Telephone Dialer (CB5979E)

This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference, as this type of dialing is no longer used today.

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Signal Detector (CB24692E)
This circuit can be used to detect the signals from the previous circuit or from any radio...
Digital accelerometer (CB21045E)
Found in Popular Electronics from the 90's, this circuit makes use of components from the time. |...
Shortwave receiver (CB21205E)
This receiver for frequencies up to 18 MHz was found in American documentation from the 1990s. Data...