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Recent content by wondrous

  1. W

    Why do they put solder on some tracks in power mains supplies?

    Hi Dont say it's stupid question we all learn 🤗 For sure it about current handeling capacity Lock at it All the add solder is at power track.
  2. W

    IC TDA2004R Electrical specifications

    thanks i will consider that in my next planning
  3. W

    IC TDA2004R Electrical specifications

    mr Brian thanks for your advice sorry please can you help me to understand more about (THD: Total harmonic distortion) What i can expect from THD figure in the data sheet - - - Updated - - - that's a good advice ok i will try to do it i care about (bass)is the chose of speaker for BASS...
  4. W

    IC TDA2004R Electrical specifications

    thanks very much mr audioguru the supply 19.5v @3.4a is lap top charger can i but lm7805 to decrease 19.5v or use LDO REGULATOR and for current may i attach a pnp transistor as high current pass ............. also i can get pc power supply witch have high current capability but I'm guessing it...
  5. W

    IC TDA2004R Electrical specifications

    HI I have audio ic ( tda2004R ) and wont to supply it i have 12v @2a and 19.5v@3.4a i need the max output from the ic but the table of Absolute maximum ratings in page 6 _ the first table Output peak current 3.5 a and for voltage it give three figure what is the different between...
  6. W

    Easiest way to get 5v and ~1V

    brother that capacitors add to pass noise so in general everywhere you need a clean dc use capacitor to have clean rail
  7. W

    Easiest way to get 5v and ~1V

    no capacitors block dc put it like this as close as possible to supply pin
  8. W

    Ac induction motor constant speed control

    HI I read at past you can attach a little dc motor to the rotor and the voltage that generate by it , feed to op amp as a comparator and do triac phase control to have nearly constant speed
  9. W

    Simple transformerless power supply design

    yes there are like lm2576-12 and xl6009 very nice ic have fun dear mdaupu
  10. W

    explaining about RMS

    thanks akanimo your above post understood well by reading last post
  11. W

    explaining about RMS

    then it's all about measurement and calculation the signal not only take a value and multiplied with some figure thanks sir klaus
  12. W

    explaining about RMS

    many thanks sir that's helpful may i ask _ excuse my multiple question _ what is the meaning of true RMS I see that term in many Measurement topic ?
  13. W

    explaining about RMS

    HI @ c_mitra I see now there are more and more to learn and I appreciate every post
  14. W

    explaining about RMS

    HI i have a question about rms rms = 0.7 vp where (0.7) come from is it depend on frequencies 50/60 hz ? like PWM when we vary duty cycle we obtain different value of volts but here we vary frequencies thanks
  15. W

    Three phase delta load problem

    Thanks mr BradtheRad sorry for let you search to me i will do my effort thanks again
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