====== Brief presentation of your project : ======

• what it does

Potentiometer Control LED Light

• what is its purpose

Here introduces the Arduino analog input function, which controls the brightness of the LED light by reading input voltage values through a potentiometer.

The analog input is a pin with ADC (Analog-to-Digital Converter) function. It can convert the externally input analog signal into a digital signal that can be recognized during chip operation, so as to realize the function of reading in the analog value. The Arduino analog input function has 10-bit precision, that is, it can convert a voltage signal of 0 to 5V into an integer form of 0 to 1024. Utilize the analogRead() function to read input voltage values by the potentiometer, and then use the analogWrite() function to control the brightness of the LED light.

==== Experimental Materials ====

1. 1x Uno R3 development board
2. 1x Bread board and supporting connecting line
3. 1x 220Ω current limiting resistor
4. 1x LED
5. 1x potentiometer
6. Supporting USB data cable

Move the position of pin 2 by rotating the knob, changing the resistance value from pin 2 to both ends. In the experiment, connect pin 1 and pin 3 to the 5V GND of the development board, and then read the voltage of pin 2 obtained by the potentiometer through the analog input pin A0, and the range is between 0V to 5V.

Experimental Steps

1) Build the circuit according to the schematic diagram

Connect the positive pole of the LED lamp to the current limiting resistor, connect the other end of the resistor to the 10th pin of the development board, and connect the negative pole of the LED lamp to the GND of the development board. Pin 1 and pin 3 of the potentiometer are connected to the development board 5V and GND respectively, and pin 2 is connected to the A0 pin of the development board.

The physical connection diagram is shown in the figure below:

Here's all about hardware design :

• parts list
• wiring diagrams (can also be downloaded from the internet and from datasheets, eg http://www.captain.at/electronic-atmega16-mmc-schematic.png)
• signal diagrams
• simulation results

</notes>

===== Software Design =====

<type notes> Description of the application code (firmware):

• development environment (if any) (eg AVR Studio, CodeVisionAVR)
• libraries and 3rd-party sources (eg Procyon AVRlib)
• algorithms and structures that you plan to implement
• (step 3) implemented sources and functions

</notes>

===== Results Achieved =====

===== Download =====

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