Automatic Door Light Switch Circuit Diagram

To make the light level at which the led switches on adjustable you will also need a 100k trimpot.

Automatic door light switch circuit diagram. Automatic washroom light switch circuit diagram. Light activated switch circuit using ldr sensor. Components required reed switch with magnet available as combination lm741 op amp ic cd4017 decade counter ic 5v relay module lamp bc558 pnp transistor. 2 x 10kω resistor 100ω resistor 820ω resistor connecting wires.

Automatic bathroom light switch circuit diagram. Circuit diagram of the automatic lock and lights circuit fig. The bistables inside cmos 4013 are conected in series. The first diagram shows the automatic light circuit using a fixed light level to automatically switch the led on.

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. Two circuit diagrams have been included. 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.

Transistors t3 and t4 stop conducting and relays rl1 and rl2 de energise to switch on the light and open the door lock. Similarly when they start leaving the room by enabling foot switch s2 counter ic3 reduces by one count and the display shows the. 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 circuit diagram of this device consists of two main components.

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