Timed Alarm (CB6423E)

We found this circuit in a 90's Popular Electronics. The circuit produces a loud sound if S2 is not pressed to reset.

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Crystal Oscillator (CB6146E)
This Linear Technology circuit was found in a 1980s documentation. The circuit can swing up to a...
Wideband Oscillator or Amplifier (CB6347E)
This circuit was found in a NASA documentation from the 1980s. Component values are application...
TTL to CMOS Converter (CB9615E)
In the figure we have the basic configuration for interfacing TTL logic with CMOS logic. The...