| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the dark current through establishment of an optimum starting system of a control circuit, enhance the EMC endurance by means of optimum impedance design, and simplify the circuit operation and suppress the costs by establishing a proper feedback system for the oscillating operation. SOLUTION: A blinking circuit for a turn signal lamp to work also as a hazard lamp of a vehicle such as a car is composed of a switch mechanism 1 manipulated by the driver, a control mechanism 2 to make a control in linkage with the switch mechanism 1, and a lamp mechanism 3 to perform indication interlocking with the switch mechanism 1 and control mechanism 2. The on-off operation of a transistor T1 in connection with a control circuit IC1 is controlled in linkage with the on-off operation of a turn signal switch T/S-SW or a hazard switch HAZ-SW. This allows the turn signal switch T/S-SW and hazard switch HAZ-SR to make on and off of the power supply to the control circuit IC1, and it is practicable to nullify the dark current at the time out of service to zero mA.</p> |
