic concept used in this voltage limitter is D1 and D2 are in pairs on a voltage comparator
This circuit is a simple two transistor (2N2222) mini FM transmitter. No license is required for this transmitter according
Short circuit protector is a series of standard short circuit protector of positive voltage regulator 78xx. Variations in short
SMS Remote controller is a device used to control a device remotely using the SMS facility through GSM phones.
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