This precision reference circuit was found in documentation from the 1980s. It applies to other operational amplifiers. The power supply must be symmetrical.
Found in a Popular Electronics from the 90s, this circuit uses a double 555 to emit beeps when the...
This circuit was obtained from National Semiconductor documentation from the 1990s. The circuit has a...
This RF monitor or field strength meter can use instruments from 100 uA to 1 mA full scale. The...