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1. The figure on the right shows the pin connections of the transistor as seen from underneath. Keep in mind that you will be looking at the board and the transistor from above. Therefore the pinout will look like the image on the right.
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2. The resistance value of a resistor is indicated by four colored bands
using the following color code:
black = 0, brown = 1, red = 2, orange = 3, yellow = 4,
green = 5, blue = 6, purple = 7, grey = 8, white = 9.
The first band gives the first digit of the resistance value,
the second band the second digit, the third band the number of
zeros following the first two digits, and the fourth band gives
the margin of error allowed to the resistance value: A silver
band indicates an accuracy of "
10 %, and a golden band an accuracy of "
5 %. As a base resistor you should thus use one with a brown band
(1), followed by a black one (0), followed by yellow band (4 zeros)
indicating a resistance of 1 0 0000 or 100 kW.
There should also be a silver band following the yellow, indicating
that the accuracy of the resistance value is 10%.
3. Use the "OpAmp Designer Board" to put together the circuits that you want to study. Make sure you understand the function of the various controls and the polarity of each element. If you need help please ask your instructor. The relevant components of the designer board and their internal connections are shown in Fig. 8.
Figure 8: Op-amp designer board. The small circles represent sockets that components can be plugged into. The lines show which of the sockets are interconnected underneath the board. The two upper slide resistors are connected to two independent power supplies whose output voltages, variable between 0 - 15 V, are present at the pin connectors beneath. The components marked with a cross are not used in this experiment. The horizontal rows of sockets should be interconnected in the middle with jumper wires as shown. Use the variable supply on the left to adjust the collector voltage VCE from zero to 10 V.
4. IMPORTANT NOTE: The power supplies will put out a maximum voltage of 15 V that can overload the transistor. Don't exceed a collector voltage of 10 V in connection with the circuit shown in Fig. 6 of "theory".
5. The milliammeter measures IC, and the voltmeter can be moved to measure VCE or VBE. The power supply on the left can be adjusted from zero to 15 V. This means that the base current, IB, available through the 100 kW resistor (105 ohms) in Fig. 6 will vary from zero to 150 microamps, it should be measured with the Thornton meter. Keep the connecting wires short and the wiring neat, this will make it easier to find wiring errors, (don't forget to strip off the insulation at the ends). Lay out your circuit from the beginning so that you can use it with minor alterations for all experiments:
