This Kirlian machine circuit uses a car ignition coil. The circuit is from a Radio Electronics from May 1986. It is mentioned in an article that teaches how to obtain photographs.
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....
We obtained this circuit from a 1993 documentation. The circuit has 7 current ranges that are...
This circuit was found in an 80's General Electric documentation. The circuit uses uncommon...