Circuit of using buzzer instead of figure light

Published:2011/4/13 22:02:00 Author:Nicole | Keyword: buzzer, figure light | From:SeekIC

If using a motor to watch indicator light, it will not decern easily weather the light is on or off in daytime, but the buzzer circuit can compensate for it. To turn on the ignition switch, the JFET 2N5434 also will be turned on after about 7s delayed time, so in the process of starting car and increasing oil pressure normally, the buzzer will not to ring; then using indicator light to watch oil pressure sensor and motor temperature sensor. This circuit can be fixed in those not being used buzzer plastic casing of bridge house.



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