Page 14 - The Basics IA by ETron Circuit Labs

ETron Circuit Labs“Place your finger on the Photocell and watch the LED light get dimmer”Lab 7Intro to PhotocellsObjective:In this Lab you will learn how a Photocell works and observe that a photocell varies its resistance with light.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 3Step 3 – Do ExperimentTheory:In this simple electronic circuit, the electrons flow from the negative side of the battery through the LED, through the Photocell, and back to the positive side of the battery. The more light hitting that goes into the Photocell, the brighter the LED will light up.12