Positive to negative voltage converter (CB20998E)

This circuit was found in old Maxim documentation. Check the availability of the IC if you are going to build the circuit. The output current is 1A.

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Reversible shunt motor control (CB8012E)
Found in Motorola's 1968 documentation, this control appears elsewhere in this section. The bridge...
Laser Simulator 555 (CB7842E)
This circuit uses a high brightness LED to simulate a LASER. We found it in a 1991s PE Hobbyst...
Sound switch (CB21740E)
This circuit was found in Popular Electronics from 1969. The circuit uses a small speaker as a...