STEP 1 Start by building the circuit shown in the schematic below, using your active buzzer, a switch, and two resistors

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Step 1 Start By Building The Circuit Shown In The Schematic Below Using Your Active Buzzer A Switch And Two Resistors 1 (77.24 KiB) Viewed 29 times

STEP 1 Start by building the circuit shown in the schematic below, using your active buzzer, a switch, and two resistors (5k10 and 100). • What do you expect to happen when SW1 is closed in this circuit? R2 R1 5.1 ΚΩ 10 Ω www + PSB 5 V - B1 SW1 • What actually happens when SW1 is closed? Although it may seem that nothing happens, placing the probes of your ammeter across the SW1 will reveal that a small current flows through the circuit, as the ammeter setting shorts SW1 when the probes are placed on opposite sides of the switch. This allows current to flow through the series components and also to be measured. The current is very small, so you will need to choose the correct range to get an accurate measurement. • How much current flows through this circuit when the switch is closed or shorted? (Remember to use the correct units of measure, based on the range setting of your meter.) The active buzzer in your kit will show a current of around 23mA when connected directly across 5V. As resistance is added in series with the buzzer, the current is reduced. When the current is too small, there will be no sound produced by the buzzer.