¡Sorpréndeme!

making of a Laser alarm security circuit on breadboard

2016-05-20 2 Dailymotion

Here we are making a simple laser alarm security circuit. This circuit is very easy.
Things needed: Breadboard, Laser pointer (From laser ballpoint pen), CDS, 2n7000(FET), BT169(SCR) 6.8kΩ Resistor, 5V buzzer, LED, 100Ω Resistor, 16V 1μF Electrolytic capacitor.