This circuit for the 40 MHz band was published in Radio Electronics magazine in December 1957. Its purpose was to monitor the signals of the Russian satellite launched at the time.
This circuit is a small FM transmitter, capable of carrying its signals over short distances...
The purpose of this circuit is to obtain a voltage of 15 V with 1.5 A from a 48 V input. The...
This simple circuit must be powered by a voltage of 5 V. The integrated circuit is the 7400, but...