For example, you can insert a resistor, a capacitor, an inductor, a diode, or a transistor and get a readout of which pin is which. It seems like magic, but [Andreas Spiess] did the research on ...
The transistor is on, when the input voltage is greater than or equal to \(0.7 V\). The transistor is off if the input voltage is less than \(0.7 V\). The mosfet is on, when the input voltage is ...