Re: Please suggest a time delay toggle switch

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?

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