Transcript Investigating the Transistor: A hands on activity.

Investigating the Transistor:
A hands on activity.
You will be
• assembling a one transistor amplifier circuit,
• making it operational, then
• taking measurements to determine the Current Gain
and Voltage Gain and finally, if time,
• Observing the operation with low frequency AC.
Brief Instructions
Components
Assembly
• Place each component, except the thermistor, through
its corresponding holes in the card,
• Ensure correct orientation.
Assembly
• Twist together wires that are to be joined,
• Connect the thermistor remotely to the card by wires
with alligator clips,
• Connect the power supply to the card by wires as
well.
Operation
• Set power supply to 9V, LED should go on.
• Cool thermistor with the ice block in the bag,
the LED should go off.
Measurements
Current Gain
Measurements
Current Gain
• Determine Base and Collector currents by
measuring voltage drop across the 2200 ohm
and the top 680 ohm resistors respectively.
• Graph values and find gradient of graph.
+Red
LED
680
Collector
-ve
collector
Thermistor
base
Base
Swinburne
emitter
2,200
Transistor
680
- Black
Measurements
Voltage Gain
Measurements
Voltage Gain
• Measure the Base voltage between the Base
and the Ground,
• Measure the Collector Voltage between the
Collector and the Ground,
• Graph values and find gradient of graph.
+Red
LED
680
-ve
Thermistor
Swinburne
Base
Collector
2,200
Transistor
680
- Black
"The Brightest Explosions in the Universe - the Greatest Danger
to Life", by Professor Edward van den Heuvel, an astronomer in the
field of High Energy Astrophysics from University of Amsterdam.
Hosted by the Melbourne Planetarium.
Thursday 30 November, 6.30pm - 9.00pm, Cost: Adults $15.00,
Concession $12.50 and MV Members $10.00.
http://vic.aip.org.au/flyer/SW_astro_lecture.pdf
"Space Science in Europe: what we've done, what we plan and
why we do it." Professor David Southwood, Director of Science,
European Space Agency, Paris.
Friday, 8th December, 2006, commencing at 6.30pm.
Village Roadshow Theatrette, State Library Victoria.
http://www.latrobe.edu.au/spacescience/downloads/flyersouthwoodle
ct.pdf