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Bill of Materials

Overview

The Bill of Materials below specifies components needed for the ventilator. Almost all components can be purchased from Digi-Key or McMaster-Carr. However, if a significantly cheaper vendor was found, other vendors were used. We only selected only parts which had approximately 100 items or more in stock (though most have thousands) and were widely available from several sources.
Total Number of Parts:
56
⁠
unique parts
Tools Required for Construction: Allen key set, Scissors, Soldering Iron
Hours Needed for Construction: ~4 hours
Total Cost:
$893.20
⁠
BOM
0
Type
Source
Component
Part Number
Quantity
Unit Price
Cumulative Price
Link
Electrical
20
Amazon
Raspberry Pi 3 B+
8541589947
1
$42.99
$42.99
https://www.amazon.com/ELEMENT-Element14-Raspberry-Pi-Motherboard/dp/B07P4LSDYV/ref=sr_1_4?dchild=1&keywords=raspberry+pi+3b&qid=1591244155&sr=8-4
Automation Direct
Stepper Motor with Encoder
STP-MTR-23079E
1
$123.00
$123.00
⁠
https://www.automationdirect.com/adc/shopping/catalog/motion_control/stepper_systems/dual_shaft_and_encoder_stepper_motors/stp-mtr-23079e
⁠
⁠
Automation Direct
Encoder Cable
STP-CBL-EB3
1
$24.50
$24.50
⁠
https://www.automationdirect.com/adc/shopping/catalog/cables/encoders/stp-cbl-eb3
⁠
⁠
Digi-Key
Stepper Motor Controller
2183-3140-ND
1
$51.95
$51.95
⁠
https://www.digikey.com/product-detail/en/pololu-corporation/3140/2183-3140-ND/11586875
⁠
⁠
Digi-Key
Power Switch
360-1897-ND‎
1
$8.85
$8.85
⁠
https://www.digikey.com/product-detail/en/nkk-switches/S301T/360-1897-ND/1006975
⁠
⁠
Amazon
Alarm
OD2017101304UP
1
$8.59
$8.59
⁠
https://www.amazon.com/OdiySurveil-30x15mm-Active-Electronic-Buzzer/dp/B076FVGT1C/ref=zg_bs_306824011_5?_encoding=UTF8&psc=1&refRID=1RVG81RTZBZ795MHP2NM
⁠
⁠
Maker Store USA
Limit Switches and Brackets
US-ELEC-MICRO-KIT
2
$4.45
$8.90
⁠
https://makerstore.cc/product/micro-limit-switch-kit-with-mounting-plate/
⁠
⁠
Digi-Key
Pressure Transducer
480-3640-ND
1
$20.92
$20.92
⁠
https://www.digikey.com/product-detail/en/honeywell-sensing-and-productivity-solutions/NSCDRRN001PDUNV/480-3640-ND/2683900
⁠
⁠
Amazon
12V Power Supply
N/A
1
$11.49
$11.49
⁠
https://www.amazon.com/dp/B07RDHH3L5/ref=dp_cerb_1
⁠
⁠
Digi-Key
Raspberry Pi Touchscreen, 7"
1690-1007-ND‎
1
$79.00
$79.00
⁠
https://www.newark.com/raspberry-pi/raspberrypi-display/display-7-touch-screen-rpi-sbc/dp/49Y1712
⁠
⁠
Digi-Key
Raspberry Pi and Screen Enclosure
1690-1008-ND
1
$17.00
$17.00
⁠
https://www.digikey.com/product-detail/en/okdo/ASM-1900035-21/1690-1008-ND/6152807
⁠
⁠
Amazon
Pi-EzConnect Terminal Block Breakout HAT
2711
1
$19.95
$19.95
⁠
https://www.adafruit.com/product/2711
⁠
⁠
Amazon
Power Splitter
​
1
$5.68
$5.68
⁠
https://www.amazon.com/gp/product/B000234UFG/ref=ox_sc_act_title_1?smid=A3VZC5G7U3OWU4&psc=1
⁠
⁠
Amazon
18AWG Wire 5ft for 12V power
​
1
$5.98
$5.98
⁠
https://www.amazon.com/gp/product/B01708AYYQ/ref=ox_sc_act_title_2?smid=AITZO53LNBA1K&psc=1
⁠
⁠
Amazon
SanDisk 16GB MicroSD Memory Card
​
1
$6.99
$6.99
⁠
https://www.amazon.com/gp/product/B073K14CVB/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1
⁠
⁠
RobotShop
4-Channel 16-Bit ADC for Raspberry Pi (ADS1115)
ADS1115
1
