Page 44 - The Basics IA by ETron Circuit Labs

ETron Circuit Labs42Lab 22 Variable Speed LightsObjective:In this Lab you will build a Variable Speed Lights circuit that will use a potentiometer to control the rate at which the LED’s will blink.Step 1 – Take InventoryUsing the Parts Inventory as shown on the right under the “Here’s What You’ll Need” section, place each part needed for this experiment on its corresponding drawing. Observe the schematic symbol for each part. Make sure that you have all the parts ready before you begin Step 2.Step 2 – Build the CircuitUsing the Schematic Diagram and the picture of the completed lab, build the lab experiment with the electronic components. Use the “Check Your Work Here” Box to verify that your wiring is correct, and then proceed to Step 3.Step 3 – Do ExperimentTheory:In this Lab, the 555 Timer IC will work as a variable speed “clock”. As you adjust the amount of resistance between Pins 6 and 7, the speed of the pulses exiting Pin 3 will change thereby changing the rate at which the LED’s blink.