BJT Transistor Bias Voltage Calculator - Calculates for Series Resistor and Voltage Divider
Voltage divider - Wikipedia
Voltage divider with just a single current loop
I = Vin/(R1 + R2) Sparkfun site about Voltage Divider circuits. Potentially useful circuit.
Filters | Capacitive Reactance and Voltage Divider Formula
Voltage Divider Rule
#Potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.