Page 46 - The Basics IA by ETron Circuit Labs

ETron Circuit Labs44Lab 23 Continuity TesterObjective:In this Lab you will build a Continuity Tester circuit that will use a tone to demonstrate continuity of a circuit.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 be used as a source of pulses that are sent to transistor Q1 which drives a speaker. R1, R2, and C1 control the frequency of the pulses coming from Pin 3 of the 555 Timer IC. When you touch the probes to something to check