PiCasso Design Challenge - POV Globe Blog 12

RE: PiCasso Design Challenge - POV Globe Blog 12

balearicdynamics — Fri, 31 May 2019 09:36:25 GMT

Dale looks really good!.

Can you give some more details on how do you plan to design the globe? I think you should program the graphic far from the globe else you spend all your development time to see the light changing [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-6dc412c9-0015-4d86-8bc5-0d8d6cd798e7/contentimage_5F00_2516.png:16:16]

Enrico

RE: PiCasso Design Challenge - POV Globe Blog 12

jc2048 — Fri, 31 May 2019 07:44:45 GMT

Very nicely done - I wish I had your construction skills. It's going to look quite superb when you have the globe spinning in there.

How does the Pi know where it is when it's displaying? Do you have a slotted-opto part or a Hall effect sensor, or something like that, to give it a reference point?

RE: PiCasso Design Challenge - POV Globe Blog 12

dougw — Fri, 31 May 2019 05:26:15 GMT

This is a fabulous project with outstanding execution.

Photographing flashing LEDs will always be highly problematic. If you can get a static pattern and take a time exposure through dark sunglasses, the pattern may come out properly ... maybe.

RE: PiCasso Design Challenge - POV Globe Blog 12

dixonselvan — Fri, 31 May 2019 04:03:39 GMT

[mention:1bc1ed25c74e4385bcbca428cd9ea7e7:e9ed411860ed4f2ba0265705b8793d05] wow really the LEDs are hypnotizing!

Hope there should be an easy way to implement the world map in the globe. I assume the below can be a way we can implement it,

1. Take an image of the world map

2. Convert into pixel values

(https://stackoverflow.com/questions/43719451/python-convert-image-to-a-string-of-pixel-values - this could help)

3. Map pixel values to RGB LED matrix

4. This could be tricky, we will now have a format which can be displayed in flat displays something like matrix displays/ monitor etc. We have to convert it to a single strip column wise and move it column by column. Like C1 then C2 till Cn the viewer should have a glimpse of C1 to Cn in the same time. (Let me know if this is confusing)

5. You will now have a static image of the world map ... then you can try animations!

This is a very high level approach and I am not sure if this will work since I haven't tried it so far ... let me keep you posted if I find some more help!

Thanks,

Dixon Selvan

Edit:

I think adding black foam or any non-reflecting substance in the box holding the globe would make it look like only the globe is present. However the current version is cool as well!