$10.95
$10.95
https://www.robotshop.com/en/seeedstudio-4-channel-16-bit-adc-raspberry-pi-ads1115.html?gclid=EAIaIQobChMI0KWz1til6QIVTr7ACh04Tgu2EAQYASABEgJhPvD_BwE
Amazon
12V to USB-C Raspberry Pi Power Source (USB A to miro USB)
765756931250
1
$10.99
$10.99
⁠
https://www.amazon.com/Raspberry-Fuente-alimentaci%C3%B3n-2-5A-Micro/dp/B0852J262G/ref=sr_1_2_sspa?dchild=1&keywords=raspberry+pi+power+supply&qid=1591069222&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExN1NXM1ZWV0U4RU9aJmVuY3J5cHRlZElkPUEwODk5NDc2MktCVzZKTVQ5RUNMSyZlbmNyeXB0ZWRBZElkPUEwMTY0NDA4MkI0VUlFSldBTUc5TiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
⁠
⁠
Amazon
USB Left Angle A Male to Female L Connector
​
1
$6.99
$6.99
⁠
https://www.amazon.com/UCEC-USB-2-0-Extension-Cable/dp/B00W9BAAU8/ref=sr_1_9?dchild=1&keywords=usb+a+l+connector+male+male&qid=1591065247&sr=8-9
⁠
⁠
Amazon
USB A 24W Wall Charger
​
1
$12.99
$12.99
https://www.amazon.com/Anker-Charger-PowerPort-PowerIQ-Foldable/dp/B072HHW3GK/ref=sr_1_14?dchild=1&keywords=usb+a+power+brick&qid=1591065285&sr=8-14
Amazon
USB Micro USB to USB A L connector
​
1
$7.99
$7.99
https://www.amazon.com/RAYSUN-Packs-Degree-Micro-Male/dp/B00WMF7JUA/ref=sr_1_6?dchild=1&keywords=usb+a+l+connector+to+micro+usb&qid=1591065143&sr=8-6
$485.70
Sum
Mechanical
32
8020
80/20 (1010) Extrusion 4"
1010
5
$2.87
$14.35
⁠
https://8020.net/1010.html
⁠
⁠
8020
80/20 (1010) Extrusion 15.5"
1010
4
$5.52
$22.08
​
8020
80/20 (1010) Extrusion 12"
1010
8
$4.71
$37.68
⁠
https://www.mcmaster.com/catalog/126/2052
⁠
⁠
8020
80/20 (1020) Extrusion 10.5"
1020
1
$6.05
$6.05
⁠
https://www.mcmaster.com/catalog/126/2052
⁠
⁠
McMaster-Carr
Pivot for Double 80/20 Rail
47065T192
1
$22.25
$22.25
⁠
https://www.mcmaster.com/catalog/126/2055
⁠
⁠
Digi-Key
L Bracket
36-4337-ND
100
$0.20
$19.77
⁠
https://www.digikey.com/product-detail/en/keystone-electronics/4337/36-4337-ND/306919
⁠
⁠
McMaster-Carr
Door Handle
14895A42
2
$2.05
$4.10
⁠
https://www.mcmaster.com/catalog/126/3108
⁠
⁠
8020
80/20 1/4"-20 Button Head Screw 0.500" and T-Nut
3393
25
$0.40
$10.00
⁠
https://8020.net/3393.html
⁠
⁠
8020
80/20 #10-32 T-Nut
3276
100
$0.16
$16.00
⁠
https://8020.net/13122.html
⁠
⁠
8020
#10-32 Button Head Screw 0.375"
3042
100
$0.19
$19.00
⁠
https://8020.net/3042.html
⁠
⁠
8020
80/20 #8-32 Button Head Screw 0.375" and T-Nut
3483
15
$0.35
$5.25
⁠
https://8020.net/3483html
⁠
⁠
McMaster-Carr
3" Extension Spring, 4.8lb-in (QTY 3)
3114T94
1
$7.87
$7.87
https://www.mcmaster.com/3114t94
McMaster-Carr
#8-32 Flared Knurled Thumb Screw
94567A330
4
$2.24
$8.96
⁠
https://www.mcmaster.com/catalog/126/3264
⁠
⁠
8020
T-Slot Plastic Handles (2062)
2062
2
$4.20
$8.40
⁠
https://www.mcmaster.com/catalog/126/2058
⁠
⁠
8020
6' T-Slot Antislip Cover
2828
5
$1.15
$5.75
⁠
https://8020.net/2828.html
⁠
⁠
McMaster-Carr
U-Bolt with Mounting Plate 3.5" C-C
3043T86
2
$4.33
$8.66
⁠
https://www.mcmaster.com/catalog/126/1694
⁠
⁠
McMaster-Carr
1/2" ID Routing Clamp QTY 50
9434T17
1
$5.77
$5.77
⁠
https://www.mcmaster.com/catalog/126/1684
⁠
⁠
Amazon
NEMA 23 Steel LBracket QTY 4
Nema17-Mount
1
$11.99
$11.99
https://www.amazon.com/Stepper-Motor-Mounting-Bracket-Screws/dp/B073V77VLD
McMaster-Carr
22T XL Acetal Timing Pulley
57105K21
1
$8.59
