pov_globe
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pov_globe [2018/01/10 12:40] 66.190.155.97 |
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| I used an LED strip (neopixels are apparently not fast enough for a good POV display, so I used DotStar) instead of individual RGB leds and just glued it to the frame with contact cement. | I used an LED strip (neopixels are apparently not fast enough for a good POV display, so I used DotStar) instead of individual RGB leds and just glued it to the frame with contact cement. | ||
| - | I initially used a nano as the controller and and ESP8266-01 to give it WiFi capability, but Robert suggested I just use an ESP8266 Huzzah breakout board as the controller with built in WiFi. The built-in WiFi simplified the code considerably, and the faster speed (80 MHz vs 16 MHz) helped a lot as well. Robert even gave me one to use! Thanks, Robert! (and while I'm at it, thanks also to Avi for helping me understand how to write data to the LED strip without using a library - this really sped things up.) | + | I initially used a nano as the controller and an ESP8266-01 to give it WiFi capability, but Robert suggested I just use an ESP8266 Huzzah breakout board as the controller with built in WiFi. The built-in WiFi simplified the code considerably, and the faster speed (80 MHz vs 16 MHz) helped a lot as well. Robert even gave me one to use! Thanks, Robert! (and while I'm at it, thanks also to Avi for helping me understand how to write data to the LED strip without using a library - this really sped things up.) |
| The power supply is one we had at the space, salvaged from an old PC, and the motor controller was a cheap one ordered off of eBay. And, after many attempts at balancing the rotor with no armature holding the top stationary, I finally had to admit that a stabilizing arm was a necessity. The total cost of the globe was probably under $100 (but not by very much) with most of the expense coming from the LED strip and the motor. You could cut the cost considerably, I think, by using individual LEDs rather than a strip, but boy would you add a lot of work. | The power supply is one we had at the space, salvaged from an old PC, and the motor controller was a cheap one ordered off of eBay. And, after many attempts at balancing the rotor with no armature holding the top stationary, I finally had to admit that a stabilizing arm was a necessity. The total cost of the globe was probably under $100 (but not by very much) with most of the expense coming from the LED strip and the motor. You could cut the cost considerably, I think, by using individual LEDs rather than a strip, but boy would you add a lot of work. | ||
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| If anyone is interested in building one of these, I would be happy to share my files and advice from what I learned along way. | If anyone is interested in building one of these, I would be happy to share my files and advice from what I learned along way. | ||
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| + | I have also set up the ThinkPad laptop that runs the RAMPS printer to control the globe. Please don't do this without checking with me first, but the steps to do this are: | ||
| + | - click the Start button and run the Anaconda Prompt | ||
| + | - within the prompt window, type 'activate POVGlobe' to open the correct Python environment | ||
| + | - if this worked, you should see <POVGlobe> prepended to the prompt | ||
| + | - type 'idle' to open a Python editor | ||
| + | - select File/Open and open \Documents\POV Globe\Python_Code_POV_Globe\POV_Globe\globe_control.py | ||
| + | - select Run/Run Module to start the program | ||
pov_globe.txt ยท Last modified: 2018/01/10 12:40 by 66.190.155.97
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