A simple light activated switch description.
Light activated switch circuit components.
The light activated switch circuit mainly consists of two components.
The automatic light sensor circuit can be designed using various electrical and electronic components.
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.
Light activated switch circuit this light activated switch circuit with ldr and an operational amplifier has many applications.
The major components used in this circuit are light sensor ldr darlington pair transistors and a relay.
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.
It has two internally frequency compensated operational amplifiers.
How the light activated switch circuit works.
It could act as a photocell and switch off the light in a room or turn on the radio when it is dawning etc.
A 230v ac supply is provided to the load in this case the load is represented with a lamp.
This is the circuit diagram of a light activated switch based on national semiconductors comparator ic lm 311 and a 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.