Instructables

How do I make a Square Wave Generator?

I need to make a square wave generator for a project. Does anyone know how to build a square wave generator that can generate a frequency 100-150KHz? 

Check out this PDF. You'll find the answer there.

Qa
Maybe you could use the old oscillator-from-cmos-inverters-trick:
http://www.fairchildsemi.com/an/AN/AN-118.pdf
inverter-oscillator.png
seandogue3 years ago
555 followed by any of dozens of logic chips will produce a nice clean square wave
(555 produces your clocking signal, and the logic chip gives you a really nice high rate-of-change edge) I prefer the easy method of using a 555 setup in astable mode with a pot for frequency control, then following the 555 with a74000 or 4000 series counter chip to define a true 50% duty cycle signal. Cheap as sin and educational, as well as easy to design and build...it's all cookie cutter from the data sheets.
lemonie3 years ago
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!