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  1. Um...Me123

    Brightest LEDs on the planet?

    I'm new to SMPs but see that is definitely my way to go.  For benefit of learning, what would be wrong with just PWMing a mosfet and putting a cap across the output?  I can see that there could be fluctuations in output when the input changes but besides that is there any reason one couldn't do...
  2. Um...Me123

    Brightest LEDs on the planet?

    I know this is getting a little off topic but while I have you all here... An led I'm considering is the Luminus Devices CST-90.  It seems to be the best balance between $s and lumens.  $45@2700lm with a perk of having a thermistor. Question:  It runs at 3.2-3.7V @ 1-13A With a car as the...
  3. Um...Me123

    Brightest LEDs on the planet?

    My HIDs are 8000k.  So the idea was that if I decided on not doing the RGBs for financial and flux reasons then I want something to match.  Do color temps differ between types of light sources?--> would 8000k on a LED be more blue than a 8000k xeon arc?  My HIDs are blue-white...mostly white. 
  4. Um...Me123

    Brightest LEDs on the planet?

    Does anyone know of white leds at 8000k or are they all <6500k?
  5. Um...Me123

    Brightest LEDs on the planet?

    Some very good things to think about on the last posts.  Thanks   My reasoning for the peltier is because I don't think a fan would be reliable enough because of dust/rain and I know peltier use a ton of power but I don't see too much of a problem there as long as the car is running, right...
  6. Um...Me123

    Brightest LEDs on the planet?

    I did notice that Phlatlight had a RGBW (perfect for my app) that is brighter than the 40W but its $200.  yaouch My idea is to use these on my car as fog lights.  Already have regular halogen ones so it would replace the bulb only, using the stock reflector.  I would be able to precisely color...
  7. Um...Me123

    Brightest LEDs on the planet?

    What has everyone found for the brightest LEDs out there? For white I know PhlatLight has one pushing 6000lm and LedEngin will have a 40 watt RGB approaching 2000lm.  Anyone know of brighter ones?
  8. Um...Me123

    Car battery to parallel port

    Im really dumb and all so maybe I can provided some simpler input that's more than likely useless.  The experienced guys confuse me a lot.  Use a LED maybe?  If it needs to be hooked to a comp then use a relay and have a high pin connect to a low pin through the switch.  What ever your interface...
  9. Um...Me123

    RF transmitter/receiver system

    I used an old RC car circuits to control 4 relays so your beyond me.  It was a forward-backward type car that switched the polarity for two motors with two mom. center off switches.  Use some diodes to split those 4 wires to 8 and you got yourself 4 relays.  I know this was no help but I feel...
  10. Um...Me123

    robot

    wired or wireless?
  11. Um...Me123

    New Project/Questions

    I don't understand what your doing but of course they make 110VAC relays (coil side) so 24VAC is no prob for the switching. just an example: (you probably dont need DPDT) http://www.allelectronics.com/cgi-bin/item/RLY-2120/500/120_VAC_DPDT_10_AMP_RELAY_.html
  12. Um...Me123

    FAULTY AUDIO CABLE TESTER

    Any ideas on what methods to use to check various lengths (max of at least 100') of audio cable for things that may cause line noise or cutting in and out?  I have some ideas but need help. What specifically causes line noise? Another question I have that may play a part in this is how do...
  13. Um...Me123

    infrared help

    I went back to re-challenge these IR deals with a project that would make lights go on when you enter a room and off when you exit.  The IR leds can communicate now but for only about 4-5 inches at a 1ms on / 5ms off pulse.  (in low light conditions)  I'm just learning but I want to know how to...
  14. Um...Me123

    infrared help

    I bought some infrared leds and phototransistors on ebay.  Hooked them up to a microcontroller board and  put them right face to face and no sound.  I looked with a video camera and the infrared was blinking.  Tried with a sterio remote and it did beep.  I know the emmiter can do 940nm and I...
  15. Um...Me123

    HP Scanner! ~5370C~ Click if you have one.

    Our HP 5370C scanner just died.
  16. Um...Me123

    LCD Panel Meter Making Me Very Mad!

    it says SUPPLY VOLTAGE: 9V (8-12V)DC
  17. Um...Me123

    LCD Panel Meter Making Me Very Mad!

    OK So I bought this LCD panel meter to measure VDC (20Max) and I hooked a 9V battery to the power leads and it said 0.00.  Great so I hook it up again 5 minutes later it didn't work and has never worked again.  Bought another one finally several months later (has to be ordered) and I just hooked...
  18. Um...Me123

    Couple AC questions

    Did I ask really dumb questions? Trying again....
  19. Um...Me123

    Couple AC questions

    Will having a EMI filter (IEC connection (120VAC)) help when used with a radio controlled circuit? ((The RC circuit activates relays with which the 120VAC travels.)) Can blade fuses be used on an AC current on only one wire?
  20. Um...Me123

    Car Alarm

    Just Installed a car alarm for my friend and saw that the basic way in which is works is very simple.  I want to build a simple system for my own car, which happens to be wayyyyyyy more prone to a break in than his anyway, using some shock sensors and possibly door detection (using dome light...
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