Found in a 90s Electronic Design this circuit provides an additional 12 V output to a 5 V regulator. The maximum current is 200 mA.
This filter that rejects determines frequency (notch) was found in a Popular Electronics of 1993....
Found in Popular Electronics in 1992, this circuit can generate signals up to a few tens of...
This circuit turns on an old cassette recorder when the telephone rings, thus enabling the...