Can someone please explain how C1 can charge//discharge when one of its terminals is connected to the very high impedance of the op-amp inverting input input and the other terminal is tied to ground? It would have to be a very low value capacitor to exhibit any useful change in charge, would it not?
But the second schematics has incorrectly connected R3. It must go to the ground to match the equations 1 and 2. Thanks to the author to keeping our brains working 😂
@@vlastimilelias I haven’t verified your claim independently, but in the absence of an argument to the contrary, I’ll take your word for it. Thanks for letting us know.
How would you qualify the "timer/oscillator" circuit in the noise Circuit of the Roland TR-909 drum computer? Using either Cd4030 or Cd4070. What kind of math would apply there to calculate speed?
