Metal detector (CB7888E)

This circuit was found in a 1970s RCA publication. Transistors support modern equivalent types. Observe the dimensions of the explorer coil.

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Light Level Indicator (CB18640E)
This circuit fires when the light intensity on the sensor drops below a certain level. The trigger...
10 Channel Remote Control Decoder (CB9984E)
This circuit consists of a decoder for remote control that allows the activation of 10 channels based...
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This circuit is used to test PNP or NPN transistors giving the status indication through LEDs. The...