This RCA / GE circuit from the 90s can be applied to any modern operational amplifier. The number of entries (installments) can be changed depending on the application.
This circuit is from a Radio Electronics magazine from December 1958. The indicator instrument is analog...
This circuit sends signals to a shortwave radio (range 3 to 7 MHz) at a distance of a few tens of...
This circuit was found in an Electronics World of 1968. It can be applied to any modern triac and...