Monochrome TV Pattern generator (CB9421E)

Using an integrated circuit from the time, this circuit was found in Radio Electronics from the 90s. The ZNA234E is an unusual component today.

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Motorbike or Motorboat Noise (CB12646E)
This circuit was obtained in an old American publication from 1978. It can be assembled with a...
Frequency Divider Using the 4017 (CB209E)
Decade counters, such as the 4017, can be cascaded as sourcing signals with the frequency divided...
Timer for industrial applications (CB10193E)
This circuit uses a dual-gate MOSFET, a rare component today. We found it in American...