This low power circuit was obtained from an American 80's documentation. The circuit indicates the voltage of a battery being trimmed by the trigger point. The transistors can be the BC549.
This circuit was obtained from an American technical manual from the 80's. The integrated circuit...
Found in a 1980s documentation, this amplifier features high common mode rejection. The operating...
This circuit is from a 1967 RCA documentation. Components can be replaced with modern equivalents. The...