Page 64 - The Basics IA by ETron Circuit Labs

ETron Circuit LabsLab 32 Insanity AlarmObjective:In this Lab you will build an Insanity Alarm circuit that will use a photocell as a sensor to turn on and off the alarm sound when moved from dark to light spaces.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 toverify that your wiring is correct, and then proceed to Step 3.Step 3 – Do ExperimentTheory:The circuit in this Lab is a two-transistor oscillator with a speaker. When the resistance of the photocell is sufficient for the oscillator to begin working, you will hear a sound from the speaker. As soon as light his the photocell, the resistance reduces and the62