Introduction
In today’s tutorial, I will show you a very interesting circuit with which you can easily control an RGB light with the TV remote at home. You can change the color of the light using the remote and the most interesting thing is that I did not use any Arduino or Microcontroller to make it. I made it using some common electronics components which are easily available in offline or online shops.
Circuit Diagram :
How the circuit works :
To know the workings of this circuit, we must first know about the Multicolor Light. It is not an ordinary light, it has some special features, which make this light different from all other lights. This light has seven different colors. When the light is turned on for the first time, the light glows with one color, and when turned off and on again, the color of the light changes. It means if the light is red when you turn it on for the first time, then when you turn off the light and turn it on again, the color of the light changes to blue. When the light is turned off and on again, the color of the light changes again and becomes yellow. Thus, every time we turn the light off and on again, its color will change. This is how this light works.
So we have to make a circuit through which we can control this light by TV remote means by pressing any key of the TV remote the color of this light will change.
To do this we need to make a circuit that will keep the light always on, and whenever any key on the TV remote is pressed, the light will turn off for a second and then on again. As a result, we can easily change the color of the light through the TV remote.
TSOP Sensor :
Through the TSOP Sensor, we will get the signal from the TV remote whether any key is pressed or not. TSOP Sensor has three pins – VCC, GND, and OUT. The VCC pin is connected to the positive supply and the GND pin is connected to the negative supply and from the output pin we will get the output. Whenever this sensor receives a signal, its output pin is shorted to GND and a negative voltage is obtained from the output pin. This is how this sensor works.
Capacitor :
A binary value (example – 0101110) is transmitted from the remote if you press any key on the TV remote once. In general, if you press any button on the remote, the receiver sensor gives an ON OFF ON OFF ON OFF output It means if we connect an LED to the output pin of the TSOP sensor, then the LED will flash once ON OFF ON OFF ON OFF ON OFF like this, we will not get any stable output from that sensor. So to get a stable output from the sensor, a capacitor must be connected to the output of the TSOP sensor and the GND pin. This capacitor will help to stabilize the output of the sensor, after installing it, if we press any key on the remote, the light will turn on stably and not blinking.
Transistor :
The light we are going to control is AC light so we need a relay to control it with DC. However, the output we get from the TSOP sensor is not enough to control the relay. So we have to amplify the output from the TSOP Sensor. We have used a PNP transistor to amplify the output signal.
Diode :
We use a diode in reverse bias to send the output signal from the TSOP sensor to the base of the transistor. This diode will protect the TSOP sensor from damage.
We have connected a diode in parallel with the coil pin of the relay, this will protect our circuit from the back EMF of the relay coil.
Relay :
I said above that the light we want to control is AC light, so we have used a relay to control this light with DC. Relay has 5 pins – 2 Coil pins, a Common pin (COM), a Normally Open pin (NO), and a Normally Close pin (NC).In normal conditions, the common pin of the relay is connected with the Normally Open pin, whenever we give supply voltage to the coil pin, the common pin will be connected with the Normally Close pin. This is how relays work. Here we cut any of the wires of the light and connect one wire to the Normally Open pin of the relay and another wire to the common pin of the relay. As a result, when we turn on the AC switch, the light will turn on. Whenever we press any key of the remote, the relay will turn off for 1 second or for a short time and turn on again, as a result, the color of the light will change.
This is how this circuit works I hope you like this tutorial very much if you have any doubts you can comment in the comment box. Thanks for reading this post 😊
