Engineering Design Passive Parts Utilities

Calculate the optimum R and C values for filters

Use this Javascript utility to find the optimum R and C values for single pole filters at a given frequency.

Voltage Divider Calculator

Use this Javascript utility to find the best set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attenuation circuits.

Parallel Resistor Calculator

Use this Javascript utility to find the optimum resistors to place in parallel to create a non-standard value.

Parallel Resistor Calculator - When One Resistor is Known

Use this Javascript utility to trim a known resistor down to another resistance.

Series Capacitor Calculator

Use this Javascript utility to find the optimum capacitors to place in series to create a non-standard value.

Making 1% Resistor Values from 5%

This table shows how to create any 1% resistor value out of resistors in the 5% sequence.

Making 5% Capacitor Values from 10% and 20%

This table shows how to create any 5% resistor value out of capacitors in the 10% and 20% sequences.

Standard Resistor Value Selection

This Javascript calculator provides a simple way to select the closest standard resistor values when an arbitrary value is entered. In addition, the calculator can be used to select standard capacitors or inductors.

4 Band Resistor Color Code Calculator

This Javascript calculator provides a simple way to read the color bands on an E24 4 band resistor.

5 Band Resistor Color Code Calculator

This Javascript calculator provides a simple way to read the color bands on an E96 5 band resistor.

E24 4 Band Resistor Color Code Chart

This table shows how to read the color bands on an E24 4 band resistor.

E96 5 Band Resistor Color Code Chart

This table shows how to read the color bands on an E96 5 band resistor.

Amplifier and Comparator Design Utilities Home