LIGHT ALARM - 3 (MOVEMENT DETECTOR)
This circuit is very sensitive and can be placed in a room to detect the movement of a person up to 2 metres from the unit.
The circuit is basically a high-gain amplifier (made up of the first three transistors) that is turned on by the LDR or photo Darlington transistor. The third transistor charges the 100u via a diode and this delivers turn-on voltage for the oscillator. The LDR has equal sensitivity to the photo transistor in this circuit.
This circuit is very sensitive and can be placed in a room to detect the movement of a person up to 2 metres from the unit.
The circuit is basically a high-gain amplifier (made up of the first three transistors) that is turned on by the LDR or photo Darlington transistor. The third transistor charges the 100u via a diode and this delivers turn-on voltage for the oscillator. The LDR has equal sensitivity to the photo transistor in this circuit.
|
|
10 Most Trusted Casino Apps for Android and iOS 2021 - Wooricasinos.info
888 Casino is the best 피망 포커 mobile yesbet88 casino 숫자 야구 필승법 for Android and iOS players. The site provides a 룰렛사이트 nice interface, a great 유흥업소 사이트 mobile-friendly and user-friendly interface.