Fahrenheit Sensor LM34 (CB14400E)

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

Voltage Follower LM308 (CB4491E)
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...
ER11 High Isolation Power Transformers (COM182E)
January 2017 - Pulse Electronics ER11 transformers with high insulation can be obtained from...
3 Hz to 300 kHz Linear VCO (CB8744E)
This circuit was found in a 90’s Electronic Engineering. The integrated circuits are of the time...