Hello,

I need to build a simple square wave oscillator for my assignment. I want a square wave and I want to sweep through frequencies using some kind of knob .(If it doesn't complicate things too much.) I don't know my options as the output but a mini speaker would be awesome. I'd be glad if you can share some schematics and list what I need.

Best Regards,
Luc.

 

Hello,

In this page of the EDUCYPEDIA you will find links with some designs:
http://www.educypedia.be/electronics/analogsquare.htm

Bertus

 

Here's another link that provides square-wave oscillator designs:

http://www.discovercircuits.com/O/o-sqwave.htm

 

Thanks for the links. However I'm not that good with schematics so I couldn't make much of it. Can anyone suggest me a site that describes the application? What i need is really basic, I have a 555 timer chip,resistors,capacitors,potentiometers and 10V speaker. I need to oscillate a square wave and sweep with the pot..
Thanks in advance..
Luc

 

Top of this page, Vol VI, experiments, chapter 8, 555 hysteritic oscillator

 

if its not already too late (but its never to late to learn ha) here is a great page on 555 timer. U need to connect pin4 to 5v (pin8) in order for things to run smooth. Sometimes thats overlooked in tutorials.
Look at astable mode
http://www.unitechelectronics.com/NE-555.htm