Strobe (T461E)

Found in Popular Electronics from August 1968, this circuit makes use of a strobe tube from the time.

4060 Touch Switch (CB3850E)
This circuit uses one of the 6 CMOS inverters of a 4060 as a touch on / off switch. The power...
Field Strength Meter (CB22025E)
This aperiodic circuit was found in an old English documentation. The transistor can be any JFET...
Light Alarm 741 (CB20305E)
This circuit can function as both a light alarm and a shadow alarm. The components are common. The...