Indicated for applications in the analysis of logic circuits, this circuit was found in 90s Radio Electronics. The circuit generates pulses from 5 to 200 Hz.
This is the basic operational amplifier configuration for gain 10. R2 can be changed to other...
This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967...
The crystal frequency of this circuit found in an American documentation is limited only by the...