Voltage Divider
A voltage divider produces an output voltage that's a fraction of its input voltage, determined by the two resistors R1 and R2.
The output voltage is determined by Vo=Vi(R2/R1+R2).
Resistor dividers are often used to generate reference voltages or as level shifters; their high impedance means that attempting to draw significant current from them will cause the voltage to vary.
@BasicElectronics
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