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ARDUINO BASICS :7-SEGMENT 1-DIGIT LED DISPLAY

The 7 segment led display consists of 7 leds that compose a digit and one for the decimal point. Check the type of display you have, some are common anodes and others common cathodes. This just determines wether you have to put them on HIGH or LOW to turn each led on or off. The goal was to be able to command from the serial monitor, the different digits showing up on the display. So first you define functions for each digit, turning on or off the right leds. Then using ifs in the loop and the ASCII table, you can link that to what we enter on the screen. https://www.youtube.com/watch?v=nZpYhfuZsOQ&feature=youtu.be CODE //Sketch for interface PC(serial monitor) to seven segment led display (1 digit) //see display chart for led placement, starts with A on the top center and ends with DP (decimal point) const char l_a = 2; //char is for small numbers, use "long" for others const char l_b = 3; const char l_c = 4; const char l_d = 5; const char l_e =
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ARDUINO BASICS : POTENTIOMETERS

POTENTIOMETERS A potentiometer is a resistor that has a mechanical shaft or screw that can be turned to change its resistance. A potentiometer is just a variable resistor: -> The longer the "trace" from W to either A or B, the higher the resistance. The two schematic symbols for a potentiometer are shown below: Rotary Potentiometers These are the most common type of potentiometers, where the wiper moves along a circular path. Linear Potentiometers In these types of Potentiometers the wiper moves along a linear path. Also known as slide pot, slider, or fader. Some Applications of Potentiometers Potentiometer as a Voltage Divider The potentiometer can be worked as a voltage divider to obtain a manual adjustable output voltage at the slider from a fixed input voltage applied across the two ends of the potentiometer.  Now the load voltage across RL can be measured as VL= R2RL. VS/(R1RL
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