- Published in issue 12/1993 on page 48
Regulator short-circuit indicator
Modern integrated voltage regulators are protected against short circuits. but do not give an indication when a short circuit occurs. In the case of regulators with fixed output (78xx) a short-circuit indicator is easily arranged by connecting an LED and series resistor across the regulator output. The LED will light only during normal operation, that is, input available and output not short-circuited.