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  • Author Author: dwinhold
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PiCasso Design Challenge - POV Globe Blog 6

dwinhold

This update is the wiring of the power to the globe. The below photos and explanations of each, describe exactly what I did. I also include a video at the end.

 

First photo is of the Positive wires that power the Raspberry Pi and the LED's:

 

image

 

Next is the Negative out:

 

image

 

Next photo is of the underside at the bearings. The spindle is hand made of wood on a wood lathe. I drilled a hole down the middle for the wire to travel:

 

image

 

The last is a video of the power connected turning on LED's:

 

 

Hope you enjoyed this update. As always, any questions, comments or ideas you have, please leave a message below!!

 

Dale Winhold

  • Dale,

     

    You are making some good progress with the mechanical parts. I look forward to seeing it all up and running and making the globe visible.

     

    Dubbie

  • in reply to dwinhold

    An I like the "belt" which you use have right now image It brings an additional artistic feeling to the project!

  • in reply to balearicdynamics

    Hi Enrico

     

    I like the idea of a soldered board instead, I will definately be changing that out. As for the belt, I already have the type you are mentioning. Since I have to change out the motor I will be changing the belt as well.

     

    Thank you for the ideas

     

    Dale

  • Good update, Dale.

     

    I have a couple of points to have some clarification on your last progress, something that IMHO may risk to introduce some weakness to the rotation. As you should reach a considerable RPM and the globe is not small, why you don't use direct wiring and a breadboard PCB (soldered, I mean) instead of the plastic one? Also if it is relatively lightweight, as the rotation speed increase as much its mass influences a possible vibration or worst. With a soldered small PCB you can keep it perfectly aligned to the rotation axis eliminating this risk.

     

    The second is respect to the traction method. The new motor you used seems robust and reliable for the scope. As you already have trapezoidal pulleys, why don't use a trapezoidal belt instead of those I see? I mean those belts used for the car motors. You can find for cheap almost everywhere as spare parts of every diameter.

     

    Enrico

  • Hi Dale, a great update, thank you. I like your drive setup and belt (which looks like a piece of cord). I hope all goes well and looking forward to reading about your progress.

     

    Rod