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.
The circuit presented was found in the National Semiconductor Linear Applications Handbook. The...
The circuit in the figure generates a negative pulse when it receives an appropriate stimulus at...
When S1 is in 1, the circuit operates with of half the total power applied to the load. When in...