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  1. M

    Faulty AC-DC Adapter?

    Alright. I was able to take better measurements and I wrote them down because they were very innaccurate, but at least it was variable. Also I'm really interested in the idea of building my own power supply in the future. Thanks for the help.
  2. M

    Faulty AC-DC Adapter?

    I bought a Trisonic TS-506B AC-DC adapter that allows you to choose the ouput voltage: 1.5-3-4.5-6-7.5-9-12. The purpose of this was to power my breadboard and to also be used for an arduino board every now and then. I cut off the tip to expose the wires, and after pulling out my multimeter have...
  3. M

    How to power max7219 with 8 * 40 LED matrix

    I've got a li-po that is 2S 7.4V 800mAh that I could use I guess. But how do I hook up the voltage regulator and power each individual board? can you give me an idea of what the schematic would like like?
  4. M

    How to power max7219 with 8 * 40 LED matrix

    I would like to be able to use an Arduino Nano to control a matrix of 320 LEDs (8 * 40). I understand that both the arduino and the max7219 need 5v of power, but I'm not sure how to supply it. I was thinking I'd power the arduino separately from the max7219 and use 4 AA rechargable batteries to...
  5. M

    Good Cheap Multimeter

    Hi I'm getting into electronics (I bought the book Make: Electronics) and am in need of a multimeter. I was looking at the Mastech MS8268 $30 because it seems to have great reviews. I'm wondering if this is overkill or perfect for what I need. If you have any suggestions please leave a link...
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