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  1. guod

    DiY LEDs - How to Power Them

    most electrical engineers laughing about this circuit. voltage drop over the resitors 1.4A x 1Ohm = 1.4V voltage over the diodes now 34.6V and at this voltage there is no current flow of 1.4A conclusion : we need higher source voltage what a stupid wizard
  2. guod

    First kid on the block...

    i can help it´s simple...
  3. guod

    Why do some guys wats to still use mono led with cobs?

    the ISS Solar Arrays ".... Altogether, the four sets of arrays can generate 84 to 120 kilowatts of electricity -- enough to provide power to more than 40 homes. " https://www.nasa.gov/mission_pages/station/structure/elements/solar_arrays.html#.V0g78vmLTRa
  4. guod

    Is this a Vero 29 killer?

    yes, and all nr.
  5. guod

    CXB3590 36v and 72v

    simple and short weighted by spectrum lumens/watt = Luminous efficacy µmol/watt = Quantum efficacy output watt / input watt (no spectrum involved) radiant flux / watt = energy conversion
  6. guod

    CXB3590 36v and 72v

    lm/watt is it little moles per watt or left moles per watt or maybe lousy moles per watt?
  7. guod

    ARCTIC ALPINE F12

    Nope Green (sense)
  8. guod

    ARCTIC ALPINE F12

    yellow (+) black (-) blue (control)
  9. guod

    DIY Passive cooling with PIN Heatsinks SST120 and SST140

    we have here two independent systems. one system(your nation wide grid) is grounded at the powerplant and at home. the GFCI can only work in this configuration. the other system(the driver output) is not grounded. here you can touch one of the wires and you will feel nothing as this system is...
  10. guod

    Sucking or Blowing?

    http://sound.westhost.com/heatsinks.htm#s18 18 - Fan Cooling ... .. "At first glance, you might think that it doesn't matter much whether the fan sucks or blows air into the tunnel. In reality. there is usually a big difference, with blowing (as shown) giving much better cooling. The reason is...
  11. guod

    Cheap and Cheerful DIY using Citizen cobs

    that SPD is generated by two different phosphors...High CRI, the NICHIA Way and here we have deep red generated by Quantum Dots...
  12. guod

    Can a subforum change the WORLD?

    You mean SDS aka Stardustsailor Supraspl cant write greek me think...
  13. guod

    Arctic MX-2 (and other pastes)

    or this will happend....
  14. guod

    Arctic MX-2 (and other pastes)

    KRYONAUT Thermal Conductivity 12,5 W/mk Thermal Resistance 0,0032 K/W Electrical Conductivity* 0 pS/m Viscosity 130-170 Pas Specific Weight 3,7g/cm3 Temperature -200 °C / +350 °C Capacity 1,5ml / 5,55 g 3ml / 11,1g http://stage.thermal-grizzly.com/en/...
  15. guod

    Can a subforum change the WORLD?

    use a wiki not a sticky
  16. guod

    need help wiring driver to extension cord

    depends on your country google "iec wire color code" standart is brown - life blue - neutral green - earth/ground
  17. guod

    Lets talk about "Other" COBS !

    http://www.getiangroup.com/products.aspx?TypeId=50035&FId=t3:50035:3
  18. guod

    The far red thread

    lowest by osram .... all TRUMPED or what....
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