This is a very basic oscillator. All elements are inverters.
Start with pin 10 is 0 volts. Pin 12 has 15 volts (the power supply voltage is 15 volts). The capacitor is charging. What happens next?
The 47k can be 1 M or more, just protection.
Start with pin 10 is 0 volts. Pin 12 has 15 volts (the power supply voltage is 15 volts). The capacitor is charging. What happens next?
The 47k can be 1 M or more, just protection.
OSC
attach oscilloscope to pin 8 can't see wave. Maybe i am test incorrectly because I tried two ICs. Cap is marked "122". Only one in my home. I dont know how to test the 12oopf cap.
attach oscilloscope to pin 8 can't see wave. Maybe i am test incorrectly because I tried two ICs. Cap is marked "122". Only one in my home. I dont know how to test the 12oopf cap.
I notice from your schematic that the 4069 is fed with 25 volts in total 
Datasheet says 15 volts max if I remember correctly.
122 is 1200 pF (and hardly broken) but if you want to test you can take 1 uF and 1 Mohms this will create a real slow oscillator. Don't forget to tie the 3 free inputs to either ground (pin 7) or supply voltage (pin 14).
Datasheet says 15 volts max if I remember correctly.122 is 1200 pF (and hardly broken) but if you want to test you can take 1 uF and 1 Mohms this will create a real slow oscillator. Don't forget to tie the 3 free inputs to either ground (pin 7) or supply voltage (pin 14).
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