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    Without seeing photos it's hard to guess, but it...

    Without seeing photos it's hard to guess, but it could be a short circuit.
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    One of the 15A batteries. The protection circuit...

    One of the 15A batteries. The protection circuit is kicking in for over current on your battery.
  3. Thread: Crystals...

    by jbkuma
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    The problem with a cut and polished crystal is...

    The problem with a cut and polished crystal is that it won't capture the light.
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    Sounds like you have an inadequate battery.

    Sounds like you have an inadequate battery.
  5. No, it's meant to allow you to rotate the parts...

    No, it's meant to allow you to rotate the parts for alignment.
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    you can even get sheet aluminum. If you are...

    you can even get sheet aluminum.

    If you are doing just lettering you don't need to immerse the part. You are actually better off connecting the ground to your work piece and using an alligator...
  7. Thread: Crystals...

    by jbkuma
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    2,367

    Focus is actually the problem, not the goal.. You...

    Focus is actually the problem, not the goal.. You don't want a flawless crystal. If it's somewhat cloudy, cracked, or has other inclusions in it, then it will look better because it will catch the...
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    correct

    correct
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    Digital Calipers are your friend! They are...

    Digital Calipers are your friend! They are inexpensive and invaluable.
  10. Driver gives constant current no matter what the...

    Driver gives constant current no matter what the voltage, resistor just limits the current based on a specific voltage. If you calculate your resistor at 3.7v you will get much higher current at...
  11. No. If serial you will need a 7.4v. A saber...

    No.
    If serial you will need a 7.4v.

    A saber with no electronics, just an LED is what we call a stunt saber.
  12. Are you just building a stunt saber (no...

    Are you just building a stunt saber (no sounds/effects)? It's capable of 1000ma, so that is what you would use, or 750 if you want it to run cooler and have better battery life. You need a driver...
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    Agreed!

    Agreed!
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    I have been charging and programming through the...

    I have been charging and programming through the blade socket using aviation style connectors for a few years now and it is definitely my preferred method. I have also made custom PCBs that allowed...
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    It shouldn't matter how close the battery is to...

    It shouldn't matter how close the battery is to the speaker, ideally the back of the speaker should be sealed off.

    I've been doing a lot of real world testing with specialized metering equipment. ...
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    These things are both very well discussed and...

    These things are both very well discussed and available in the manual.
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    I disagree. Cellophane works great. As one of the...

    I disagree. Cellophane works great. As one of the pixel blade originators, I've been using it for years.
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    Please share how your blade is constructed, what...

    Please share how your blade is constructed, what board you are using, what settings, etc.
  19. There is no benefit, and the coating will yellow...

    There is no benefit, and the coating will yellow over time.
  20. This was a few years back. I had it printed at...

    This was a few years back. I had it printed at shapeways, although I generally print everything at home these days unless someone specifically wants it printed elsewhere.
  21. https://jbkuma.com/workshoppe/wp-content/uploads/2...

    https://jbkuma.com/workshoppe/wp-content/uploads/2017/04/20170308_203936-e1493672964764.jpg

    I did make this cardboard chassis, but it was only a temporary mock up and obviously more complex than...
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    Another option would be to apply your mask, cut...

    Another option would be to apply your mask, cut along the seams, separate the parts, then mask off the rest of the exposed parts.
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    Sometimes there will be a coating on the pads....

    Sometimes there will be a coating on the pads. Some mild abrasion and flux should help.
  24. The flammability isn't an issue.

    The flammability isn't an issue.
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    I printed a design in both pla and petg. They are...

    I printed a design in both pla and petg. They are both quite adequate.
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