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# WPP Standardized Base
The core structure of the Wisconsin Photoreactor Platform. Each reactor shares this component. It has a 140 mm by 140 mm footprint and is compatible with typical laboratory stir plates.
Through variation of the LED star integrated into a base, the user can control the wavelengths of light delivered by the photon source to a reaction vessel.
See fabrication instructions for LED star installation instructions. See `photon-source-leds` directory for list of LED stars confirmed compatible with the WPP architecture.
### Bill of Materials
| reference | manufacturer | part number | price | vendors |
| :---------------- | :----------- | :---------------- | :----- | :------ |
| standoffs for PCB | RAF | 4505-440-AL | $1.00 | [DigiKey](https://www.digikey.com/en/products/detail/raf-electronic-hardware/4505-440-AL/7680509) [Newark](https://www.newark.com/raf-electronic-hardware/4505-440-al/no-plate-hex-male-female-standoffs/dp/95Y3120?st=4505-440-al) |
| LED star heatsink | Ohmite | SV-LED-113E | $3.00 | [DigiKey](https://www.digikey.com/en/products/detail/ohmite/SV-LED-113E/2509399) |
| LED star | Various (see `photon-source-leds` directory) |
| heat-set inserts | Virtjoule | | $0.00 | [Amazon](https://www.amazon.com/gp/product/B07BH5X252/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1) |
| fan | Noctua | NF-A12x15 PWM | $20.00 | [Amazon](https://www.amazon.com/Noctua-NF-A12x15-PWM-Premium-Quiet/dp/B071W6HJP6) |
| 1/4" screws | Fastenal | 0146455 | |
| 3/4" screws | Fastenal | 72490 | |
All prices are extended estimates in USD.
In general these are overestimates, so this should be an upper-estimate on cost.
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