For the first item on our agenda, I was given the opportunity to play with a breadboard using resistors, LEDs, and my custom power supply. LEDs light when completing the circuit, and resistors add resistance to the circuit, restricting current provided by the power source. The greater the current received by the LED, the brighter it lights.
A breadboard circuit with two resistors, three LEDs, and power.
Next was to test batteries using a multimeter. The "1.5 V" batteries measure higher than 1.5 V on the multimeter when they're new, and older ones register much lower voltages.
The two multimeter nodes held above a battery.
Just as previously understood, our power outlets provide a ~120V output.
Multimeter testing the alternating current voltage of the outlet.
The last item was to compare the voltage output of an old unregulated power adapter with a modern regulated adapter. The regulated adapter automatically adjusts the output based on how much resistance is in the circuit, so the voltage is consistent. We found that this was not the case for the unregulated adapter, as putting the wrong amount of resistance in its circuit would result in burning out the resistor.
Fortunately for me, I've got a modern power adapter.
Fortunately for me, I've got a modern power adapter.
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