Soldering, AC Power, and Function Generator Lab

Soldering, AC Power, and Function Generator Lab

 

Names: ______________________________________________________________

 

Background

 

1.  Soldering

 

      a.  This lab requires the use of a light bulb. The bulb and the socket will be provided.      

      b.  Connections must be soldered to the connector in order for it to fit in the breadboard.

      c.  Use two short connectors from the box provided.

      d.  Solder them to the base of the bulb holder as illustrated by the instructor.

 

2.  AC power

 

     a.  With the DC power batteries we have been using, the current flows in one direction only.

     b.  The the current in AC follows a sine wave patten. It alternates from positive to negative

          (changes direction). The frequency, measured in Hz (cycles per second) is a measure of

          the rapidity with which it changes direction.

     c.  A cycle is defined as a complete set of positive and negative values. 

     d.  The frequency is defined as cycles per second or Hz

 

3.  Function Generator

 

     a.  The function generator is a very useful instrument for evaluationg electrical circuits.

     b.  This lab introduces the Tektronix CFG250 function generator; it will be used in a number

           of future labs. Essential components of the function generator are provided below.

 

The Lab

 

1.  Use a breadboard to connect the following circuit. The power supply is AC as covered below.

 

 

2.  Adjust the function generator as described below.

     a.  Set the volts out to the high range (button out).

     b.  Set the amplitude to the mid point

     c.  Set the function to sine wave

3.  Set the Hz range to 1.

     Adjust the frequency knob from 0.2 to 2.0

    

What happens as you increase the frequency?

 

 

 

4.  Set the Hz range to 10.

     Adjust the frequency knob from 0.2 to 2.0

 

What happens as you increase the frequency?

 

 

5.  Explain how you could use the data to estimate the frequency of the AC. 

 

 

Tektronix CFG250 Function Generator

 

 

 

1.   Power button: Push to turn on or off

2.   Power on light

3.   Function buttons - set to sine wave (push button on far right)

4.   Range buttons - set to frequency range desired

5.   Frequency control - set to frequency desired

6.   Amplitude - Depending on position of Volts Out button, determines signal level - set

      to mid range.

7.   Volts out range button. Set to range desired - we will be using 9 volts, so should be in

      out position.

10. DC Offset. Pull this control out to activate The control sets teh DC leval and polarity of the

      signal at the Main output. When the control is pressed in, the signal is centered at zero V dc.

14. Main output connector - insert red and black prongs into the breadboard input receptacles.

Remainder of buttons - do not use