"semaj" <semajx7@xxxxxxxxx> wrote in message
> This 4060 timer chip, is it also known as M54HC4060? Thanks.
Not exactly sure... the article only says "4060 Ripple Counter"
Here is an update on the schematic... I added some relays to control the
This should work.. no guarantees because I haven't built it to make sure it
would work :) .. logically and on paper it should...
I have made 2 schematics, one showing the positive cycle
www.audiopulse.net/timer1.jpg and one showing the negative cycle...
You will notice that with each 15 minute pulse of the 1st relay, the other 2
relays will switch polarities on the output you are needing switched...
giving you the cycling you wanted... +9v for 5 minutes then -9v for 15
minutes then back to +9v for 15 minutes and so on....
Hope this helps