Search results

  1. ante1

    counting device

    Is this the same persons leaving the room as in the “Light management system” thread?
  2. ante1

    Exaust Fans for Entertainment Center

    OK, you could use AC-fans and a simple triac control for the regulation.
  3. ante1

    motor driver L298 help

    Oh my, some days I wish I didn’t go here at all! I believe it’s time for…….now where did I put that bag…..  Oh here it is, knock yourself out!
  4. ante1

    What is holding switch mode PSUs back?

    Hi Zeppelin, Not critical, just any DC works since it’s shopped up anyway at a high frequency.
  5. ante1

    Exaust Fans for Entertainment Center

    Hi ferris, Welcome to our forum. Are you sure you want to control the fans yourself? Why not just let them run at a slow speed (silent) as soon as you use the equipment?
  6. ante1

    Need help identifying part

    Hi boschman, Welcome to out forum. This is most likely a capacitor 100nF (0.1uF) and it has nothing to do with horseracing! ;)
  7. ante1

    motor driver L298 help

    Thanks AG, I’ll brows through it! Just a short comment at this stage; This is a local UK manufacturer unknown to me. I am familiar with some of the stuff manufactured by for ex. Zapi, Sevcon, General Electric, Cable Form, Curtis, Linde and Sigma to name a few. I did not expect to find any deep...
  8. ante1

    motor driver L298 help

    Hi AG, I couldn’t care less about the way a golf carts drive system is constructed! I know from experience how torque changes and how it’s possible to optimize it by changing the frequency of the PWM. There are even times when there is a substantial gain in changing the frequency within a...
  9. ante1

    trasformerless powersupply

    I agree; using this kind of non galvanic isolated device is suicidal!  :o
  10. ante1

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

    Hi AG, If you like to improve the stability of the zener D8 it is possible to add a standard rectifier diode (i.e. 1N400X) in series (head on).
  11. ante1

    Ball Rotor/laser pointer project

    I don’t know where you live but this came up (and many more) on “prism+laser” in Google!: http://www.escoproducts.com/html/prisms.html
  12. ante1

    PC LCR meter software!!!!!!!!!!! GREAT SOFTWARE!

    Thanks Tkjas! Have you tried it? Is it stable enough to get a reasonably good measurement?
  13. ante1

    Ball Rotor/laser pointer project

    Hi thoffen, Welcome to our forum. You could fit a prism to the shaft of a stepper motor and aim the laser at it. This stepper could then be fixated to another steppers shaft and you got X, Y and Z. Poor cat!  ;D
  14. ante1

    64 Inputs Outputs from PC parallel port

    If that did not help; this might: http://www.electronics-lab.com/forum/index.php?topic=5379.126 ;D
  15. ante1

    64 Inputs Outputs from PC parallel port

    This might give you a clue:
  16. ante1

    motor driver L298 help

    Hi AG, That’s correct but; the torque does change long before this point (and thus the rpm under load) due to the inductance of the motor winding. When constructing a PWM controller for a motor there is some consideration regarding the frequency vs the inductance. This means that you need to...
  17. ante1

    What is holding switch mode PSUs back?

    I don’t really see a computer PSU as a DC-DC converter, more like an AC- DC converter or primary switched DC-supply. I believed computers where more sensitive than they obviously are since they seem to accept dirty (cheap) DC. I have seen many HiFi stereo amplifiers with only a pair of...
  18. ante1

    Comment about this design...

    Yes with the LM350
  19. ante1

    Power dissipation limiter

    Do you think so; well it’s a complete PSU not just the pre-regulator! It isn’t a paper towel, it was my scanner set on color on a gray scale pic! ;D
  20. ante1

    Power dissipation limiter

    I found it, this one worked very nicely:
Top