Fahrenheit Sensor LM34 (CB14400E)

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

Flashlight Remote Control (CB10851E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Varicap Oscillator (CB15538E)
Using a 100 uH inductor for L1, this circuit will oscillate around 1 MHz. The frequency will be...
Solenoid Driver (CB5184E)
This low current solenoid driver was found in an ancient American documentation. The solenoid must be...