Door Guard
Use immediately

Door Guard

23746-+IC1μA741+9VR2330ΩLED2BLINKINGPZ1PIEZO-BUZZERC20.22 μ-9VVR14.7KPRE-SETC10.22μR182KR3470ΩLDR1LED1WHITEDoor Guard
6
0
0
publish time: 2020-10-21
Kiraaaa

This guard uses an operational amplifier µA741 and a photoresistor (LDR). The operational amplifier µA741 is used as a sensitive voltage comparator. LDR1 and resistor R1 are connected to the inverting pin 2 of IC1. LED1 and LDR1 are installed on the opposite side of the entrance, and the light from LED1 will fall on LDR1.

See More Related Templates