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  • Recent Forum Posts

    Ioannis

    Re: Current limit for HV Power Supply

    Will do that and report back.

    The final circuit will be pretty much as the above posted, though it needs a lot of refinement before it gets on a shiny pcb. Mainly for safety of the circuit and...

    Ioannis Today, 13:25 Go to last post
    pedja089

    Re: Current limit for HV Power Supply

    Can you try it without base connected? Measure voltages measured above?
    It will be grate to get some pictures, T2 part no, layout etc... If you don't want to share public, send me links to PM....

    pedja089 Today, 12:38 Go to last post
    tumbleweed

    Re: Pic18f25q10?

    I had a closer read of the datasheet for the Q10 and I think I found the real difference between it and the K series.

    There are no LF devices in the Q10 family. It seems to be rated for full...

    tumbleweed Today, 10:20 Go to last post
    Ioannis

    Re: Current limit for HV Power Supply

    Well, the NPN as you described, and having collector in lower dynamic than the base, makes sense why it does not work.

    But the PNP version does not. Double checked, changed transistors, still...

    Ioannis Today, 10:18 Go to last post
    pedja089

    Re: Current limit for HV Power Supply

    It was late when I replayed and didn't look in to schematic too much. And now it late again, so sorry in advanced if I miss something.
    You are right, for P channel configuration is correct. Your...

    pedja089 Today, 01:03 Go to last post
    Ioannis

    Re: Current limit for HV Power Supply

    It is set at 31,25KHz and it is filter out by 33K and 220nF.

    In general the supply works great, adjusts from 0 to max Vout, regulates better that my requirements.

    Just no protection so far.
    ...

    Ioannis Yesterday, 22:49 Go to last post
    amgen

    Re: Current limit for HV Power Supply

    just out of curiosity, what is the pwm freq. ?

    amgen Yesterday, 22:24 Go to last post
    Ioannis

    Re: Current limit for HV Power Supply

    Have not tested that idea. Will short the resistor, but I doubt this is the problem. OK, maybe when the circuit is first started, the output capacitor (10μF) may for a nanosecond overload the...

    Ioannis Yesterday, 22:07 Go to last post
    amgen

    Re: Current limit for HV Power Supply

    how about, the current limit is tripped when I=.4 amps...… instantaneous that is and that limit ckt would work for linear to hold to .4, but with pwm, the current levels can goes over that. Short...

    amgen Yesterday, 19:20 Go to last post
    astanapane

    Re: How do I discern Maidenhead Locator from GPS lat long info.

    the project will continue in here: http://www.picbasic.co.uk/forum/showthread.php?t=23951

    along with a bases of the needed understandings.

    astanapane Yesterday, 14:44 Go to last post

  • How To RSS Feed

    Microchip Tips and Tricks 

    by
    ScaleRobotics
    • View Profile
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    Published on - 17th June 2010 17:26  Number of Views: 6627 

    The link below has the most information about tips and tricks using PIC micro-controllers. The attachment is a smaller version ...
    Read More Read More

    Presetting Configuration Fuses (PIC Defines) into your Program 

    by
    Melanie
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    • View Articles
    Published on - 20th May 2010 16:27  Number of Views: 6275 

    1. What are the Configuration Fuses?
    2. How can I preset them in my Program?
    2.a. When using MeLabs default     ...
    Read More Read More

    Bits, Bytes Words and Arrays 

    by
    Melanie
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    Published on - 23rd April 2010 19:39  Number of Views: 2819 

    1. How can I reference a BIT in a BYTE?
    2. How can I reference a BIT in a WORD?
    3. How can I reference a BIT in a BYTE ARRAY?
    4. How can I reference a BIT in a WORD ARRAY?
    5. How can I reference a BYTE in a WORD ARRAY?
    ...
    Read More Read More

    I’m Running Out of CodeSpace, What Can I Do? 

    by
    Melanie
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    • View Articles
    Published on - 23rd April 2010 19:28  Number of Views: 5928 

    I’m Running Out of CodeSpace, What can I do?
    My progam is too slow - What can I do?

    Apart from the obvious and move to a faster PIC with more program memory, there’s a few little known tricks you can try.
    ...
    Read More Read More
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