Fahrenheit Sensor LM34 (CB14400E)

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

Oscillator 4011 (CB14983E)
This adjustable oscillator has the traditional configuration already presented in other articles. The...
Bicycle speedometer (CB7382E)
This circuit appears in other versions on this site. obtained from other publications. This is...
1800 Hz Decoder (CB20352E)
This circuit decodes a 1800 Hz tone used in communications. The circuit is from an American...