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  1. A

    Design new 0 to 30V power supply.

    You have accidentally attached a much earlier asc version.
  2. A

    Design new 0 to 30V power supply.

    This is great Hero, as you say the charging of C1 is evident as it is during a normal star-up. I agree, the recovery profile is not too important. I see that the under/overshoot is minimal. Could you also run a sim with the load changing from 10% to 100% and back? That would be important. Also...
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    Design new 0 to 30V power supply.

    I thought you posted that as a topology example as you had also already mentioned using -0.6V. But PICMaster copied that in his simulator. Maybe that's why you got even worse result PICMaster. So we have decided to include a small negative supply to get the output to zero. Hero, will you look...
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    circuit help

    Do you want to build it entirely on your own, or buy a few systems and put them together? What will the strain gauge be used for?
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    A cool project - Replicate Steorn's Orbo - A back EMF-less free energy motor!

    What is Steorn's main funding source?
  6. A

    Design new 0 to 30V power supply.

    Can you create a negative voltage without using a doubler with the way the centre tap is connected? D3 and D4 route the negative half cycles to ground potential and the centre tap is connected to V+. I dont think it's possible. Using a doubler to create just about -0.7 volts sounds overly...
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    Design new 0 to 30V power supply.

    Maybe we can look at charge pump inverter for the op-amp supply, like the one attached. This config offers a -Vin and +2xVin.The only problem is tha te maximum Vin is 20VDC so some sort of preregulation will be needed from the V+ line. Edit:  Wouldn't adding a resistor from Iout node to ground...
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    patulong nmn po sa pagprogram ng pic 16f84.

    Use an online translator like babelfish to translate your post to English.
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    looking for a USB Digital Acquisition module

    If this is for personal use, I am sure you can find the SW from somwhere. If this is for professional use then the cost can be justified and expensed. If this is for personal but professional use then it is up to you to treat it as just personal or just professional use.
  10. A

    Design new 0 to 30V power supply.

    Can we add a negative offset?
  11. A

    Design new 0 to 30V power supply.

    I feel that they are the least intrusive. PWM is the other obvious way. C is my language of choice. Cad do several others if needed.
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    looking for a USB Digital Acquisition module

    www.ni.com www.mccdaq.com
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    Projects for a newbe

    All of these can be changed in user preferences.
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    Design new 0 to 30V power supply.

    So much information...I was only away for like 3/4 of a day! I would overrate the outputs (I, V) slightly to ensure that despite tolerances we have 30V, 5A. Welcome to the club. I think adding LEDs and indicators is trivial and could be left for later on. Pretty high? IMO the best of both...
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    precision photoemission assessment.

    We need to know that to calculate the current flow since you have an estimation of conductivity. Good luck!
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    UPS

    Ok.Decoding the post I think you mean that you have a 600VA UPS, normally used with a PC, and you want to connect a small wall transformer to it to power some device. The wall transformer is rated at 12V 1A. Yes, you can do that. The transformer's primary will most likely be rated for the same...
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    Projects for a newbe

    By diagrams I think you mean circuit schematics. EAGLE is prob the easiest, and common, software to import schematics and then transfer them to PCB. Multisim can also be used and it also offers a simulator and PCB design. TINA as above. Altium (also Cadence) is by far the best package you can...
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    MCCB problem

    Which one is it? T4, 5, 6, 7? http://www.abb.co.uk/product/seitp329/2deffbcd59f95e48c1256ed20037f66d.aspx?productLanguage=us&country=GB&tabKey=2 I think the best thing you can do is contact an ABB engineer for support on this. It's free.
  19. A

    Design new 0 to 30V power supply.

    Yeah, that is what I meant. Since using a higher volatge trafo will require more parts, in the final project it would be nice to have a trafo that can offer 5A without output ripple. How about arranging for the zener diode regulator across +V+6 and ground by increasing the zener voltage and...
  20. A

    Design new 0 to 30V power supply.

    I am just looking at the asc file. Maybe you should separate Vref for the current limit and use a third source for R12/R13. In fact, how about using a constant reference for U4 as that doesnt need to be variable. How about a circuit around D8? Current limit attack time? Are we strategically...
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