b'Circuit 1B:of the knob with your RedBoard, you can make volume controls, speed controls, Potentiometer angle sensors and a ton of other useful inputs for your projects. In this circuit, youll use a potentiometer as an input Potentiometers (also known as trimpots device to control the speed at which your or knobs) are one of the basic inputs for LED blinks.electronic devices. By tracking the position YOULEDPOTENTIOMETER330 RESISTOR7 JUMPER WIRESNEEDNEW COMPONENTS ANALOG INPUTS: So far, weve only POTENTIOMETER: A potentiometer isdealt with outputs. The RedBoard also has inputs. Both inputs and outputs can be a 3-pin variable resistor. When powered analog or digital. Based on our previous with 5V, the middle pin outputs a voltage 10k definition of analog and digital, that means between 0V and 5V, depending100k330an analog input can sense a wide range of on the position of the knob on values versus a digital the potentiometer. Internal to the input, which can only trimpot is a single resistor and aC106sense two values, or SCALwiper, which cuts the resistor in two andC106 3.3V C106 ASRDEDFstates. E EFT 5V RXX T 13GN132I/Omoves to adjust the ratio betweenIORSV3 ~1110RE3 S TS T R A O M E T H N I G5.V ~19GNDD POWER ANALOG IN ON ~8 DIGITAL (PWM ~)both halves.You may have noticedGINNV ~ 7A0 ~65some pins labeledA1 4A2 3A3 ~21A4 TXXNEW CONCEPTS Digital and someA5 R 0ISPANALOG VS. DIGITAL: We live in anlabeled Analog In on your RedBoard. There are only six pinsanalog world. There are an infinite numberthat function as analog inputs; they are of colors to paint an object, an infinitelabeled A0A5.number of tones we can hear, and an infinite number of smells we can smell. The common theme among these analogVOLTAGE DIVIDERsignals is their infinite possibilities. VOLTAGE DIVIDERS are simple circuits that turn some voltage into a Digital signals deal in the realm of the smaller voltage using two resistors. A discrete or finite, meaning there is a potentiometer is a variable resistor that limited set of values they can be. The LED can be used to create an adjustable voltage from the previous circuit had only two divider. A wiper in the middle position states it could exist in, ON or OFF, when means the output voltage will be half of the connected to a digital output.input. Voltage dividers will be covered in more detail in the next circuit.20 : circuit 1b'