Investigating the Transistor: A hands on activity.

1
Investigating the TransistorA 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.

2

• Brief Instructions

3
Components
4
Assembly

• Place each component, except the thermistor,
  through its corresponding holes in the card,
• Ensure correct orientation.

5
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.

6
Operation

• Set power supply to 9V, LED should go on.
• Cool thermistor with the ice block in the bag,
  the LED should go off.

7
Measurements

• Current Gain

8
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.

Collector
Base
9
Measurements

• Voltage Gain

10
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.

Collector
Base
11

• "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_lectu
  re.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/d
  ownloads/flyersouthwoodlect.pdf