Search results

  1. Kain

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

    Ante, I've been thinking about this but it's kind of pointless to put water cooling system considering that the air cooling h/s with large enough surface area would do it fine. I have built water cooling for my PC though, but the reason is overclock, noise and staility. It has been working for...
  2. Kain

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

    I have built dual output 3A PSU - the original chematic. When not used on extremas it's ok. Now that I'm trying to build the 5A PSU I need really large heatsinks since I want it to be as stable as possible. Now the trouble is that this kind of heatsinks aren't easy to find. I was planning to use...
  3. Kain

    Laser Applications???

    Yes they do use LASER for speed measuring. My friend found out in the hard way while crusing at 200+ mi/h ;D
  4. Kain

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

    It looks nice. Any idea where I can get it from and on what price? By the way is this 10W or 15W on the picture?
  5. Kain

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

    I was just making some libraries for the PCB of this project when I saw the "small" power rating of R7 - "only" 15W. Now, I was checking on different manufactors about this type of resistors since they are not something that I can get here in some local store. This is what I saw in mouser...
  6. Kain

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

    Yes, this is exactly what I ment. For a second I though that something is wrong with me too. I mean, I saw that somebody said that the emmiter of Q1 should be connected to ground and since it is already shown correctly on the schematic that you posted I wondered what the heck is wrong... ;D
  7. Kain

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

    Ok, I know this is not one of my smartest questions, but where the heck is the ground - 0V of this PSU? ;D
  8. Kain

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

    Thanks Ante. I was thinking to buy the chips but when I saw the price my mind was more like "HELL NO!!" However, when I saw the chip manufactor my mind changed to "wait a second.... " ;D I'm thinking to redo the PCB on Protel taking the rectifier and Q2 off the board. I am also planning to do...
  9. Kain

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

    I've been following this thread for quite a while since I built the original PSU 0-30V / 0-3A and still don't have any major problems. The reason I don't have problems though is due to the fact I never use it on its extremas. Now, I plan on modding it up to 5A with all the changes you guys...
  10. Kain

    Frequency generator to shut off street lights.

    Yes, you cannot exceed the power rating of the pointer, unless you change the swithing mode and so on, which means that the intensity of the source remains const.
  11. Kain

    Frequency generator to shut off street lights.

    Quantum, focusing the source does not increase its intensity at all on first place. It's the same to say that just that you put a lenses in front of your lamp it makes it more powerful (since power increases with the intensity doing the same). The intensity of your source will remain the same...
  12. Kain

    4 watt fm transmitter

    Well, according to the original source you are supposed to buy those since no information is given on how to make them or more specific data, such as inductance...so on. By the way, see this: http://www.rfparts.com/choke.html
  13. Kain

    Frequency generator to shut off street lights.

    Quantum, mCd stands for microcandela - unit for light intensity. I guess the "m" should look little different for micro, but we are limited by the software :). Cool about the pointer. It better work too ;D
  14. Kain

    Frequency generator to shut off street lights.

    Input voltage does not affect the wavelength of any monochromic light emitting devices. What it could possibly affect is the intensity, but nothing more. Some laser pointers are rated between 630~670nm meaning it COULD do the job for ya. If you can emmit a regular white light you will have...
  15. Kain

    Frequency generator to shut off street lights.

    Quantum, the other street light doesn't turn those off because the sensors have a limited scope of vision probably as I said before. They simply don't get exposed to any light from the other lamps (as we all know light follows only stright path). About the UV sensitivity, sensors are usually not...
  16. Kain

    0-30 Vdc Stabilized Power Supply

    Ante, I've been using this solution, but it works only if you can deassemble the used transformer ;D
  17. Kain

    Frequency generator to shut off street lights.

    The LASER light wave-length is more based on the chemical properties that on junctions. There might be UV LASERs, but keep in mind any LASER different than red color 630 -680nm up to 5mW is very expensive, meaning any other light different than red on LASER is expensive on first place. The other...
  18. Kain

    Frequency generator to shut off street lights.

    By double hetrojunction laser do you reffer to 2 semiconductor LASER in one body? I didn't say there are not UV lasers - there might be but this is not the point. You will need direct exposure to this light of yours to make the lights turn off. If the sensor is on the top of the lamp, it...
  19. Kain

    0-30 Vdc Stabilized Power Supply

    I had similar problem, but mine was with fluctuation of the panel all over. My solution was to power up the pannel on bipolar, i.e. +-5V with midpoint. I suppose your panels allow you to connect them this way, or hopefully they do. The good thing is that you only need few miliampers to power up...
  20. Kain

    Frequency generator to shut off street lights.

    Well, particle generator I can think of is only LASER. However, this sounds kind of pointless, right? I mean instead of dealing with laser you can basically turn some lamp on and it will do it ;D. It's true that laser light and regular light are waaay different. LASER is coherent, focused...
Top