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  1. GreekPIC

    LED questions

    Sorry, I meant visible with night vision equipment, I want to use the IR LEDs. I like the 2+2 alternating LEDs design, I think this is what I'll do. Thanks, Nikolas
  2. GreekPIC

    LED questions

    Thanks Audioguru. Oops! I forgot to say I use a 9V battery. So for 4 leds (I want to place them at right angles so they're visible 360
  3. GreekPIC

    LED questions

    Ok, guys, I made the attached circuit and is working. I substituted the red LED with an IR one and it's still working. Should I change anything? Am I pushing the IR too much or on the contrary not getting all I can out of it? If I want to use 4 LEDs I guess I should change the 1K resistor...
  4. GreekPIC

    Which program saves *.pcb files?

    Trigger the header writes: PCB FILE 9 VERSION 2.70 I found the site where I downloaded it from and in other projects this guy says he used Protel. So I guess it might be the same. Is there any free demo of Protel? Thanks, Nikolas
  5. GreekPIC

    cnc machine

    http://www.electronics-lab.com/projects/pc/008/index.html
  6. GreekPIC

    3-Axis Stepper Controller

    What's the ratio? Maybe the program in which you make the *.hpgl is using the wrong units. Are you using inches or mm? Can you set a dafault in either program?
  7. GreekPIC

    3-Axis Stepper Controller

    I use TurboCNC and it doesn't support HPGL, only G-code. Have you checked your scale settings in Kcam? There's got to be a way to set that 1 step=...mm (or in).
  8. GreekPIC

    3-Axis Stepper Controller

    Trolex I've only made the board in Postcript format. I haven't milled any boards yet, I'm still tweaking the desing and handwriting G-code. I etched the board the old fashion way... Nikolas
  9. GreekPIC

    Which program saves *.pcb files?

    I have a zipped project (can't remember where I found it) with the boards in *.pcb format. Which program opens them? Any way I can import them into Eagle? Nikolas
  10. GreekPIC

    Fail in 100W amp. diagram!!!

    SmartKit usually includes deliberate errors in their schematics. If you buy the kit everything is ok. If you try to make it from the schematic, no joy... Do you mean this one: http://www.electronics-lab.com/forum/index.php?board=2;action=display;threadid=2488;start=1#msg15286
  11. GreekPIC

    3-Axis Stepper Controller

    What country? Do you have DigiKey?
  12. GreekPIC

    CCD chip

    Maybe a linear or angular position encoder. Print a binary patern and read the position with the CCD converting the binary value to decimal.
  13. GreekPIC

    3-Axis Stepper Controller

    RobiD, have you checked the board without the motors? Do the UCN outputs sequence when there is a step pulsetrain? Yes, it depends heavily on the software. TutboCNC works on DOS and a 486 will do. Mach 2 needs XP so the PC must comply...
  14. GreekPIC

    Optical guitar pickup

  15. GreekPIC

    3-Axis Stepper Controller

    Well, not much of a picture but it's quite simple
  16. GreekPIC

    3-Axis Stepper Controller

  17. GreekPIC

    Model Elevator Control Circuit - PLEASE HELP!

    Hmmm, I just saw my circuit doesn't have shortcircuit protection in case you press Up and Down at the same time. I'll work on it again later but it's a start
  18. GreekPIC

    Model Elevator Control Circuit - PLEASE HELP!

    Here's a simple elctromechanical solution. It would be better if Stop1 and Stop2 where two N.C. contacts on the same physical switch. The two microswitches can be connected in series with the two Stop swiches. Since (AFAIK) there aren't any three contact relays, you can use the extra contact to...
  19. GreekPIC

    3-Axis Stepper Controller

    I've made some changes in the board, you'll find them on page 12
  20. GreekPIC

    Model Elevator Control Circuit - PLEASE HELP!

    The stepper would also have holding torque but it is a bit more complicated to drive. Gear reduction would also help (it would multiply the effects of friction so that the motor wouldn't rotate with the power off). dandesign I'll draw a schematic later, I have to see the Champions League final...
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