Recent content by liquibyte

  1. liquibyte

    8x8x8 led cube light

    There's an executable in there.  Why?
  2. liquibyte

    8x8x8 led cube light

    So, you come to a board that posts schematics regularly for projects and post a project without any real information and then request peoples email addresses to send them information?  Does anyone here think this is a good idea to get information on the project given that a quick ebay search...
  3. liquibyte

    0-30 VDC Stabilized Power Supply 0.002-3 A

    I'm sorry, I should have said I think it's the wrong value for this configuration.  I'd have to work out the math for it but I think you'd do better with a much lower value at 10A output.  Doing that would require also adjusting the resistor values around the voltage reference and current...
  4. liquibyte

    0-30 VDC Stabilized Power Supply 0.002-3 A

    R7 is also the wrong value for this configuration.
  5. liquibyte

    0-18V Pos/Neg 1A Current Limited

    I tried my best to fix a few of the more glaring issues that I had while I was testing.  The one thing that always bothered me was the current sense heater.  I felt like I should be using this as an on demand water heater.  I'm actively working on prototyping out the changes to see what works...
  6. liquibyte

    0-18V Pos/Neg 1A Current Limited

    You can do a search for output decoupling caps to ground and you will find several references to 1uF to 2.2uF for the values in an effort to solve oscillation.  I used these because of that actual problem I was having.  I do understand each component in the circuit having studied it extensively...
  7. liquibyte

    0-18V Pos/Neg 1A Current Limited

    Really, 20mV p/p is worse stability?  I've got a nice scope trace I'd like you to look at then.
  8. liquibyte

    0-18V Pos/Neg 1A Current Limited

    The fact that you even suggested that circuit tells me that you either know nothing and are trying to fake it or that what you think you know is entirely wrong.  Linear regulators as a lab supply is just stupid and I'm tired of seeing that dumbass circuit all over the net being suggested as so.
  9. liquibyte

    0-18V Pos/Neg 1A Current Limited

    Your change adds significant oscillations to my simulation output on the positive side of things. As for the 2.2u cap, it could have just as well been 1uF but 2.2uF is what I had on hand that solved the issue I was working on also in regards to oscillations.  I got the value from doing some...
  10. liquibyte

    0-18V Pos/Neg 1A Current Limited

    You guys are late to the conversation.  I've had the boards made and from my testing things work rather nicely.  I did make a mistake on the gerbers and forgot to connect D2 to R2 but since it was a short hop, I left the lead on the zener long, folded it over and soldered it to the lead of the...
  11. liquibyte

    0-30V Stabilized Power Supply

    Yeah, I know.  I did the math from the datasheet and given what the simulation is giving me, I'd say the device can probably handle it.  I don't have the equipment to lay this out and test in the real world but PD from both amps only total around 300mW and if I'm reading things right, the 2142...
  12. liquibyte

    0-30V Stabilized Power Supply

    Many, many questions keep getting asked about this thing and people keep attempting to build it without even knowing the basics, why I don't know.  The power supply suffers from a couple of issues that have never really been adequately addressed so this is going to be my attempt at bringing this...
  13. liquibyte

    control through internet

    Seriously? https://www.google.com/search?q=control+pic+through+internet&ie=utf-8&oe=utf-8
  14. liquibyte

    Power Supply1.2~30VDC, 1.5A

    I guess one of the learning experiences when one gets into this hobby should be blowing things up so that you learn how not to. I just posted these from the archive that the user posted because just about everything was a pdf file save the schematic. I have no idea what format the design files...
  15. liquibyte

    Power Supply1.2~30VDC, 1.5A

    This has been done over and over again all over the internet.
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