Automatic Door Light Switch Circuit Diagram

Two circuit diagrams have been included. Components required reed switch with magnet available as combination lm741 op amp ic cd4017 decade counter ic 5v relay module lamp bc558 pnp transistor. Light activated switch circuit using ldr sensor.

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Automatic door light switch circuit diagram.

A relay switch is used at the output of the circuit from which you can connect the connection of an ac lamp that you want to open. One end of the reed switch is connected to 5v power supply while the other is connected to the base of bc558 pnp transistor. Transistors t3 and t4 stop conducting and relays rl1 and rl2 de energise to switch on the light and open the door lock. Automatic washroom light switch circuit diagram.

Circuit diagram of the automatic lock and lights circuit fig. The circuit will also require a small size of permanent magnet to be fitted on the corner of the door in front of the reed switch that will be placed at the boarder of the door. Also read the post. Similarly when they start leaving the room by enabling foot switch s2 counter ic3 reduces by one count and the display shows the.

The circuit diagram of this device consists of two main components. The working principle of the light switch is quite simple. Operational amplifier ic lm741 and decade counter ic cd4017. This automatic door light switch circuit turns on a lamp when a door is opened then turns it off when the door is opened again.

The first diagram shows the automatic light circuit using a fixed light level to automatically switch the led on. Ff2 is configured as a r s memory to store the state of the switch. Automatic bathroom light switch circuit diagram. To make the light level at which the led switches on adjustable you will also need a 100k trimpot.

2 x 10kω resistor 100ω resistor 820ω resistor connecting wires.

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