RGB Strip PWM Controller using an Arduino with Potentiometer and Bluetooth

To control the RGB strip light is not so easy task, but not so hard too. It requires a sufficient amount of current to turn it on properly. Here it drains the total of 1.2A current measured with a multimeter. The main problem arises when you want to control it using an Arduino and to obtain delightful and various colors. Because It can't provide a constant amount of current required to turn the RGB strip on. So here, N-E-MOSFETs are used to provide the constant current to the strip.

The project mainly highlights-

1. RGB light strip: It is the main thing that is to be controlled at 12V and 1.2A. 

2. Arduino Nano: It is the brain of the project for controlling different color mixing and its brightness by reading an analog value from the potentiometer. Analog values are mapped in between 0-255. Where 0 is the minimum and 255 is the maximum value of the PWM signal.

3. N-E-MOSFETs: It is used to provide the constant current to turn on the RGB strip light. As there are three color LEDs on the strip. Hence it requires three MOSFETs as well each for one led i.e (Red, Green, and Blue).

4. Potentiometers: It is used to adjust the PWM signal for each of the RGB LEDs.

5. 7805 Voltage regulator: As it is well-known that Arduino requires a constant 5V. To regulate the 12V to 5V, 7805 is used with some passive components and a heat sink for better stability of the output.

6. Bluetooth module: In case, we don't want to control the RGB strip using a potentiometer. Here, the Bluetooth module is also embedded on the PCB so that it can be easily controlled from a distance. After disconnecting the Bluetooth from an Android device, the color will automatically change wherever it was, according to the PWM values taken from the potentiometer.

7. Resistors: There are three resistors for each of the MOSFET's gate-source terminal to avoid the effect of noise or any external factors on the circuit.

8. Capacitors: It is used to filter the DC input and output voltage with a 7805 voltage regulator IC.

9. 12V 1.5A AC-DC Adaptor: To power up the circuit, an AC-DC adaptor is used to provide a stable 12V 1.5A supply.

10. PTH (PCB through holes): A perfboard also known as prototype PCB is used for mounting and soldering all the components together.

To control the RGB strip light is not so easy task, but not so hard too. It requires a sufficient amount of current to turn it on properly. Here it drains the total of 1.2A current measured with a multimeter. The main problem arises when you want to control it using an Arduino and to obtain delightful and various colors. Because It can't provide a constant amount of current required to turn the RGB strip on. So here, N-E-MOSFETs are used to provide the constant current to the strip.

The project mainly highlights-

1. RGB light strip: It is the main thing that is to be controlled at 12V and 1.2A. 

2. Arduino Nano: It is the brain of the project for controlling different color mixing and its brightness by reading an analog value from the potentiometer. Analog values are mapped in between 0-255. Where 0 is the minimum and 255 is the maximum value of the PWM signal.

3. N-E-MOSFETs: It is used to provide the constant current to turn on the RGB strip light. As there are three color LEDs on the strip. Hence it requires three MOSFETs as well each for one led i.e (Red, Green, and Blue).

4. Potentiometers: It is used to adjust the PWM signal for each of the RGB LEDs.

5. 7805 Voltage regulator: As it is well-known that Arduino requires a constant 5V. To regulate the 12V to 5V, 7805 is used with some passive components and a heat sink for better stability of the output.

6. Bluetooth module: In case, we don't want to control the RGB strip using a potentiometer. Here, the Bluetooth module is also embedded on the PCB so that it can be easily controlled from a distance. After disconnecting the Bluetooth from an Android device, the color will automatically change wherever it was, according to the PWM values taken from the potentiometer.

7. Resistors: There are three resistors for each of the MOSFET's gate-source terminal to avoid the effect of noise or any external factors on the circuit.

8. Capacitors: It is used to filter the DC input and output voltage with a 7805 voltage regulator IC.

9. 12V 1.5A AC-DC Adaptor: To power up the circuit, an AC-DC adaptor is used to provide a stable 12V 1.5A supply.

10. PTH (PCB through holes): A perfboard also known as prototype PCB is used for mounting and soldering all the components together.