Product detector (CB9684E)

Found in Motorola documentation from the 1980s, this circuit employs an integrated device from that time, which is unusual today.

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Negative Voltage Generator with the 555 (CB12324E)
This configuration can be found in other articles on this site. This was obtained in 1998...
Noise Generator (CB5432E)
This circuit generates both white and pink noise. The transistors can be BC548 and the power...
Solid state relay (CB8395E)
Found in 90s Radio Electronics, this shield can control high voltage loads in the power grid....