High current buffer (CB7280E)

Suggested by Popular Electronics, it is a digital amplifier, for pulses with frequencies up to a few megahertz.

Heads and Tails (CB4539E)
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
Internal telephone exchange up to 9 extensions (CB17649E)
Here is a very useful circuit that can be expanded, including the use of more integrated circuits...
Monostable 4001 (CB25118E)
This two-port configuration of the 4001 was found in the April 1988 issue of Radio Electronics magazine....