| 摘要 |
A heater controlling circuit is provided to eliminate a dangerous possibility of fire due to a continual operation of a heater by designing an additional circuit to control the continual operation of the heater. In a heater controlling circuit, a micro computer(100) transmits a predetermined signal by sensing an applied power. At least two transistors(Tr1,Tr2) are shorted or opened by receiving the signal of the micro computer(100). A relay is turned on or off according to an operation of the transistors(Tr1,Tr2). A heater(120) is connected with the relay emits heat. The relay is turned on when the whole transistors(Tr1,Tr2) are shorted. |
