Search results

  1. Um...Me123

    BENCH POWER SUPPLY

    OK!  I'll take your word for it even though I'm still not sure what you mean by mains and secondary.  It said the neon works fine with 120V by the way. Looking back at the schematic is it ok if I run the other DC things off the approx. 24VDC the transformer and bridge put out?  What I mean is...
  2. Um...Me123

    BENCH POWER SUPPLY

    Back to my relay question...I think I might have figured it out.
  3. Um...Me123

    BENCH POWER SUPPLY

    [glow=blue,1,900]I think we should just re-name this Um...Me123's questions thread ::) Ok I have dilema. My circuit consists of: 2AA supply (3V) two 3.2+V 30mA white LEDs--wired in parallel two 1.7V 20mA red LEDs---wired in series With being wired the way they are there is no need for a...
  4. Um...Me123

    BENCH POWER SUPPLY

    Hey guys got a couple things for the supply(and general use) from radio shack the other day and the online parts should be here any time now. I have a quick question about something not related to power supply but I didn't want to create a whole new thread. I had a RC car from my child hood...
  5. Um...Me123

    BENCH POWER SUPPLY

    Thanks for you help guys!  I've just ordered around $40 in parts so I won't have any questions for a while.
  6. Um...Me123

    BENCH POWER SUPPLY

    Well I was hoping for at least 1A (for the project in general) but with the wall trans. will I not be able to even get the full 1A out? Would the best idea would be to just scratch that idea and go back to the 25V 2A CT? (<thats what you call them?) The box I'm making this in is 8"x6"x3" so...
  7. Um...Me123

    BENCH POWER SUPPLY

    About that LCD...sorry for being persistant ::) Why would it jump around?  What is it made for if it jumps all over on a DC?  One person who rated it said he use it on a battery and it just jumped in the tenths (in other words what is the difference between the supply and a battery as long as...
  8. Um...Me123

    BENCH POWER SUPPLY

    ???HUH? ??? How does that answer any of my questions?  Are you saying the LM317T won't work?  Or that heatsink is too small. By the way I don't have any of the parts for this yet.  That's why I'm asking the questions now so I don't order the wrong stuff.
  9. Um...Me123

    BENCH POWER SUPPLY

    Thanks for your responses guys I'm just turing 16 so your a great help for me! You said the LCD would jump all over...would that just be the tenths (hundreths)? because that wouldn't bother me that much.
  10. Um...Me123

    BENCH POWER SUPPLY

    More questions!!!!!! I can't find a 4.7K pot--will a 5K be ok and if so it needs to be a linear taper? Can the 2 capisitors (thats what they are aren't they?) both be radial ones? I want to ad a LCD (http://www.allelectronics.com/cgi-bin/category.cgi?item=PM-21) but where should I put it in...
  11. Um...Me123

    BENCH POWER SUPPLY

    I'm sorry that I can't put all my questions together and not keep posting all the time AND I'm sorry that I'm too dumb to be able to figure this out for my self. enough apologies I read somewhere in the discussion board something about the voltage of the bridge-it was something low like 30V...
  12. Um...Me123

    BENCH POWER SUPPLY

    Aren't we using an AC to DC transformer here? This power supply isn't for AC current is it? (the output that is) Well I think I get that part...second question: I'm still learning about the properties of electricity but I was looking at www.allelectronics.com and they dont have a 28V trans.
  13. Um...Me123

    BENCH POWER SUPPLY

    does 4K7 = 47k?  for the pot
  14. Um...Me123

    BENCH POWER SUPPLY

    I just posted in that discussion about the one supply so please check that out because always need lots of help ME---> ???.
  15. Um...Me123

    BENCH POWER SUPPLY

    I was lookiing at that second bench supply (the .pdf one) and I it looks pretty complicated (for me) but I think I can do it if I really try.  I just notice one quick thing (and I would have WAY more questions but I can go to my brother for those)...What's a DPCO (toggle) switch??..I know all...
  16. Um...Me123

    BENCH POWER SUPPLY

    ??? I'm an almost complete beginner to this hobby and haven't made anything beyonde a circuit with switches, LEDs, and resistors but have been learning fast.
  17. Um...Me123

    Can you put a dimmer on LEDs?

    So as long as the pot is after the resistor I'm ok?  Sorry guys I know almost nothing about this stuff.  Yes I do know the calculations and I'm using the LEDs to light the interior of my boat (not panel light) and I'm not using a curcuit board of any kind.
  18. Um...Me123

    Can you put a dimmer on LEDs?

    Sorry this is another really easy question.  Can you put a dimmer on LEDs or is there no "space" (for lack of a better word) between when they have enough voltage to light up and their max voltage?
View older results
Top