555 Astable Oscillator | Electronic Project Circuits

Posts Tagged ‘555 astable oscillator’

Noise generator 2 frequency with ic 555

This is a simple noise generator circuit. An IC Timer IC 555 is a number of major equipment. Small circuit. Suitable for various test circuits.
Operation of the circuit is when the power supply to the circuit. It will give birth to high frequency by using a circuit IC1 to a multi-state Devices Bill Brett Foster. The frequency with which R1, C1 and C2. The frequency will be out in three legs. And will be expanded with the IC2 output pin out of 5 in order to drive the speakers. The high-frequency sound. But when the switch S1, capacitor.
C1, which continue to cycle in a manner parallel to the C2 value higher density. IC1 will give birth to low-frequency out of pin 3 to IC2 then drive the speakers. This circuit can cause the audio source has two frequency.

Be the first to comment - What do you think? Posted by admin - November 18, 2010 at 1:52 am

Categories: Oscillator generator Tags: 555 astable oscillator, noise source circuit

Annoying high pitch noise generator by 555

This is a simple high pitch noise generator circuit. It has a timer oscillator with a frequency variable from 15khz – 30khz.
The circuit can be mounted in a plastic box like I have done. The good thing about high frequency sounds is that it is very hard to find where they are coming from. Also, the noise is very annoying and irritating. The crystal speaker is the creamy coloured thing at the bottom of the photo on the left.

Read More Source:http://www.geocities.com/electronics3456/highpitch.html
Thank you.

Be the first to comment - What do you think? Posted by admin - April 28, 2008 at 11:53 am

Categories: Oscillator generator Tags: 555 astable oscillator, 555 timer oscillator, Oscillator generator

Simple Pulse Generator by IC 555 Timer

This is a simple pulse generator circuit or standard astable oscillator circuit for IC 555 timer,NE555N IC.
Use for digital Logic circuit. IC 555 use voltage supply 5V to 15V.
the output frequency will be approximately 1kHz and the duty cycle 50-50, The output’s frequency is control by R1.
Detail more, Please read in this image circuit.