Strobe (T461E)

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

Wien Bridge Oscillator (CB3913E)
This circuit generates low-frequency sinusoidal signals. The variable capacitor is dual and the...
Liquid Level Alarm (CB5310E)
This circuit was found in a 1980s documentation. It triggers a relay when liquid from a reservoir...
AC Voltage Follower 741 (CB25792E)
This circuit was found in the January 1995 Electronics Now magazine. Its configuration is valid for...