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  1. D

    Current monitor/sensor

    what is your suggestion?
  2. D

    Current monitor/sensor

    Instead of power supply we use battery for supply circuit and it stars discharged over load resistor and npn transistor. Because of adjustable pwm voltage we regulate fixed discharged current, I think that this circuit is ok with npn follower circuit and transistors mentioned above.
  3. D

    Current monitor/sensor

    yes, I want use in both direction, one circuit is provide battery discharge for analyze it, other is for charge bit only optionally, the main purpose is only discharger, since is not big difference between circuit.
  4. D

    Current monitor/sensor

    If i use just one power transistor for max. 10A discharched current i should use emmiter resistor also for voltage drop on it, i think that 0.22 or 0.33E is ok. What about noise from negative feedback of OP, i think that its better to use capacitor between negative pole of OP and ground?
  5. D

    Current monitor/sensor

    OP is LM324, i think that it should be ok
  6. D

    Current monitor/sensor

    TNX for suggestions, i use 24V Vcc supply voltage in my current version so i must calculate R2 for proper voltage drop on it, i think so. Should i use MJ15003 NPN output power transistors in combination with some kind of BD139 transistor? MJ15003 transistor has a small thermal resistance factor...
  7. D

    Current monitor/sensor

    Is this ok?
  8. D

    Current monitor/sensor

    So, which circuit you finnaly suggest for me with two power transistor if it's need?
  9. D

    Current monitor/sensor

    Is this OK if we look back to my first version of circuit? This is what I was thinking about and I think this is the most easy for correction my current version of circuit, I just want to add another transistor on my heat sink to decrease temperature on it.
  10. D

    Current monitor/sensor

    thanks for your help! i will thinking about my circuit and which material i have available for this project and maybe i should corrent my current circuit i have onother PNP transistor and how should i connect each other in parallel to decrease dissipation of single transistor and therefore...
  11. D

    Current monitor/sensor

    Should i place shottky diode between transistor collector and load resistor for protection? Voltage from OP folower feedback can occur also on transistor collector or no?
  12. D

    Current monitor/sensor

    Sorry I took a picture quickly with phone and bad light i just want to show example where to put ZXCT because i did not get a reliable resault before at output pin of ZXCT. I didn't draw a power supply but i have it off course, it is 24V and i took LM324 which have common-mode voltage range. I...
  13. D

    Current monitor/sensor

    Hi...a long time ago i asked a question about ZXCT placement in circuit and i started a project again and i will continue where i stayed, so i have one question. In circuit below, which represent microcontroler (PWM) regulated discharge current/power with OP folower as we can see, where where...
  14. D

    0-30V Stabilized Power Supply

    I finished with working on power supply and made a test yesterday but just one think is not working properly, i can adjust the current only up to 3A then current blocking turning on. I use elements for 5A project (Redwire) as i mentoined couple of times above but i have not idea where is the...
  15. D

    0-30V Stabilized Power Supply

    A have been working on this a log time ago and i have just one question for you, which element in circuit is total allowed output current adepend on?? And just one thing, is project according to your parts list work properly at all or you did some changes on project, i am talking about 5A...
  16. D

    Current monitor/sensor

    Any idea?
  17. D

    Current monitor/sensor

    OK, I fixed the problem and i put the ZXCT1109 as shown in datasheet but i still have one problem. If i want to get 0-5V output voltage and 0-10A sensing current i must put the Rsense of volue 10mE and Rgain 12,5kE, i get equations in datasheet. But now i testnig the proper function of this...
  18. D

    0-30V Stabilized Power Supply

    You mean "none" about changing elements in circuit or you said that i can't use the three MJ series and decrease temperature on heatsink and transistor case due the better thermal resistance (0.7)?
  19. D

    0-30V Stabilized Power Supply

    Therefore i can use three transistor any of MJ series on my heatsink but which element in circuit must be changed before running the PSU??
  20. D

    0-30V Stabilized Power Supply

    Yes, i made PSU with new part list for 5A (redwire) and use new circuit with three 2N3055 transistor, but i thinking about replacing this transistor with better one, maybe with MJ15003, which have better thermal resistance (0.7°C/W) therefore dont,t need cooler to decreasing the temperature on...
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