How the light activated switch circuit works.
Light activated switch circuit components.
A 230v ac supply is provided to the load in this case the load is represented with a lamp.
The major components used in this circuit are light sensor ldr darlington pair transistors and a relay.
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.
This is the circuit diagram of a light activated switch based on national semiconductors comparator ic lm 311 and a ldr.
It has two internally frequency compensated operational amplifiers.
The lm358 ic has 8 pins and can have supply voltages ranging from 3 32 volts.
Light activated switch circuit this light activated switch circuit with ldr and an operational amplifier has many applications.
The light activated switch circuit mainly consists of two components.
A simple light activated switch description.
1 light activated day night switch using transistors.
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.