LED light dimming
Nowadays we like displaying everything.
We all love the information that we see in written form or the sign which is in writing. And LCD is the easiest medium to show your message in writing. But the LED used to illuminate the LCD is always on. That does not work any more than wasting energy. How good will it be that when we need light then it will increase and when we do not need light then it will be slow?
This circuit of today ensures this work.
We all love the information that we see in written form or the sign which is in writing. And LCD is the easiest medium to show your message in writing. But the LED used to illuminate the LCD is always on. That does not work any more than wasting energy. How good will it be that when we need light then it will increase and when we do not need light then it will be slow?
This circuit of today ensures this work.
In the above image, the points of an LCD are depicted. In this, there are 16 points, as we can see. The initial 14 points are of LCD, and the last 2 points are for LED. At these two points, we connect the power source through the resistance. The points add up to the number 15 and add point number 16 to the ground.
Now if we have to reduce the illumination of the LED, then we need to focus on these two points.
As we know, there is so much light in the daytime that we can read the information coming on LCD. So this means that we should not light the LED in the daytime and at night we need to light the LED.
Now if we have to reduce the illumination of the LED, then we need to focus on these two points.
As we know, there is so much light in the daytime that we can read the information coming on LCD. So this means that we should not light the LED in the daytime and at night we need to light the LED.
The circuit shown above does the same thing. It uses the 555 timer. In this circuit, we take out the square signal of the frequency of 4.8 KHz from the 555 timer, which is given by the resistor in the base of the transistor.
We will use the fifth number of 555 regulator pin on this, we will create a voltage divider with the help of a resistance and a light dependent resistor, whose value will change according to the environment. And when its value changes, the time period of the 555 will also change the timing, due to which the LED will be light or fast. And in this way, we will always see the LCD messages as per our own.
While testing in the laboratory, it was considered low value. But getting a light dependent resistor of such a low value is very much difficult, you can use the 500K LDR in place of VR1 and 500K resistor instead of R5.
Keep the upper part of the light controlled resistor in the sky and keep in mind that it is open. There should not be any shadow on this.
Please put any comments related to the appropriate circuit in the comments.
Author: - Anirudh Kumar Sharma
--- Ani-Lab ---
We will use the fifth number of 555 regulator pin on this, we will create a voltage divider with the help of a resistance and a light dependent resistor, whose value will change according to the environment. And when its value changes, the time period of the 555 will also change the timing, due to which the LED will be light or fast. And in this way, we will always see the LCD messages as per our own.
While testing in the laboratory, it was considered low value. But getting a light dependent resistor of such a low value is very much difficult, you can use the 500K LDR in place of VR1 and 500K resistor instead of R5.
Keep the upper part of the light controlled resistor in the sky and keep in mind that it is open. There should not be any shadow on this.
Please put any comments related to the appropriate circuit in the comments.
Author: - Anirudh Kumar Sharma
--- Ani-Lab ---
No comments