Analog/Digital PAD-234

Discussion in 'General Electronics Chat' started by Petrucciowns, Aug 14, 2009.

  1. Petrucciowns

    Thread Starter Active Member

    Jun 14, 2009
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    I just got the Analog/Digital PAD-234 trainer, and I am trying to get the +15 volt dc variable power supply to work. The instructions in the manual state:

    "Located above the left to the breadboards and identified as 15 volts controlled by the appropriate knobs. (lower left hand corner of the top plate.)

    Connect the load between the tie blocks identified as +15 volts V and OV (ground.) Use the knob marked as + 15 volts to control the output voltage of this tie block"


    The problem is I can't find the +15 volts block or the OV block.


    Can anyone guide me with what I need to do?

    I have attached pics.

    Thanks, :)

    http://img228.imageshack.us/img228/2289/1000006.jpg

    http://img80.imageshack.us/img80/7842/1000007.jpg

    http://img199.imageshack.us/img199/284/1000008n.jpg
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Attached is my guess. Use the VOLTAGE ADJ knobs to adjust.
     
  3. Petrucciowns

    Thread Starter Active Member

    Jun 14, 2009
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    I tried running a wire from v+ to v-. The area you have circled, and I got smoke. It was my guess to, but I can't figure what the proper way to do it is. Thanks for your reply though.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Why would you do that? You shorted out both power supplies. Your instructions said,
    What is your load, i.e., what are you trying to apply power to?
    Those things I circled are tie blocks. One of the adjacent ones is marked "0". That means 0V (ground). Whatever you are trying to power up needs to be connected between +V and 0V.
     
  5. Petrucciowns

    Thread Starter Active Member

    Jun 14, 2009
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    Yeh, I have no clue why I did that. I have a wire from v+ to positive on the breadboard, and v- to negative on the breadboard. I tried running 0 to negative, but that didn't work. If I reverse them positive to negative and negative to positive it is a negative voltage. The thing is when doing it this way both knobs adjust the voltage. I am thinking this is the correct way though, because I can not find any other way.
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    If you wire it like this, then the adjust knobs should work independently.
    The buses that the black wires connect to will be GND (ground) for your circuit.
    This Assumes that the 0 tie block is connected to the +V and -V supplies. If not, connect the black wires to GNd (the black binding post) instead. You should check your voltages with a multimeter first, to find out whether 0, or GND, or both, is the reference for the +V and -V supplies.
     
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