Page 13 - The Basics IA by ETron Circuit Labs

the resistance in the circuit, the fewer the electrons that will flow.Potentiometers can be used to vary the amount of resistance in many types of electronic circuits and devices.Procedure:Assemble the circuit and connect a 9-volt battery to the Battery Snap and observe the brightness of the LED. Now, turn the shaft fully clockwise and then fully counter-clockwise. As you turn the shaft, the resistance varies through the Potentiometer and this will cause the LED to get brighter and dimmer.Observations:By doing this experiment, you have seen that a Potentiometer can very the resistance in a circuit and thus the brightness of the LED.Conclusion:By completing this Lab you can conclude that a Potentiometer is a variable resistor and its function is to vary the resistance in a circuit.Note: The Potentiometer in this experiment is being used as a rheostat, or variable resistor. A Potentiometer can also be used as a voltage divider. See additional experiments page 87.Check Your Work Here a b c d e 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 a b c d e f g h i j f g h i j Here’s What You’ll Need...RESISTORR1R2a b c O ohms hole 9ihole 22i220 Ohm - (Red, Red, Brown, Gold)POTENTIOMETERFully Clockwisenot usedhole 9c hole 25a100K OhmsFully Counter-ClockwiseAnode CathodeLIGHT EMITTING DIODE (LED)a b c 0O oOhmhsm sLED 1Cathode (flat side)B1hole 9e hole 9fREDBLACKred = hole 25e black = hole 22fSCAN HERE TO SEE MORE ONLINE11LAB 6AnodeVisit us online at www.ETronCircuit.com for more exciting projectsDid you know...Potentiometers are used in radios and TVs to control the volume of the audio in the speaker.