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Problem with TCA 785 IC output

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I am trying to trigger a full bridge rectifier circuit with TCA 785 IC. On applying +12 volts on the IC, +3.75 volts is coming at 15th pin and +8.35 volts at 14th pin. The output is coming as pulse with an offset of 1 volt. The Input to the IC 785 is given from a 555 timer whose output is +5 volts. Please suggest me with necessary modifications in the TCA 785 circuit.

Sumanta
National Institute Of Technology Surathkal
Karnataka, India
 

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