How a PNP Transistor Works

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Presentation transcript:

How a PNP Transistor Works Collector PNP 2N3906 Base Emitter The flat side faces up

Take Inventory of your Parts You will need the following parts from your kit: Breadboard 220 ohms resistor (red, red, brown, gold) 1000 ohms resistor (brown, black, red, gold) PNP Transistor 2 @ LED (light emitting diode) 9 volt battery lead 3 wires 9 volt battery Pushbutton switch

Use this schematic to construct the experiment. Build the Circuit Use this schematic to construct the experiment. 220 Ohm collector base - 1K Ohm 9 volts emitter + Quick Check: Your circuit should like this one.

Do the Experiment Connect the 9 volt battery. Observe the brightness of the LED’s. Press the pushbutton switch. Observe and compare the brightness of the LED’s. Release the pushbutton. Troubleshooting: If the LED’s do not light up, check to make sure they in correctly. Check the battery. Does it have voltage? Are there any breaks in the circuit? Is the PNP in the right way?