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  1. effenberg0x0

    0-30V Stabilized Power Supply

    Agreed. Had to opportunity to see the defacement part of it.
  2. effenberg0x0

    0-30V Stabilized Power Supply

    Some posts in some threads are missing, including this one. I believe two/three pages of posts here. Mixos said it was a hack attempt. At least we didn't lose everything this time.
  3. effenberg0x0

    0-30V Stabilized Power Supply

    LOL, I am, I am. Just having a bad week. Xmas is not a happy holiday for me at all. Here we go: YEY!!!!!!!!!!!!!! A new PSU!!!!!!!!!!!!!! Thanks Santa!!!!!!!!!!!!! :D :D
  4. effenberg0x0

    0-30V Stabilized Power Supply

    The link for the project discussion, in the original project page, was updated to point here. This thread content beats up any FAQ IMHO. There's a recent post in this thread in which someone posted a block diagram of this PSU. It might help newbies. Hero et al are discussing a new 0-30V PSU in...
  5. effenberg0x0

    0-30V Stabilized Power Supply

    Audioguru, You obviously have a very detailed understanding of the circuit and expected behaviors. Do you use Spice or other software for these analysis?
  6. effenberg0x0

    0-30V Stabilized Power Supply

    The original is 0R47 5W. Your's (fixed 3A version) is also 0R47, but 10W. Do you think two 0R27 10W in series is still too little and risky? Thanks, Effenberg
  7. effenberg0x0

    0-30V Stabilized Power Supply

    For the 3A version, R7 is 0R47 10W. I got 0R27 10W units. If i put two of them in series I get 0R54 and better heat dissipation (two components instead of one). But what would be the downsides?
  8. effenberg0x0

    0-30V Stabilized Power Supply

    As the voltage oscillates in the outlet, I can also see voltage changes in the Power Supply Output. Voltage in the outlet oscillates a lot more than I thought, about twice every minute +1 to +4V. Can't still calculate how much oscillation this creates in the PS output (single channel...
  9. effenberg0x0

    0-30V Stabilized Power Supply

    Has any of you ever used these "PC OScilloscopes" that use the PC USB port? What about even cheaper units, that use the PC Mic In port? I'd like to hear some opinions on the quality of these things but can't find a user.
  10. effenberg0x0

    0-30V Stabilized Power Supply

    Pi (π) ? :)
  11. effenberg0x0

    0-30V Stabilized Power Supply

    I think any decent Power Supply project built correctly will be better than commercial units. I'd say more than 90% of the commercial units I see in the market are cheap things that don't look like they will last 6 months. And, of course, it's always more entertaining to build it, no matter the...
  12. effenberg0x0

    0-30V Stabilized Power Supply

    A good idea. My current heatsinks are so inadequate I'm considering leaving fans on non stop. Other options are Peltier modules, CPU coolers, etc...
  13. effenberg0x0

    0-30V Stabilized Power Supply

    Yes, definitely. I want my PS to have two outputs. and I got two LCDs here for the meters.
  14. effenberg0x0

    0-30V Stabilized Power Supply

    It will take a while for me besamartis. I have one month to write an essay describing the operation and importance of each component in this circuit, the main individual circuits, possible changes/updates, etc. A lot of it is still not clear to me and I have to study more to get it done. I have...
  15. effenberg0x0

    0-30V Stabilized Power Supply

    Earlier today I had requested the admin of the website to update the wrong link at the original project page (it was ponting to a thread that was lost and not to here). It is done now. Maybe other users will read this thread before building the wrong project. Regards, Effenberg
  16. effenberg0x0

    0-30V Stabilized Power Supply

    Redwire said in a previous post that me made his unit using a microwave oven transformer. The unit was 7A or more I think. Actually I almost cried when I read this: If I had searched at repair shops, electronics dump places or even sites like eBay, I would be able to buy a broken microwave oven...
  17. effenberg0x0

    0-30V Stabilized Power Supply

    Any transformer up to 2A is common here and costs an average of US$8. 3A transformers are a little harder to find and were priced at an average of US$15. 4A are WAY hard to find. They were priced at US$30. 5A units were simply nowhere to be found. After searching for an entire week I found only...
  18. effenberg0x0

    0-30V Stabilized Power Supply

    Besarmatis, I couldn't find transformers at reasonable prices in the market here too. My solution was to have them built in a small shop that does it on demand. I managed to get two units for half the average price of a single unit in the market. They were built exactly to my specs (core, wire...
  19. effenberg0x0

    0-30V Stabilized Power Supply

    Is it possible to modify the link in the original project that points to the lost thread so that it points to this thread? Besarmatis: I have posted a table comparing parts lists for the original, fixed and 5A versions some days ago in this thread.
  20. effenberg0x0

    0-30V Stabilized Power Supply

    Sorry, I'm new to Eagle. It was setup like this and I didn't know I could put a white background. Now I know, thanks. I have attached the new image. Thank God you saw it. I couldn't find TLE2141 or MC34071 in Eagle libs, so I used another opamp that has the pins inverted. Its fixed now. Yes, I...
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