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Posts tagged db meter

Simple RF Signal Strength Meter

Simple RF Signal Strength Meter RF Signal Meter circuit diagram Signal Level Meter, Satellite Meter QAM & DVB Analyzer using 2N3819, 2N229  

DC 12v to 19V laptop charger

Can I charge + 12v battery using + 19v laptop charger? DC 12v to 19V laptop charger circuit modules using LM3524 , BUZ78, BC548

Automatic battery charger circuit

Automatic battery charger circuit Part 2N3055, 7812, 1N4148, 7805, 1815, relay,

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