We found this circuit in a 1977 factory documentation. The operational amplifiers can be 741 and the symmetrical power supply. Capacitors can be changed for operation at other frequencies.
With this power supply it is possible to use automotive devices with currents up to about 8A on the...
This circuit was obtained in a 1980 Hobby Electronics magazine. It is a digital slot machine using...
Found in a 1980s American documentation, this circuit is based on the common CMOS series...