PROTECTING CIRCUIT OF SPEAKER SYSTEM

摘要

PURPOSE:To ensure easy viewing of the breaker action, by connecting two light emitting diodes which are connected in adversely parallel to each other. CONSTITUTION:A protecting circuit connected in adversely parallel to a breaker 1 of a series circuit of light emitting diodes 4 and 5 and a resistor 2 is connected in series to a speaker unit. When the breaker 1 opens due to an excessive input, etc., a minute audio current which is limited by the resistor 2 flows to a disply circuit consisting of the resistor 2 and diodes 4 and 5. Then the diodes 4 and 5 emit the light to positive and negative half waves of the audio current respectively.