| 摘要 |
A flasher circuit for switching incandescent lamps with field effect transistor switches is described for use on a school bus. A current sensing resistor develops an actual load current signal and a current limiting circuit which generates a signal corresponding to a predetermined limit value of load current. A control circuit turns off the field effect transistor when the actual value of load current exceeds the predetermined value. A micro controller holds the reference voltage at a higher level during the inrush current interval and switches it to a lower level during the steady state current.
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