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REV_G BOM
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http://pvos.org/co2/g
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option A
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itemcost
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pcb$3.00
https://oshpark.com/shared_projects/B5Xvlckj
1$3.00
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headers$2.001$2.00
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resistors$0.301$0.30
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adafruit feather esp32$20.00
https://www.adafruit.com/product/3405
1$20.00
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oled$5.00
https://www.amazon.com/Display-Module-SSD1306-Du-pont-Arduino/dp/B07VDXYDVY/ref=pd_lpo_147_t_2/143-7776285-8256848?_encoding=UTF8&pd_rd_i=B07VDXYDVY&pd_rd_r=f6be1755-36b0-4025-abe0-eba821793e45&pd_rd_w=ZEiB7&pd_rd_wg=qGYwv&pf_rd_p=16b28406-aa34-451d-8a2e-b3930ada000c&pf_rd_r=RZQC9W5WJJ7W06QAY8G5&psc=1&refRID=RZQC9W5WJJ7W06QAY8G5
1$5.00
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scd30$54.00
https://www.digikey.com/en/products/detail/sensirion-ag/SCD30/8445334
1$54.00
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400 mAh battery for feather$8.00
https://www.adafruit.com/product/3898?gclid=Cj0KCQiAgomBBhDXARIsAFNyUqPyjI3mHwlbXlfBfZRjRRI7Rhq0j3CQxQyaEw4qRuSKLcfAbox1jB0aAsXaEALw_wcB
1$8.00
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buttons$0.10
https://www.adafruit.com/product/367?gclid=Cj0KCQiAgomBBhDXARIsAFNyUqNerF9ZcwXrawCAzN_TIsYFtUH3QmG7OdnhV_3Gu2kMxcEenw9B1q8aAnzUEALw_wcB
1$0.10
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5V 2.5A usb wall / cable$5.00
https://www.amazon.com/AmazonBasics-One-Port-USB-Wall-Charger/dp/B0773JFWDC/ref=sr_1_1_sspa?dchild=1&keywords=usb+5v+wall+charger&qid=1611605407&s=electronics&sr=1-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyRFU1RE1LR0lYNkZWJmVuY3J5cHRlZElkPUEwNTQwMDM1MlFGSlQ1RFlLR0hHNiZlbmNyeXB0ZWRBZElkPUEwNTk2MDI5MlI1R0hISFlGR0sxUCZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
1$5.00
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down' angle microUSB cable$6
https://www.amazon.com/gp/product/B00ENZDFQ4/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
1$6
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case$7
https://www.digikey.com/en/products/detail/hammond-manufacturing/1591BTCL/1090769
1$7
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bmp388$10.00
https://www.adafruit.com/product/3966
0$0.00
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max4666$5.00
https://www.adafruit.com/product/1063
0$0.00
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Hirose microSD$2.00
https://www.digikey.com/en/products/detail/hirose-electric-co-ltd/DM3D-SF/1786510
1$2.00
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Adafruit microSD breakout$8.00
https://www.adafruit.com/product/254
0$0.00
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RFM95 module$14
https://www.digikey.com/en/products/detail/rf-solutions/RFM95W-915S2/6564923
1$14
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total cost$126.80
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