Thursday, May 10, 2018

  power  problem    power concept
 pwm  power  dependent  on pulse  width   modulation this done  by  2 transistor  and   component in the  circuit  rc   circuit  and photo  coupler depend  on the  output  power   on 110 divided  on 2 resistance  r1 r2  and connected  to  kia123 ic which   has rule  v out   2.5v = vin  r1/r1+r2
you  can down load   datasheet  of   it
 so  vout  110  is  the  make the  control  on  the pwm  by  increase    v  biasing   on the   transistor    or  decrease  the  volt  on base   of  drive transistor  which  connected  by  collector to main   transistor  by resistance

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