Recent content by john2k

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  1. J

    Constant Current Driver

    They are never on at the same time, the second one powers up when the first one shuts down. But I put the diodes in there just incase something goes wrong. Depends how much they dim, i'll try and experiment and see how dim they get. If i had 2 sealed units with LEDs wired in parallel and then I...
  2. J

    Constant Current Driver

    Nope. The driver is housed inside a small plastic box and is a sealed potted box which has 4 wires coming out of it. When I test it with a 9V regulator, the regulator gets rather hot to touch and if i touch the plastic housing of the driver its also a little warm when I touch it. But as far as...
  3. J

    Constant Current Driver

    Yes that is what has happened, even after days of cooling down the LED's with one driver come out much dimmer than they used to and gradually dim over 30-60minutes period until its very dim to notice that the led's are actually on. The other driver on the other side is still working fine. Just...
  4. J

    Constant Current Driver

    Thanks Charlie, My driver has a 12Vdc input and if I use a regular 12V regulator the dropout voltage on those are usually 2V. I am told that for the 12V regulator to work it will need minimum 14V but in most cases a car voltage can vary betwen 13V - 14.4V. So during the times when the car is...
  5. J

    Constant Current Driver

    I have purchased a new driver that has a 370mA CC output, when I measure current draw from the output of the driver to the LED's it shows correctly at 0.37A. But if i measure the current draw from the battery to the input of the driver. the current draw reads around 0.21A. Is this strange or...
  6. J

    Constant Current Driver

    Quick Question: if my LED driver has a input rating that says input 12Vdc. And I used lets say a L7812CV on the input of the driver which has a typical voltage drop of 2v that means the input of the LED driver can drop lower than 11v. Does provide less voltage effect the driver? because although...
  7. J

    Constant Current Driver

    Forgot to mention Both drivers do not run at the same time but just incase they somehow did there is the diodes.
  8. J

    Constant Current Driver

    On my brothers setup, difference is i have the oem driver also plugged in with diodes to make current flow 1 way. so it basically looks a bit like this x2
  9. J

    Constant Current Driver

    Thermal shutdown is what i was suspecting but then after cooling down for a long period of time a thermal shutdown should reset but this doesnt. This starts off slightly dimmer than the other driver and then 30-60mins later goes very dim that it seems like it is turned off.
  10. J

    Constant Current Driver

    Thanks Will, I have another question. I've been using another branded driver for my brothers car for a few months which is very similar in specs. it's been working perfectly. One driver for each LED unit. But each LED driver has a 12v regulator circuit with some capactiors wired to the input...
  11. J

    Constant Current Driver

    Thanks for your reply Will. I have put quite a big heatsink on it and thats why i think the plastic enclosure is getting hot. Its not getting that hot. Just hot as if it was sitting in the sun for a while. Input voltage to the regulator is 13.8V output is 12V and current is 0.56A. So based on...
  12. J

    Constant Current Driver

    Will, I think i've got to the bottom of the problem. I built a 12V 1.5A low dropout regulator with a few capacitors and then connected that just after the fuse before the input of the 2 drivers and then from the regulator the 2 drivers are wired in parallel powering the two led units and it all...
  13. J

    Constant Current Driver

    I opened up one of the blown drivers and there is no regulator component on the circuit board itself, i'll take a picture later and post it. The driver doesnt have any regulator yet has a variety of input range (confused how that works). I thought maybe it is the fluctuating voltage issue so i...
  14. J

    Constant Current Driver

    after testing on my car i have realised that after the fuse blew the first time, the driver itself actually blew and thats why when i put a new higher rated fuse nothing happens. i tried with a new set of drivers wired in parallel with a fuse and it did the exact same thing the fuse blew because...
  15. J

    Constant Current Driver

    2A regular blade fuses blow. The fuses blow as soon as the side lights are turned on not with ignition. I replaced with a higher 5a one and instead of blowing the fuse, the driver lit the leds and then after a few seconds shutdown. I'm going to go to the car shortly and I'll measure the voltage...
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