A 230v ac supply is provided to the load in this case the load is represented with a lamp.
Light activated switch circuit components.
It has two internally frequency compensated operational amplifiers.
The light sensor circuit is an electronic circuit designed using light sensor ldr darlington pair relay diode and resistors which are connected as shown in the light sensor circuit diagram.
1 light activated day night switch using transistors.
The major components used in this circuit are light sensor ldr darlington pair transistors and a relay.
Light activated switch circuit this light activated switch circuit with ldr and an operational amplifier has many applications.
The circuit is based on a voltage comparator circuit wired around ic 1 the non inverting in put of ic1 is given with a reference voltage of 6v using resistors r3 and r4.
The lm358 ic has 8 pins and can have supply voltages ranging from 3 32 volts.
This is the circuit diagram of a light activated switch based on national semiconductors comparator ic lm 311 and a ldr.
The comparator ic lm358 and the ldr.
The circuit can be used as a commercial automatic street light control system as a domestic porch light or corridor light controller or simply can be used by any school kid for displaying the feature in his school fair exhibition the following content describes four simple ways of making a light activated switch using different methods.
How the light activated switch circuit works.
The automatic light sensor circuit can be designed using various electrical and electronic components.