=== projector ===
  * https://github.com/beagleboard/beaglebone-black/wiki
  * https://beagleboard.org/latest-images
  * https://www.ti.com/tool/DLPDLCR2000EVM
  * {{:ti_dlp_lightcrafter_display_2000_evm_user_s_guide_dlpu049c.pdf}}
  * {{:ti_dlp_system_design_brightness_requirements.pdf}}
  * {{:programmers_guide_dlpu013a.pdf}}
  * https://polyfractal.com/post/lcos-light-engine/- nice teardown
  * AAXA HD Pico Mini LED Projector ([[https://www.amazon.com/gp/product/B01MCY4KYH/|AMZ]])

<code>
cd /opt/scripts/device/bone/capes/DLPDLCR2000/
cat README.txt
tar -xvf dlp_lightcrafter-1.0.19.tar.gz
cd dlp_lightcrafter-1.0.19
sudo python setup.py install
</code>
run mplayer
<code>
sudo apt install mplayer
export DISPLAY=:0
wget https://idiot.io/wp-content/uploads/Electrodible/electrodibels-rotate.mp4
mplayer electrodibels-rotate.mp4
</code>
=== retrofitting a pico-projector to a UV lithography station for etching ===

<carousel infinite=true&slidesToShow=4&slidesToScroll=3&dots=true&rows=1&touchMove=true>
{{:picolito:whatsapp-image-2019-04-11-at-21.18.45.jpeg| the original optics }} 
{{:picolito:whatsapp-image-2019-04-11-at-21.19.52.jpeg| removed the blue and Green LEDs}}
{{:picolito:whatsapp-image-2019-04-11-at-21.21.13.jpeg}} 
{{:picolito:whatsapp-image-2019-04-11-at-21.20.59.jpeg|two options, the 1W fat one and the fancy 3W guy}} 
{{:picolito:whatsapp-image-2019-04-11-at-21.21.18.jpeg|top view without the B/G LEDs}} 
{{:picolito:whatsapp-image-2019-04-11-at-21.22.58.jpeg|everything is glued, had to break the half mirros}} 
{{:picolito:whatsapp-image-2019-04-11-at-21.24.27.jpeg| is this a UV filter? elad says nope}}
{{:picolito:whatsapp-image-2019-04-11-at-21.24.52.jpeg}}
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{{:picolito:whatsapp-image-2019-04-11-at-22.37.02.jpeg}}
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{{:picolito:whatsapp-image-2019-04-11-at-23.31.59.jpeg}}
</carousel>