Fahrenheit Sensor LM34 (CB14400E)

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

Tone Control (CB6306E)
This circuit was found in an Electronics World of 1969. The components of the time. The...
Small siren (CB21235E)
Found in an American documentation from the 90s, this circuit makes use of an output transformer for...
1W Amplifier For Headphones (CB12960E)
The circuit shown in the figure is suggested by ON Semiconductor (www.onsemi.com), based on its...