Help needed to complete an another inverter....

Discussion in 'The Projects Forum' started by APDEV, May 31, 2014.

  1. APDEV

    Thread Starter New Member

    May 30, 2014
    20
    0
    Hai,
    Currently I am also doing another inverter project ( obtained from homemadecircuitsandschematics.blogspot.in ), which is a pure sinewave inverter..
    The circuit is based on the decade counter IC 4017. In this circuit, i am getting an average voltage signal of about 3.0 V only at pin#2 and pin #3 of IC4017... In the circuit i posted before, using 4047, the average voltage found at the output pins of 4047 IC was 6.0 V average ( 12 Vpp equal to supply voltage ). But here it is only about 3.0 V.

    Mr. Swagatham Majundhar , who owes the blog ( homemadecircuits... ) told me that the voltage available at pin#2 and pin#7 will be exactly the same as the supply voltage ( 6.0 V average )... But mine is different... What is the reason for this ? Do anybody give me a better reply and suggestion for this ?
     
    Last edited: May 31, 2014
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,656
    632
    The counter is set up to reset immediately after output "4" (the fifth state) goes high, so you get an approximately 25% duty cycle. 12 volts x 25% = 3 volts average. Your measurement is correct and for what its worth, it seems that the counter is counting correctly.
     
  3. APDEV

    Thread Starter New Member

    May 30, 2014
    20
    0
    Thanks bro.
    But what i have to do to make that voltage about 6V, because that much average voltage is needed to make the MOSFETs conduct fully, and thereby producing maximum output power by the inverter...
    Can i make any other reset positions ( other than pin#10 ) to make it 6.0 V ?
     
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