1a) First, we have to make sure that the window is left open so that we don’t inhale too many fumes once we start soldering. Before we turn on the iron we also have to wet the sponge that’s on the iron. This way, we can clean the soldering iron as we solder. Next, we turn the iron on, and set the temperature between 4 and 5 on the dial. Finally, before we actually solder, we have to cover the tip of the soldering iron with the soft metal we are using to solder.
1b) We have to make sure that the soldering iron is off. We should also clean the soldering iron off to make sure no gunk is left on it.
2a) We need to check that the red probe is plugged into the right place. If we are measuring current, the red probe needs to be plugged into the one that says “A”
2b)The largest current that my 1.4 W resistors can handle is:
0.25 = 8.93I
I = 0.028 A
Therefore, the smallest resistor the circuit will handle is equal to
8.93 = 0.028R
R = 318.93 Ohms
The smallest resistor that I have that is larger than this resistance is a 330 Ohm resistor.
Using this resistor, my current would be:
8.93 = 330I
I = 0.027 A = 27 mA
Using the multimeter, I measured the current to be 27 mA
3) Calculated values:
I2 = 8.93/1k = .00893= 8.9 mA
I3 = 8.93/1k = 8.9 mA
I4 = 8.93/2.2k = 4.0 mA
I5 = 8.93/3.3k = 2.7 mA
I1 = I6 = 8.9 + 8.9 + 4 + 2.7 = 24.5 mA
Measured values:
I1 = I6 = 25 mA
I2 = 9 mA
I3 = 9 mA
I4 = 3 mA
I5 = 4 mA
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