Brief fixed resistor voltage divider circuit

Table of Contents

Series components always split up the supply voltage (Kirchhoff’s Voltage Law).

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Diagram

Whatever you attach to the output will become part of the resistor based voltage divider. So you usually don’t want to try to power anything, but to instead use the voltage as an input signal for some kind of amplifier that just looks at the voltage and doesn’t let hardly any current flow through it. Topics covered later in this series. Brief NPN BJT emitter follower set by trimpot using 2N3904 bipolar junction transistor

Simple voltage divider schematic circuits diagram by electronzap electronzapdotcom
Simple voltage divider schematic circuits diagram by electronzap electronzapdotcom

Resistance based components divide up the voltage based on the percentage of resistance that heads to each of the power supply voltages in relationship to the output node.

Many circuits depend on using fixed value resistor voltage dividers to set a specific fraction of the supply voltage to part(s) of the circuit. The 555 timer integrated circuit (IC) does so internationally to get 1/3 and 2/3 supply voltages.


Video

Quick explanation of fixed resistor voltage divider circuits by electronzap electronics

Bonus video:

How to divide supply voltage in thirds with a fixed resistance divider electronics DIY tutorial

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