This circuit is from an old Japanese publication of 1962. The circuit uses two batteries, one for the filaments of the tubes and the other one of high voltage for the plate circuits.
This circuit with the ULN3784B appeared in the October 1984 issue of Radio Electronics magazine. It can...
The circuit shown in the figure was suggested by National Semiconductor in its 1994 Linear...
The 74123 TTL integrated circuit consists of a monostable that can be configured to generate...