This circuit, which can be used as a shield, was found in Radio Electronics from the 90s. The operating circuit can be replaced by a lower voltage equivalent.
This experimental TTL circuit is from 1992 documentation. It produces programmed sounds set in the...
This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not...
In the figure we have a circuit that fires from a positive pulse of short duration applied to its...