Oscillator for the medium wave range (CB21140E)

This ground-based circuit was found in 1990s American documentation. The transistor can be any general-purpose equivalent.

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Water Level Control (CB5314E)
This water level control circuit was found in a 1980s documentation. The circuit uses a capacity...
One-of-Eight Data Selector - 4051 (CB190E)
Figure shows the basic application of a data selector using the 4051 . The same configuration is...
Sound controlled lamp (CB7198E)
Found in a 1966 General Electric documentation, this circuit controls an incandescent lamp from an...