Fahrenheit Sensor LM34 (CB14400E)

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

1 kHz Second Order High Pass Filter (CB12574E)
The filter shown in the figure, suggested by Motorola, operates at a cut-off frequency of 1 kHz,...
Continuity test for cables (CB21600E)
The purpose of this circuit based on Maxim's MAX9022 is to find faults in multiple cables. The...
High Input Impedance 250 mW Amplifier (CB14577E)
This circuit is suggested by Motorola in its 1990 Linear Databook. The speaker (or headphone is 32...