Alarm Circuits

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Lochmaster 3.0
10w 225-400mhz linear amplifier
Remote flash trigger
Saturating a N-Channel MOSFET
Display Text on an HD44780 LCD with an Arduino
Display driver circuit digital voltmeter
ISO122 / 124 and PGA102, isolated channel has a programmable gain circuit diagram
Car anti-theft alarm circuit
FET high input impedance wideband amplifiers