$8.59
⁠
https://www.mcmaster.com/catalog/126/1197
⁠
⁠
McMaster-Carr
Steel Eyebolt with Shoulder - for Lifting
3014T45
2
$3.21
$6.42
⁠
https://www.mcmaster.com/3014t45
⁠
⁠
McMaster-Carr
8" Zip Tie QTY 100
80005K11
1
$6.00
$6.00
⁠
https://www.mcmaster.com/80005k11
⁠
⁠
McMaster-Carr
Power Switch Mounting Bracket
55205K21
1
$7.14
$7.14
https://www.mcmaster.com/55205K21
McMaster-Carr
T-Slotted Framing
47065T547
1
$16.06
$16.06
https://www.mcmaster.com/47065t547-47065T547
Amazon
1.9mm 550lb Braided Spectra(R) Speargun Reel Line
B00NJQ8IDS
1
$11.99
$11.99
⁠
https://www.amazon.com/Feet-550lb-Braided-Spectra-Speargun/dp/B005URJ644/ref=sr_1_2?ie=UTF8&qid=1459538189&sr=8-2&keywords=spectra%2Bspearfishing%2Bline&th=1
⁠
⁠
AndyMark
24T HTD Pulley, 1/2 in. Hex Bore
am-3403
1
$9.00
$9.00
⁠
https://www.andymark.com/products/24t-htd-pulley-1-2-in-hex-bore?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6Ok5hdmlnYXRpb246OlNlYXJjaFJlc3VsdHMvJTdCJTIyYnV0dG9uJTIyJTNBJTIyc2VhcmNoJTIyJTJDJTIycSUyMiUzQSUyMjI0K3B1bGxleSUyMiUyQyUyMnV0ZjglMjIlM0ElMjIlRTIlOUMlOTMlMjIlN0Q
⁠
⁠
AndyMark
PG Mounting Bracket
am-2197
1
$8.00
$8.00
⁠
https://www.andymark.com/products/pg-series-mounting-bracket
⁠
⁠
McMaster-Carr
Black-Oxide Alloy Steel Socket Head Screw
3-48 Thread Size, 1/2" Long (Pack of 100)
91251A096
1
$6.90
$6.90
⁠
https://www.mcmaster.com/91251A096
⁠
⁠
McMaster-Carr
Low-Strength Steel Hex Nut
Zinc-Plated, 3-48 Thread Size
(Pack of 100)
90480A004
1
$1.33
$1.33
⁠
https://www.mcmaster.com/90480A004
⁠
⁠
8020
10 & 25 Series 4 Hole - Standard Stainless Steel Hinge (Hinge for better quality of life)
12094
1
$18.90
$18.90
⁠
https://8020.net/12094.html
⁠
⁠
8020
Bolt Assembly: SS 1/4-20 x .500" FHSCS and Roll-In T-Nut with Flex Handle (for hinge)
⁠
https://8020.net/3639.html
⁠
⁠
4
$2.90
$11.60
⁠
https://8020.net/3639.html
⁠
⁠
AndyMark
Hex Collar Clamp
am-2871
1
$8.25
$8.25
https://www.andymark.com/products/1-2-in-hex-bore-2-piece-collar-clamp?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6Ok5hdmlnYXRpb246OlNlYXJjaFJlc3VsdHMvJTdCJTIyYnV0dG9uJTIyJTNBJTIyc2VhcmNoJTIyJTJDJTIycSUyMiUzQSUyMmNvbGxhcitjbGFtcCUyMiUyQyUyMnV0ZjglMjIlM0ElMjIlRTIlOUMlOTMlMjIlN0Q
Amazon
Double Sided Tape
​
1
$7.99
$7.99
⁠
https://www.amazon.com/gp/product/B07R8TYSTX/ref=ox_sc_act_title_1?smid=A3GXTQQIYFAW4P&psc=1
⁠
⁠
$362.10
Sum
Plumbing
3
AED Superstore
Ambu Bag with PEEP valve
​
1
$23.96
$23.96
⁠
https://www.aedsuperstore.com/ambu-bag-spur-ii-adult-resuscitator-with-adult-mask-and-oxygen-reservoir-peep-valve-bvm.html
⁠
⁠
Amazon
Extension tube
​
1
$12.75
$12.75
⁠
https://www.amazon.com/Sunset-18-inch-Cpap-Tubing/dp/B076P1PXHN/ref=sr_1_8?dchild=1&keywords=22mm+tubing&qid=1589766752&s=hpc&sr=1-8
⁠
⁠
Amazon
Sensing Tube
​
1
$8.69
$8.69
⁠
https://www.amazon.com/Lees-Airline-Tubing-6-Foot-Connectors/dp/B0002APXO6/ref=sr_1_3?dchild=1&keywords=mini+aquarium+tubing&qid=1589771359&s=pet-supplies&sr=1-3
⁠
⁠
$45.40
Sum
Testing Equipment
1
Amazon
Model Lungs
​
1
$199.00
$199.00
⁠
https://www.amazon.com/Adult-Biomedical-Ventilator-Testing-Demonstration/dp/B0767RBQ1H/ref=sr_1_1?dchild=1&keywords=lung+testing&qid=1588480940&sr=8-1
⁠
⁠
$199.00
Sum
56
Count
$1,092.20
Sum
⁠
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