Published:2011/6/10 20:52:00 Author:qqtang | Keyword: multi-oscillator circuit, photoelectric couplers | From:SeekIC
In the figure is simplest multi-oscillator circuit of photoelectric couplers. When the power is on, as the voltages on the two terminals of capacitor C can mutate and the resistance of resistor R is higher than RL, so the power supply voltage is mainly imposed on R, and the LEV on F is low, the LED is blocked, as the charging voltage of the capacitor increases, the LEV of F is rising. when the LEV rises to a certain value, the LED is conducting and glowing, the light dependent pipe is conducting, the output voltage is jumping and close to the voltage of the power supply.
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