you should be able to say what the circuit is used for and be able to explain how it operates. This transistor switching circuit uses an npn transistor, a voltage divider (consisting of a \(5 kΩ ...

The two resistors may have fixed values or one may be an LDR, a thermistor or other input device. The supply voltage is divided in the ratio of the resistances in the voltage divider. For the ...

Normally you’d throw in some resistors to form different voltage dividers depending on which key is pressed, and read the resulting voltage off of a voltage divider with an ADC. But that means ...