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  1. FireFly3

    0-30 Vdc Stabilized Power Supply

    If meters are to be added to this power supply, I believe they should powered by their own transformer. Am I right? So to add a cooling fan, should that be powered by the power supplies transformer, the meters' transformer or a third transformer of its own? ???
  2. FireFly3

    Convert 0-30V 3A PSU to 5A or more

    No, I haven't built it yet. I haven't had enough free time lately. I also took a detour to try the laser toner/inkjet photo paper transfer method for making PCB's. IMHO, don't waste your time. Now I'm waiting to see what comes out of this discussion about the proper transformer to use as...
  3. FireFly3

    Convert 0-30V 3A PSU to 5A or more

    Staigen, thanks alot for the info. For 3A and 30V output, you believe the 24V/3A transformer is a little light. What transformer would you recommend to get the 99 VA you are suggesting? Maybe around 25V and 4A? What tranformer would you suggest if this power supply is converted to 30V and...
  4. FireFly3

    0-30 Vdc Stabilized Power Supply

    Thank you very much, mixos. I'll have to think on that for a while. You confirmed my suspicions: I'm just slightly in over my head! ie. This power supply does 30V/3A; the meter can do 20V/200V and 2A. Have a happy New Year!
  5. FireFly3

    0-30 Vdc Stabilized Power Supply

    I think I understand how to add a voltmeter to this project though, I've been wrong before! It's the current part I'm a little confused about. An ammeter wouldn't show any reading until the power supply was connected to a load, right? So, can a meter (ammeter?) be added to this project to...
  6. FireFly3

    LED Flashlight

    Has anyone used one of these Lightwave 4000 flashlights? http://www.lightwave-4000.com/ It uses 10 LED's and they go for about $35 U.S. on eBay. Are they as good as they sound? Maybe it would be interesting to convert the head of a conventional bulb flashlight to one of these LED types. Can...
  7. FireFly3

    Tranformer questions

    I have a transformer out of an old Sanyo receiver that I would like to use for tinkering rather than contribute to the landfill. I realize tranformers aren't rated by pounds/kg but it seems rather substantial (and useful?). It's in a molded metal "container" with some numbers on it that are...
  8. FireFly3

    0-30 Vdc Stabilized Power Supply

    I'm beginning to wonder if this is a little too much for my first project but I'm learning lots! On the Parts List, item: D1, D2, D3, D4 = 1N5402,3,4 diode 2A - RAX GI837U ...has me a little confused. This means the bridge would be four 1N5402's OR four 1N5403's, etc. and not one diode of...
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