555 Timer Function Generator

Basic description shows how you can build simple square wave 1hz-1Mhz square. very useful for testing speakers, transformers, relays, transistors, IC, etc..

you can watch the movie in bellow link:

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Comments

[john1a]

A 4-digit display (showin gthe current frequency) would be a great addition!

[kag432]

I would be interested to see if you ever modify it to have sine and square waves as well.

[kag432]

Oops meant triangle not square.

[Applied Electronics]

you can watch the movie in bellow link:

http://www.youtube.com/watch?v=lbGLCDmq1Wo&list=PL-DYRTx2yMmnM4w-YxNGwRg30SBGrpSpF