This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an automatic transmission circuit for telegraphy. The circuit is TTL.
We published this circuit in a magazine of the 90s, but it is still present by the components it...
The circuit is from the 1990 Motorola Linear Databook, but can be implemented with other operating...
This circuit was found in the January 1996 issue of Electronics Now magazine. The circuit is...