This variable frequency oscillator with the 4093 was found in a Popular Electronics from the 90s. The table gives the component values for various frequency ranges.
We find this circuit in a 1976 NASA handbook. The circuit can be designed based on current logical...
In the circuit shown in the figure when we press S1, capacitor C1 charges slowly, and with that it...
This circuit is from a 1968 Motorola power circuit manual. The circuit uses transistors of the...