The circuit presented is a Japanese commercial radio for AM with 50 mW of output power, powered by 9 V. The circuit is from the 60s, having been found in documentation of the time.
This circuit marks the number of minutes of a telephone call on a display, starting when the...
This circuit was obtained from a 1966 General Electric documentation. It can serve as a basis for...
This is a change from the previous interface, also used an uncommon operational one today. The...