Re: Please suggest a time delay toggle switch

On 7 Sep 2005 08:14:45 -0700, mingyan_chow@xxxxxxxxxxxx wrote:

>Absolutely correct. One button selection is really limited. However,
>this application is only for my turntable. I can get used to it. i.e.
>press the button to "On" 33. Press again, "Off". While play 33 want to
>switch to 45. Turn it off, then press the button long enough to toggle
>45 oscillator.
>I think I got a workable circuit on my bread board now. Question, how
>to feed two oscillator output to op-amp circuit.
>The existing circuit has a 22K resistor connected to 4013 clock output
>pin 12 (pin 12 connected with pin 5), 22 K is then connected with 5K VR
>to set level. and other end of 5KVR connected with a 22U cap. to
>ground. Output of 5K VR connect to LM324 via a 56K resistor.
>Since I duplicated the same oscillator, can two oscillator ouput
>connect to the same op amp input?

I've posted a complete solution for you on abse, under "Please
suggest a time delay toggle switch [from sed]" , but since you
can't get to the binary groups with google, I've also emailed it to
you.

If you need a circuit description, ask and I'll post it here.

--
John Fields
Professional Circuit Designer
.

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