Setting Up A Breadboard

• Power the breadboard: when powering Nano via its USB connector, it can be powered through the Vin pin (pin 15, bottom left side of the module) by a voltage range from 7 – 21 volts
• Power the breadboard without a microcontroller: the back of regulator faces me, and output pin to red side of the breadboard, central pin to black side. Then DC power is connected to input pin and ground pin

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the difference between a Arduino in or out

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<aside> <img src="/icons/question-mark_yellow.svg" alt="/icons/question-mark_yellow.svg" width="40px" /> the bulb doesn’t light, but there is truly a pressure load on it

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• Don’t connect the two pins of LED into same junction row, because of short circuit

Electronics

• Autoranging meter: only one setting per function
• Resistence of diodes: forward bias: the minimum voltage needed to get current flowing. Before reaching the forward bias voltage, the diode’s resistance is ideally infinite. After reaching it, the resistance is ideally zero.