Found in a 1970s American documentation, this circuit uses components from the era that can eventually be replaced by modern equivalents. The power supply must be symmetrical.
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...
This circuit aims to take advantage of two old telephone sets in an efficient domestic intercom...
This circuit can be used for signaling a panel with a common incandescent lamp. The lamp will...