Recent content by Kain

  1. Kain

    SERVO THROTTLE SIGNAL

    I figured it out. The trottle signal is only for speed control purposes. The motors normally spins in one direction only. Thus, if we want it working in reverse direction, the motor control has to be programmed with the corresponding instruction. Either way - it cannot be done on the fly with...
  2. Kain

    Driving IGBTs

    I want to build an H-Bridge with IGBTs since I got quite some here and I'll be switching about 15A. Now, the low side of the H-Bridge is easy to drive since potential that appears on the gate is basically the same as Vge assuming that I connected E directly to GND. However the high side is a...
  3. Kain

    SERVO THROTTLE SIGNAL

    Um, reverse the connections? We are talking about brushless motor not brushed... I don't think this will have any effect on the direction of rotation. Maybe it's a software adjustment or something...
  4. Kain

    SERVO THROTTLE SIGNAL

    Nice, but then how does one reverse direction?
  5. Kain

    SERVO THROTTLE SIGNAL

    Wow, it's been a while since I visited the forum  ;D, but anyways. I got my hands on a brushless DC motor as well as the controller for it and I wanted to use it for a non-RC model applications, so obviously in order to drive it I will need to emulate the same signal as the one a receiver is...
  6. Kain

    Convert 0-30V 3A PSU to 5A or more

    Somebody here asked about the parts that I used to build the PSU. I'm sorry that I respond quite late but I've been really busy lately with FPGAs... About the parts - Audioguru is right. I used the modified list for 5A. The power resistor is actually 15W and it's mounted on the PSU case. Smaller...
  7. Kain

    USB to LPT Adaptors

    Hi Zombie! I hope you don't mind pasting the URL  ;D
  8. Kain

    USB to LPT Adaptors

    Ok, it seems nobody knows anything about it at this point. I checked things myself and it comes down to the point that USB to LPT can be used only for specific purpose of printing and it is not guaranteed to work with all printers either. In other words if one needs to expand a newer PC with LPT...
  9. Kain

    IGBT and MOSFET drivers???

    Ok, so what you meant is that the driver chip is switching on and off the IGBT/MOSFET more efficiently as well as providing for "dead time" when reversing directions. Would you recommend any IC in your experience? Thanks again  ;D
  10. Kain

    IGBT and MOSFET drivers???

    Thanks Audioguru! Can you schematically show what you mean by saying that one MOSFET is connected to the other? I thought that they need to be both "on" if they are to conduct the current through the motor
  11. Kain

    IGBT and MOSFET drivers???

    Hi again everybody
  12. Kain

    USB to LPT Adaptors

    I just received my FPGA board from Digilent and besides the fact that it looks nice I noticed something that I don't like at all - it came with LPT programming cable. Well LPT is a dying standard as we can all see - new PCs or laptops don't even have one anymore and this is my case, as well. The...
  13. Kain

    EPROMs and "Don't Cares"

    Ok that sounds bad now. So virtually I have to describe all situations where don't cares will normally simplify the situation... That just made my code close to 4000 lines...  :'(
  14. Kain

    EPROMs and "Don't Cares"

    I am really curious if EPROMs or EEPROMs allow for "don't care" conditions. Any ideas?
  15. Kain

    Convert 0-30V 3A PSU to 5A or more

    Thanks MP
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