## Soldering and Desoldering

In the last lab, solderless breadboards were covered. This time, soldering and desoldering of components on a breadboard will be the topic. During the lab, the proper way of soldering will be demonstrated.

To practice soldering, you will solder series and parallel combinations of the resistors provided in class on a breadboard. The followings are again the formulas to use and figures of how they should be connected:

Serial combo: R = R1 + R2 + ...

Figure 1 - Series Resistors

Parallel combo: 1/R = 1/R1 + 1/R2 + ...

Figure 2 - Parallel Resistors

You could use the resistor color codes to find out the theoretical values of the resistors and once you have the measured values, you are to use the following formula to find the error percentage.

% Error = (| Theoretical Value – Measured Value| / (Theoretical Value)) * 100%

For additional practice, next you apply a 12V power (from Agilent E3631A) to the input of both combinations (Series and Parallel Resistors) and measure the voltages across each resistor using a multimeter (Fluke 179) and record your results. Here are the figures of how the connections should be made:

Figure 3 - Series Resistors with Power Supply

Figure 4 - Parallel Resistors with Power Supply

Please show me your results at the end of the session. You are to desolder the connections at the end of the session.

Here is again the Resistor Color Codes: