Power on Reminder circuit with light sensing (LDR) , Using 555 IC & 4017 decoder

Hello and welcome to this tutorial on building a power on reminder circuit with light sensing using a 555 timer IC and a 4017 decoder. In this video, we will guide you through the process of building a circuit that can remind you to turn on a device, such as a light or a fan, when the room is dark.

The heart of this circuit is the 555 timer IC, which is used to generate a pulse that triggers the 4017 decoder. The 4017 decoder, in turn, drives a set of LEDs that indicate whether the device is turned on or off.

The light sensing element in this circuit is an LDR (Light Dependent Resistor), which changes its resistance in response to changes in light. When the room is dark, the resistance of the LDR increases, which causes the 555 timer to trigger the 4017 decoder. This, in turn, lights up an LED to remind you to turn on the device.

To build this circuit, you will need a breadboard, a 555 timer IC, a 4017 decoder, an LDR, a few capacitors, resistors, and LEDs, and some connecting wires.

First, connect the LDR in series with a resistor and connect it across the power supply. The output of the LDR is then connected to the trigger input of the 555 timer IC, along with a capacitor and a resistor to set the timing of the circuit. The output of the 555 timer is connected to the clock input of the 4017 decoder, along with a few capacitors to stabilize the circuit.

Finally, connect the output of the 4017 decoder to the LEDs that indicate whether the device is turned on or off.

Once you have assembled the circuit, test it by covering the LDR with your hand or a piece of paper to simulate darkness. This should trigger the circuit and light up the LED that reminds you to turn on the device.

That's it! You have now built a power on reminder circuit with light sensing using a 555 timer IC and a 4017 decoder. We hope you found this tutorial helpful and informative. Thank you for watching!

Видео Power on Reminder circuit with light sensing (LDR) , Using 555 IC & 4017 decoder канала Abdul Hamid