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using 555 timer

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waqar

New Member
Is there any schematic avaiable on the net or can any one please guide me how to use 555 IC for the following purpose

1) Telephone Dial Tone Generation

2) Busy Tone

3) Ring Back Tone

using one IC only
 

Chippie

Member
waqar said:
Is there any schematic avaiable on the net or can any one please guide me how to use 555 IC for the following purpose

1) Telephone Dial Tone Generation

2) Busy Tone

3) Ring Back Tone

using one IC only
Have you tried searching for a schematic?
 
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