Broadband amplifier (CB9179E)

Found in an old Popular Electronics, this circuit has a gain of 20 dB. The integrated circuit is uncommon today.

Position indicator (CB17588E)
The relay of this circuit closes when the position set in P2 is reached by the sensor...
Flame Detector (CB17547E)
This circuit is intended to monitor the flame of gas heating systems that must always have a small...
TTL Clock LM311 (CB20622E)
This circuit makes use of an old operational one to generate clock signals that depend on the...