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.

MeasurementsCurrent Gain

MeasurementsCurrent 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.

-ve

Swinburne

+Red

- Black

2,200

680

680

Thermistor

Transistor

LED

emitter

base

collector

Base

Collector

MeasurementsVoltage Gain

MeasurementsVoltage 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.

-ve

Swinburne

+Red

- Black

2,200

680

680

Thermistor

Transistor

LED

Collector

Base

"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/flyersouthwoodlect.pdf