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windoze killa

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Everything posted by windoze killa

  1. Are you using flux? What sort of solder are you using? Is the wire new or old? Does the wire have interleaved threads (Litz wire)? Try cleaning the wire with Isopropyl Alcohol and use plenty of flux (NOT BAKERS FLUID). Use resin core solder and not plumbers solder.
  2. I have been in electronics for 30 years but I have never hear of a GTO. What is one?
  3. You could use stepper motors which will have more than enough power to move you glass full of water. They can be controlled to such an extent that you wouldn't spill a drop. You could have it so when you press the button it would start of slowly and slowly accelerate and then slow down again as it approaches the end. Also very easy to make it revesible.
  4. Depending on you power supply and how you wire them PNP will be the wrong type. In a "normal" switch configuration the middle letter of PNP or NPN denotes the polarity of the required power supply. As such a PNP transistor will require a negative voltage on the bae WRT the emitter to switch the transistor on. If you can provide a circuit of how yopu intend to hook it up it would help.
  5. It is a resistor. High power wire wound type. The exposed windings are there for a contact ring. You move the ring along the length to tap off a particular voltage. The rings can be seen in the photos.
  6. I think the easiest method would be a switch on the O/P. just open cct the O/P
  7. Grab the datasheet for the chip. It should be easy enough to work out from there. For OE, SOC and EOC pins you should be able to use any of the control lines ie. busy line, for these outputs.
  8. You should be able to find relay parts in the Misc devices library. They have various footprints. You may have to modify them for you use.
  9. You could also try Powerbox, Amtex or Lambda power modules.
  10. The field strength meter should be about 1m away from the transmitter antenna. You should not be getting V/m, it should be more like mV/m.
  11. As far as which pins on the parallel port goes it will depend on your software that is going to read the port.
  12. Well this design is very simple and its not really the design that I have developed just its implementation. It is call a Speedometer. You look at it and....... Scroll down.... Keep scrolling.... A but more...... DON'T SPEED
  13. To be honest we haven't noticed it or paid much attention to it. Being in R&D we tend to work on the premis that if it works, leave it alone or if it aint broke, don't fix it. We came up with the design and it seems to work well. When we have trouble we will investigate more
  14. I have developed the perfect device to avoid being done by Radar guns. An amazing side shoot is that this also works on the old amphometer tapes on the road. Anyone interested just respond here.
  15. The tank is underground. Bit hard to see a tube. You could try using something similar to a fuel tank gauge but on a larger scale.
  16. We current use ULN2003 chips for a very similar application and they work very well.
  17. You could use something like a UNL2003 darligton driver chip. It has 7 outputs. Would give you more combinations than you could ever need.
  18. Pretty close to what I described. Does it work?
  19. If this is a standard FM band transmitter then I would say they are air wound. I would wind about 10 turns of 22AWG enameled copper wire on a 4 to 5 mm former. Then remove the former. It is about the size of the coils in the transmitter I have.
  20. Thats not quite correct. Unless otherwise specified all power measurements (RMS or Peak) are referenced to a sinusoidal waveform. PMPO is about the only power measurement that doesn't. It is what you find on PC speaker systems. Little tiny speakers that cost $30 and can handle 600W PMPO. I am beginning to believe PMPO is latin for "Peak power just prior to putting speaker coil into the wall".
  21. As far as I know all memory sticks have a micro on them to control the read write of the memory. It also has ID info to tell the PC what it is. So I guess the answer would be yes, if you know how to write the code and interface it.
  22. ADC chips like that can be interfaced directly to the port. You may need a buffer chip for some of them. You should then be able to read the data from the port with some software.
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