On Thu, 26 Jun 2008 07:38:35 -0700 (PDT), steve <kvsteve@[EMAIL PROTECTED]
>
wrote:
>Since the 9v battery supply is quickly used up, I am using a ac
>battery eliminator/wall wart to run the Led timer.
>
>Although the eliminator provides the needed 12v to 15 v, it also
>changes the 50 hz dramatically to several khz.
>
>The khz output from the eliminator completely upsets the 555 timer
>input, so there is no timing available from with the circuit.
>
>I tried a 1000uF with several diodes placed at the eliminator’s
>output, but there is hardly any production of dc.
"the 9v battery supply is quickly used up"
Seems like this is the problem, you are drawing to much current from
the output of the 555.
I would suspect this is why the 1000uf cap didn't help.
Good Luck,
* * *
Christopher
Temecula CA.USA
http://www.oldtemecula.com
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