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Recent content by Lampy

  1. Lampy

    Power connection question!

    Ah, great news! So i can consider Vo- to be gnd. Saves on buying a couple of psu's! Thanks for your response. Much apreciated. ;D
  2. Lampy

    Power connection question!

    Hi, i have some 5v digital led strip. It has three connections +5v, gnd and data. I have found lying around an AC-DC power module which seems like it may do the job of powering the strip. However the power module is designed to be soldered into a pcb and therefore has tiny little posts for...
  3. Lampy

    What is trim post for on power supply?

    Thanks! I get ya! So my strip is digital and has three connections. +5v, gnd and data. If i wanted to use one of these units to inject 5v+, could i just connect the single +5v from the unit and not use the -5v or trim? I currently have seperate signal cable to the strip which also carries gnd to...
  4. Lampy

    What is trim post for on power supply?

    Ah i see! So in the case of the enclosed unit i have which only has a post for soldering onto a motherboard out of it. If i opened up the case there would probably be an adjustment pot inside?
  5. Lampy

    What is trim post for on power supply?

    Hi, i found a couple of power supplies lying around that i would like to utilise to power some 5v led digital strip. They have 240v in from one side just live and neutral, no earth. And the other side has V+, V- and trim. Have attached link to the actual psu. What is trim...
  6. Lampy

    Cheap wire selection.

    Thanks for the input. Drawing now attached. My only real option other than super thick cable is more power supplies. But they are not cheap. :(
  7. Lampy

    Cheap wire selection.

    Hi, i have calculated that due to distances, voltage and voltage drop of something i am making i need some fairly hefty sized wire. 10/12 gauge infact. Sorry about my ignorance in electrical matters, but could i get away with using quality speaker cable for this? 200/300 strand type stuff. This...
  8. Lampy

    Help with voltage suggestions for new project!

    Hi, thanks for the help chaps, feel like i am getting close to understanding what's going on here. Looks like i selected the wrong strip for the purpose. I guess due to the distances i should have used 12v strip. Having spoken to the supplier in china i can confirm that the strip is 0.3w per...
  9. Lampy

    Help with voltage suggestions for new project!

    Hi, i am making 8 led light tubes. they consist of two led strips in each. Each strip has 79 leds which are 0.3w each.The strips take 5v. Thats about 88 amps by my calculations. From my drawing could anyone tell me the best solutions for power. As you can see i have decided to split them into...
  10. Lampy

    Which gauge wire should i be using?

    Wow! That is ridiculously big cable for the physical width of the led strip. Guess i need to re-think this setup. I've attached a drawing of what i'm trying to do. On some occasions i will be using just number 1,4,5 and eight therefore the cable distance between them will be longer. Any thoughts...
  11. Lampy

    Which gauge wire should i be using?

    Hi, i'm building eight led lights that i have calculated to be using 88.32 amps in total. They are 5v led strips. Each light might be as much 8 metres apart. So the question is - what gauge wire do i need to to carry the 5volts without voltage drop over them kind of distances. If it ends up...
  12. Lampy

    Which power supply do i need?

    Yeah, that all makes sense. Was trying to keep costs down by using items i could get easily. Seeing as i need 76.8 amps, i think i will split it into a psu for each side (4lights) 38.4 amps each. Seems like the only source for high amp 5v psu's is from china. This will be a bit costly due to...
  13. Lampy

    Which power supply do i need?

    Thanks very much for the reply. Would you say it's ok to use the 5v part of a atx psu or would it generally not give enough amps/watts? Cheers
  14. Lampy

    Which power supply do i need?

    Hi, i am making 8 led light tubes. they consist of two led strips in each. Each strip has 80 leds which are 0.3w each. The strips take 5v. My question is what are the specs needed from a psu to power all of the strips (16) with them running at full load? I want the full brightness possible. I...
  15. Lampy

    Custom project newbie help!

    Hi guy's thanks for the input, very much appreciated. That led strip looks ideal, though i think as i want to make eight of these tubes it might become quite expensive. I was thinking, i could just join a load of these together in a line -...
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