Voltage divider – Setting a fractional voltage

Voltage dividers made of resistors are pretty simple. Series resistors with a voltage across them, split up the voltage in proportion of their resistance.

Simple fixed value resistor trimpot potentiometer voltage divider schematic diagrams by electronzap electronzapdotcom
Simple fixed value resistor trimpot potentiometer voltage divider schematic diagrams by electronzap electronzapdotcom

I assume you already know

Basic properties

  • Higher value resistor will have more of the voltage across them than the lower value resistors they are in series with.
  • Equal value resistor will split the voltage equally.
  • Variable resistor and potentiometers (trimpots) can give whatever voltage you want, within the range they are made for.

Video

Voltage divider basics with fixed equal value resistors and variable trimpot for quick videos 10

More detailed voltage divider lessons at 004 Voltage dividers-trimpot-LDR light dependent resistor-fixed resistor

Diagram

Basic electronics circuit fragments and simple circuits 3 resistive voltage divider using fixed trimpot and light dependent resistor LDR basics diagram by electronzap electronzapdotcom
Basic electronics circuit fragments and simple circuits 3 resistive voltage divider using fixed trimpot and light dependent resistor LDR basics diagram by electronzap electronzapdotcom
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