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Here is a list of all the materials that were used in this project along with the quantity and cost. If you do not have any magnets they can be removed from the build with out affecting anything except not having the case magnet to the wall or metal objects. You can use different colors for each button to help make the buttons easier to remember.
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| Item | SKU | Count | cost | Link |
| ----------- | ----------------------------------------------- | ----- | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| ESP32 | 38 pin USB-C ESP Dev Board | 2 | $3.73 | https://www.aliexpress.us/item/3256806034074322.html |
| Button | TWS4417-250AT | 8 | $0.91 | https://www.aliexpress.us/item/3256804125700359.html |
| Buzzer | TZT High Quality Passive Buzzer Module | 1 | $0.83 | https://www.aliexpress.us/item/3256806130276274.html |
| OLED Screen | 0.91 Inch OLED Module | 2 | $2.97 | https://www.aliexpress.us/item/3256805967573053.html |
| PCB | JLC PCB | 5 | $3.75 | https://jlcpcb.com |
| Magnets | # 1/4" x 1/2" Rare Earth Round Magnet - 8 Count | 8 | $14.23 | https://www.menards.com/main/hardware/fasteners-connectors/specialty-fasteners/magnets/magcraft-reg-rare-earth-round-magnets/nsn0641/p-1565073052971-c-19644.htm |
| Bolts | M2.5 X 16mm | 8 | $8.11 | https://www.aliexpress.us/item/3256801289903040.html |
| Inserts | M2.5(OD 3.5mm) length 4mm | 8 | $1.74 | https://www.aliexpress.us/item/3256803396040989.html |
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| 3D print | PLA | | | |
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| Total | | | $36.42 | |
