sweeping freqs using 74HC14

Thread Starter

Kezz

Joined May 2, 2006
5
Hi.

I have an assignment at uni. left it kinda late but need to implement a siren sound using a inverting schmitt trigger.

idea is to sweep a rang of frequencies and out put the sound to a speaker. but you can only use the 74HC14 IC .

If anyone has any ideas or circuit diagrams or anything that would point me in the right direction or help that would be greatly appreachiated.

Cheers.
 
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