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  1. D

    0-30V Stabilized Power Supply

    I finally made this PS and except for a few necessary values of element changes work fine. I think that I should change the transistor 2N3055 with other alternative transistor with same spacification because is very hot by increasing the current to 5A. I can also add the 4. 2N3055, i bought...
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    Current monitor/sensor

    Any idea??
  3. D

    Current monitor/sensor

    I made a battery analyzer, which can analyze the battery and discharge it. I can set up the discharge current with pwm controled voltage regulated through resistor. Voltage on resistor limitc the current, which flow from battery. I did the mistake and i put ZXCT at the end of circuit, because i...
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    Current monitor/sensor

    It is true but i have one resitor 0,47E before ZXCT current monitor, which is regulated by OPAMP pwm controled and limiting current is about 10Amps. Therefore can I use onther 10mE resistor as load and sensing the current on this resistor, so i don't need to change my circuit, just put in the...
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    Current monitor/sensor

    What will happen, if i put another 10mE resistor as load, as i wrote above?? Will this work or not, i think that it should be work??
  6. D

    Current monitor/sensor

    can anyone hlep me because im not really shure that i will solve this problem on that way
  7. D

    Current monitor/sensor

    What will happen, if i put another 10mE resistor as load, and than sensing the current. It will work or not? This may be the best solution for me, because otherwise i must change the way of current sensing
  8. D

    Current monitor/sensor

    Tnx, so can I replace the existing chip (current monitor) with other, which have a low side current sensing? Is there any ZXCT series alternative??
  9. D

    Current monitor/sensor

    I tried to sense current with this methode but i can't read any voltage on output pin, which connect to the ADC pin of microconroller... I don't know if problem has occured in circuit or anything else?
  10. D

    Current monitor/sensor

    Hi guys! I want to sensing the current in my circuit (SLA battery tester) with current monitor IC ZXCT1109 but i have one question/issue? Can i sense the current with Rload before the ZXCT or i need to use Rload as shown in datasheet? Below is picture to best undertending: In my case: attach
  11. D

    0-30V Stabilized Power Supply

    Can anyone help me about this??
  12. D

    0-30V Stabilized Power Supply

    yes, that is what i meaned, but how to connect the adjustable pin of fine pot, together with adjustable pin of 10k pot??
  13. D

    0-30V Stabilized Power Supply

    I have onother question, i don't know exactly where is the negative power supply in the schematic of stabilized power supply? Therefore which connection in circuit should i use to negative set voltage (oV to -30V)?
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    0-30V Stabilized Power Supply

    So i must insert 1k pot in series with existing trim pot and adjustale pin combine together??
  15. D

    0-30V Stabilized Power Supply

    So i have build the power supply and i replaced sense resitor to 0.27E and i used three paralleled 2n3055 transistor with 0.33E emitor resistor. I was thinking about max. current, how can i test this most easily?? Other component are unchanged against VER2 of circuit and REV3 of component!
  16. D

    0-30V Stabilized Power Supply

    As we know power dissipation of one of three 2N3055 output transistor is aprox. 65W and recommended thermal resistance for heatsink for one transistor is (200-35)/65 - (1.5 + 0.2) = 0,84 °C/W, but how can i calculate the required thermal resistance of heatsnik for three same transistor with the...
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    0-30V Stabilized Power Supply

    Where should i place the 1kohm pot3 for fine voltage regulation?
  18. D

    0-30V Stabilized Power Supply

    Tnx a lot!
  19. D

    0-30V Stabilized Power Supply

    What is wrong with my heatsink calculation in 5 post ago??
  20. D

    0-30V Stabilized Power Supply

    http://www.changpuak.ch/electronics/calc_23.php With this online claculator i have got the same results ??? ???
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