This 1967 Motorola circuit is intended for operation with signals up to 250 MHz delivering a 50 MHz signal at the output. The transistor is the MM1941, uncommon today.
With the coded activation of the relays, it is possible to control which of the 16 outputs...
The integrated circuit used in this application is not very common. Transistors and resistors...
This simple circuit makes use of neon lamps to indicate the voltage of a power grid. The lamps are...