This repo contains supporting files for the NREL PVRW 2023 poster, EL with the Raspberry Pi Camera Module 3, by Will Hobbs and Tim Silverman (preprint).
Notes on the software/network settings used for the live EL demo are in live-demo-setup-notes.md.
EL images used in the poster are in the images folder. Metadata for the images are in the table below.
| Image File | Camera | Exposure Time (s) | Gain | Note |
|---|---|---|---|---|
| picture_01c.jpg | HQ | 1.5 | 6 | - |
| picture_02a.jpg | HQ | 1.0 | 7 | - |
| picture_03.jpg | HQ | 0.5 | 8 | - |
| picture_04.jpg | HQ | 0.1 | 16 | - |
| picture_05.jpg | V3 | 1.5 | 6 | - |
| picture_06.jpg | V3 | 1.0 | 7 | - |
| picture_07.jpg | V3 | 0.5 | 8 | - |
| picture_08.jpg | V3 | 0.1 | 16 | - |
| picture_10.jpg | V3 | 1.5 | 6 | Frame edge |
| picture_16.dng | V3 | 1.5 | 2 | Raw .dng |
| picture_16.jpg | V3 | 1.5 | 2 | .jpg accompanying the raw image |
Images were catured with commands like the following:
libcamera-still --awbgains 1,1 --gain 2 --shutter 1500000 -r -n -o picture_16.jpgThis was built around a Raspberry Pi Zero 2 W (https://www.raspberrypi.com/products/raspberry-pi-zero-2-w/) and the Camera Module 3 NoIR (https://www.raspberrypi.com/products/camera-module-3/?variant=camera-module-3-noir) with an Adrucam Pi Zero camera cable (https://www.amazon.com/dp/B085RW9K13).
Filters similar to the following were used:
- https://www.newport.com/p/10CGA-1000
- https://www.edmundoptics.com/p/1000nm-254mm-dia-colored-glass-replacement-longpass-filter/43198/
The live EL demo setup used the Newport 1000 nm filter, custom ordered in 49.0 mm diameter. The filter was placed inside of a standard 52 mm photoggraphy filter ring (https://www.amazon.com/AmazonBasics-UV-Protection-Lens-Filter/dp/B00XNMWCF8/) after disasembling the filter and removing the UV glass with a lens spanner tool (https://www.amazon.com/Neewer-Professional-pointed-Spanner-Repairing/dp/B00J5F6O92).
The case used for the Pi Zero 2 W and camera was based on https://www.thingiverse.com/thing:2300226, modified to add support for a 52 mm filter. The Camera Module 3 did not fit in the case, and manual adjustments were needed after 3d printing the case, so I don't have a usable set of part files to share.
The live demo used:
- Newpowa 5W mono module, https://www.amazon.com/gp/product/B00L60Y6Y4/
- Voltaic P126, https://www.adafruit.com/product/5366
Safety note: There are hazards involved with working with electricity and batteries! Make sure you know what you are doing, and don't do anything you are not comfortable with. These notes are for information purposes only.
I built a custom DC power supply that powered by a power tool battery pack. A benchtop power supply would be simpler, assuming you have access to an AC power outlet. I've used this before: https://www.amazon.com/gp/product/B07512KQDW.
Parts for the custom battery-powered power supply:
- 3-7/8" X 5-7/8" X 2-1/16" Snap Together Plastic Enclosures 100 x 150 x 50mm Enclosure, https://www.mpja.com/3-7_8-X-5-7_8-X-2-1_16-Snap-Together-Plastic-Enclosures/productinfo/37293%20BX/
- Red, Black & Green 30 Amp Binding Posts Set, https://www.mpja.com/Red-Black-38-Green-30-Amp-Binding-Posts-Set/productinfo/36363+BP/
- UCTRONICS U6229 variable power supply (I think this is more generally known as a "XYS3580", available under other brand and model numbers): https://www.amazon.com/dp/B0861LGM15
- Power Wheels tool battery adapter with inline switch and fuse
- Makita version: https://www.amazon.com/dp/B09HTNR9F3
- Get one compatible with your power tool batteries!