# Circuit Simulator - 555 Sawtooth Oscillator

## Why 555 Sawtooth Oscillator?

Learn about 555 Sawtooth Oscillator to improve your skills and design your electronics projects yourself.

## Where can I get 555 Sawtooth Oscillator Circuit Diagram with Explanation?

IndiaBIX provides you lots of fully solved 555 Sawtooth Oscillator circuit diagram with detailed explanation and working principles.

## How to design a 555 Sawtooth Oscillator (electronic circuit)?

You can easily design the 555 Sawtooth Oscillator circuit by practicing the exercises given below. Here you can design and simulate your own electronic circuits with this Online Circuit Designer and Simulator.

### Circuit Description:

This is a simple sawtooth oscillator using a 555 timer chip.

A timing interval starts when the trigger input ("tr") goes lower than 1/3 Vin, or 3.33V. When this happens, the 555 output goes high, and the 555 waits for the threshold input ("th") to reach 2/3 Vin, or 6.67V. A PNP transistor acts as a current source to steadily charge the capacitor. The threshold input slowly rises until it reaches the required level. Then, the timing interval ends, and the capacitor is quickly discharged through the "dis" input.

When the capacitor is discharged enough so that the trigger reaches 3.33V, then a new timing interval begins. The end result is a sawtooth wave. -- Credits: Mr. Paul Falstad.

 SURAJ.S said: (Mar 29, 2014) I have a doubt, what's the equation that relate frequency of sawtooth, R & C.

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