Telephone dialer (CB9235E)

This circuit was obtained in Radio Electronics from the 90s. The integrated circuit is uncommon today.

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Curve plotter (CB13946E)
We found this circuit in a publication for radio amateurs in 1977. The circuit allows the...
Triac Control Without Hysteresis (CB5275E)
This circuit was found in an American documentation from the 90's. The circuit can use almost any...
15 W Near Complementary Amplifier (CB6280E)
This circuit was found in an Electronics World of 1968, making use of components of the time, not...