Scanner squelch (CB9424E)

Found in Popular Electronics from the 90s, this circuit mutes a scanner's speaker in the absence of a voice signal, thus eliminating the hiss.

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Current Sensor LT6102 (CB5232E)
This circuit was found in the 2005 Linear Technology Linear Circuit Manual. It is a sensor with large...
Temperature Sensor TMP390 (CB20399E)
This is an example of a temperature sensor shield using the Texas Instruments TMP390 obtained from...
VCO with Potentiometer Control (CB13130E)
In the figure we show how to add a 100k ohms potentiometer to implement an oscillator controlled by this...