This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit being analyzed. The circuit is from an American magazine from the 90s.
In the figure we have the way to simulate the function S = AB + CD + E (CB + AD) using 5 switches or...
This small transmitter that we found in a 1988 documentation, has a range that depends on the...
This circuit is from a 1984 magazine, but it can be assembled with a BC558 for TR1, BC548 for TR2...