Before soldering, make sure the sponge is moist, and there is solder within reach. Turn on the iron and dial in the heat (around 4.5 on these ones) and wait until it is at a good temperature to properly melt the solder. Make sure the tip is clean.
After soldering, make sure to place the soldering iron into the holder turn it off. Make sure any mess is cleaned up, things are left organized.
Before using the multimeter, make sure the probes are attached to the correct inputs (left for measuring current, right for anything else). Also make sure the dial is set to the correct thing to measure.
Resistor Calculation Thing
I = 0.25 / 9.58 = 0.0261 Amps = 26.1 mA
Minimum [theoretical] resistor (ohms) = 9.58 / 0.02609 = 367.19Ω
Minimum [actual] resistor: 470Ω
Minimum resistor I = 9.58 / 470 = 20.2 mA
Measured: 20 mA
Kirchhoff’s Current Law
Total R = 1/((1)+(1)+(1/2.2)+(1/3.3)) = 0.363k = 363Ω
I1, I6 = 9.58V / 363 = 26 mA
Measured: 22 mA
I2, I3 = 9.58 / 1000 = 9.6 mA
Measured: 8 mA
I4 = 9.58 / 2200 = 4.4 mA
Measured = 4 mA
I5 = 9.58 / 3300 = 3 mA
Measured = 3 mA