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Here is everything you need to create your own STELLA 2.0 including print instructions for the 3D printed parts and elements that need to be purchased.
3D Parts Required for Handheld Spectrometer
Housing Cover
Download .STL
Thermal IR Sensor Spacer
Download .STL & .STEP
Lower Housing
Download .STL
Processor Spacer
Download .STL
Non-Required 3D Parts for Handheld Spectrometer
Parts to Purchase
| Line | Item | Qty | $ Each Approx | Part Number | Link |
|---|---|---|---|---|---|
| 1 | Protoboard, full size: Permaproto (pk 3) | 1 | $7 | 590 | https://www.adafruit.com/product/590 |
| 2 | Header Pins: 6 segments at 16 places each (pk 10 at 36 pins each) | 1 | $5 | 392 | https://www.adafruit.com/product/392 |
| 3 | Sensor: air temperature: MCP9808 | 1 | $5 | 1782 | https://www.adafruit.com/product/1782 |
| 4 | Sensor: visible spectrum AS7262 | 1 | $20 | 3779 | https://www.adafruit.com/product/3779 |
| 5 | Sensor: near infrared spectrum: AS7263 | 1 | $28 | SEN-14351 | https://www.sparkfun.com/products/14351 |
| 6 | Sensor: thermal infrared surface temperature: MLX90614 at 35º FOV (alt part, more commonly available, has a 90º FOV) | 1 | $34 | MLX90614ESF-BCC-000-TU | https://www.digikey.com/en/products/detail/melexis-technologies-nv/MLX90614ESF-BCC-000-TU/3641019 |
| 7 | Switch, Pushbutton, tactile | 1 | $3 | 1119 | https://www.adafruit.com/product/1119 |
| 8 | Switch: push on - push off | 1 | $2 | GPTS203211B | https://www.digikey.com/en/products/detail/cw-industries/GPTS203211B/3190590 |
| 10 | LED, red (pk 25) | 1 | $4 | 299 | https://www.adafruit.com/product/299 |
| 11 | Capacitor, 10uF 25V | 1 | $1 | many | https://www.digikey.com/en/products/detail/nichicon/UMA1E100MDD1TP/4312710 |
| 12 | Data logging card: Adalogger Featherwing | 1 | $9 | 2922 | https://www.adafruit.com/product/2922 |
| 13 | Headers, stacking, set for Feather, 16 places and 12 places, 1 each | 1 | $1 | 2830 | https://www.adafruit.com/product/2830 |
| 14 | Microprocessor: Adafruit Feather nRF52840 Sense with Bluetooth | 1 | $40 | 4516 | https://www.adafruit.com/product/4516 |
| 15 | Battery: 400mAh | 1 | $7 | 3898 | https://www.adafruit.com/product/3898 |
| 16 | Battery: CR1220 | 1 | $1 | 380 | https://www.adafruit.com/product/380 |
| 17 | Memory Card: micro SD, 8 GB, with adapter | 1 | $10 | 1294 | https://www.adafruit.com/product/1294 |
| 18 | choose one: USB cable, micro b to A | 1 | $3 | 592 | https://www.adafruit.com/product/592 |
| 19 | choose one: USB cable, micro b to C | 1 | $4 | 3878 | https://www.adafruit.com/product/3878 |
| 20 | Optional: Connector | 1 | $1 | B3B-PH-K-S(LF)(SN) | https://www.digikey.com/en/products/detail/jst-sales-america-inc/B3B-PH-K-S-LF-SN/926612 |
| 21 | Optional: remote pushbutton switch | 1 | $8 | 4431 | https://www.adafruit.com/product/4431 |
| 22 | Optional: remote switch cable | 1 | $1 | 4336 | https://www.adafruit.com/product/4336 |
| 23 | Resistor 100Ω 0.1W | many | $1 | 2 | https://www.adafruit.com/product/4293 |
* Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
