Fahrenheit Sensor LM34 (CB14400E)

This circuit measures temperatures from +5 to + 300º F using a sensor from National Semiconductor not very easy to obtain.

Emitter Follower Detector (CB12236E)
This circuit is suggested by an English publication from 1980. It is an RF detector that uses a...
Phonographic preamplifier (CB8249E)
This circuit was found in a Electronics World of 1968. The integrated circuit is the MC1320P from...
Power Zener (CB15011E)
The presented circuit simulates a high power zener that depends on the characteristics of the...