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  1. TheChad

    Koford (Slot Car) Bench Power Supply Project

    With that DC/DC module, it's not any harder, in fact its probably easier! -TheChad
  2. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, I ordered the 100Ω 5watt resistor, but while I'm waiting for it to come, I thought i would so some testing.... I ran one of my fast motors, it pulled ~4amps @3v.. I ran it for about 10 minutes, the power supply was room temp! Nothing even warm! -TheChad
  3. TheChad

    Koford (Slot Car) Bench Power Supply Project

    http://www.mouser.com/ProductDetail/Ohmite/WHE100FET/?qs=sGAEpiMZZMtbXrIkmrvidCzA%2fKXd8dIybAo0bkBKWM8%3d This is what I am looking at ordering, is that what you recommend? -TheChad
  4. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Does the type of resistor matter? In regards to make up? Carbon film, metal oxide, wire wound? Etc? -TheChad
  5. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, so the capacitor charged (power on) no load measures ~19.6v +/- 0.2v... The capacitor with the 1 watt 100-ohm resistor installed, measures ~19, +/- 0.12v.. So, the wattage I got is still right? 3.61 watts? So a 5w resistor would be the proper size? Thanks! -TheChad
  6. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, I ran by Radio Shack today and picked up a 100ohm 1-watt resistor, with the resistor installed, I get ~19.00v (+/- 0.12v) output from the capacitor. The capacitor bleeds off in ~3 seconds, which is perfectly acceptable. So my only consideration left is: 1. What wattage should I order...
  7. TheChad

    Koford (Slot Car) Bench Power Supply Project

    As we know at this point, I have much more power in this supply than I need or use.. I only need 12v and will never use more than 6a (Which I probably will never even use that much)... So it sounds like the correct size resistor on the Capacitor is the best solution (no?).. I would get...
  8. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, let's side track on the relay thing for a minute... I connected the old 1k rheostat between the terminals of the capacitor, and turned the rheostat up to the 1k setting... It drained the capacitor in about 20 seconds (I didn't actually time this one, just a guess). It was much...
  9. TheChad

    Koford (Slot Car) Bench Power Supply Project

    1. 12.6v (rated), but measures 14.8 (no load) 2. 8A 3. Radio Shack (only local supplier) or Mouser Is there such a thing as an electronic relay that doesn't have the *click* of the magnetic relay and maybe smaller? Thanks! -TheChad
  10. TheChad

    Koford (Slot Car) Bench Power Supply Project

    10-4, so I would connect the relay to the output of the transformer before going into the rectifier. Got it. Soo the AC feed with act as the switching feed only and the meter would be connected between the terminals that open/close with the voltage from the AC? So can you guys suggest a...
  11. TheChad

    Koford (Slot Car) Bench Power Supply Project

    I don't quite understand what you are saying? Operated by the center lead on the transformer? That lead was cut off flush as I never used it..... If that's what you are talking about? I assume you meant a relay with an AC coil? -TheChad
  12. TheChad

    Koford (Slot Car) Bench Power Supply Project

    So what relay would you guys suggest? Relay's have to be activated by something right? How would I activate the relay? -TheChad
  13. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Fair enough.... The best option would be a switch potentiometer with 2 separate switches... But I haven't found one of those.... My current Switch potentiometer, the switch is connected between the + out from the DC/DC Converter and the + in on the volt meter / the + test lead, so when the...
  14. TheChad

    Koford (Slot Car) Bench Power Supply Project

    I thought about a relay, but I don't think I have room for a relay.... I pretty much used up all available space... I have been looking/reading looking for any type of electronic relay/switch, but not finding much solutions... -TheChad
  15. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Well, that and the meter is DC and the main's are AC.... I was reading about the DPST and it says they are isolated from each other... so even if there was a short inside the switch, the 2 circuits shouldn't short to each other? -TheChad
  16. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Just a thought.... I wonder if there is such a thing as a rocker switch that has 2 separate circuits? Currently the main power rocker switch just breaks the A/C feed from the wall.. If there is such a rocker switch that has 2 separate circuits, I could break the connection between the...
  17. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Here's a link to the eBay auction of the meter I bought: http://www.ebay.com/itm/261591441659?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT It has pictures of the meter and connections... As you can see, there is a wire harness with 3 wires, Red/Black/Blue. Those are the load wires...
  18. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, Here are some pictures of the (almost) complete project! The only thing I have left to do, is to figure out what to do with the power to the volt/amp meter.. Otherwise, everything else is done! Thank you EVERYONE for all the help! You all have been such a great help to me! This...
  19. TheChad

    Koford (Slot Car) Bench Power Supply Project

    The meter has 5 wires, Power-IN (+/-), and the 3 lead wires for the volt (+/-) / amp (load) meter.. In other words, I believe they are completely separate circuits.... That said, and the wide range of the input power, I don't *THINK* the input power or any variation in it, would have any...
  20. TheChad

    Koford (Slot Car) Bench Power Supply Project

    Okay, Adhesive problem solved.. http://www.eclecticproducts.com/_tds/e6000_tds.pdf It only has a 150-Degree Service temperature. I was hoping for something in the 400-Degree range, The KDPC 2502 Bridge Rectifier (http://www.digchip.com/datasheets/parts/datasheet/129/KBPC2502-pdf.php) has a...
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