This circuit, already explored on this site, can be applied to other comparators in the same series. Power depends on the application. The circuit can be used as a shield.
This circuit was obtained from a Radio Electronics in May 1967. The circuit consists of a system...
This simple two-transistor capacitance meter uses a 50 uA microammeter as an indicator instrument. The...
Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to...