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 found this circuit recent English documentation. The circuit uses a common transformer and can...
Found in a 1969 neon lamp publication, this circuit provides two voltages under very-low currents....
The MC1556 integrated circuit is an operational amplifier from Motorola. The circuit is from a...