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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

BOM

Type

Source

Component

Part Number

Quantity

Unit Price

Cumulative Price

Link

Electrical

Amazon

Raspberry Pi 3 B+

8541589947

$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

$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

$24.50

⁠

https://www.automationdirect.com/adc/shopping/catalog/cables/encoders/stp-cbl-eb3

⁠

Digi-Key

Stepper Motor Controller

2183-3140-ND

$51.95

⁠

https://www.digikey.com/product-detail/en/pololu-corporation/3140/2183-3140-ND/11586875

⁠

Digi-Key

Power Switch

360-1897-ND‎

$8.85

⁠

https://www.digikey.com/product-detail/en/nkk-switches/S301T/360-1897-ND/1006975

⁠

Amazon

Alarm

OD2017101304UP

$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

$4.45

$8.90

⁠

https://makerstore.cc/product/micro-limit-switch-kit-with-mounting-plate/

⁠

Digi-Key

Pressure Transducer

480-3640-ND

$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

$11.49

⁠

https://www.amazon.com/dp/B07RDHH3L5/ref=dp_cerb_1

⁠

Digi-Key

Raspberry Pi Touchscreen, 7"

1690-1007-ND‎

$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

$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

$19.95

⁠

https://www.adafruit.com/product/2711

⁠

Amazon

Power Splitter

$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

$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

$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

$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

$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

$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

$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

$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

8020

80/20 (1010) Extrusion 4"

1010

$2.87

$14.35

⁠

https://8020.net/1010.html

⁠

8020

80/20 (1010) Extrusion 15.5"

1010

$5.52

$22.08

8020

80/20 (1010) Extrusion 12"

1010

$4.71

$37.68

⁠

https://www.mcmaster.com/catalog/126/2052

⁠

8020

80/20 (1020) Extrusion 10.5"

1020

$6.05

⁠

https://www.mcmaster.com/catalog/126/2052

⁠

McMaster-Carr

Pivot for Double 80/20 Rail

47065T192

$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

$2.05

$4.10

⁠

https://www.mcmaster.com/catalog/126/3108

⁠

8020

80/20 1/4"-20 Button Head Screw 0.500" and T-Nut

3393

$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

$0.35

$5.25

⁠

https://8020.net/3483html

⁠

McMaster-Carr

3" Extension Spring, 4.8lb-in (QTY 3)

3114T94

$7.87

https://www.mcmaster.com/3114t94

McMaster-Carr

#8-32 Flared Knurled Thumb Screw

94567A330

$2.24

$8.96

⁠

https://www.mcmaster.com/catalog/126/3264

⁠

8020

T-Slot Plastic Handles (2062)

2062

$4.20

$8.40

⁠

https://www.mcmaster.com/catalog/126/2058

⁠

8020

6' T-Slot Antislip Cover

2828

$1.15

$5.75

⁠

https://8020.net/2828.html

⁠

McMaster-Carr

U-Bolt with Mounting Plate 3.5" C-C

3043T86

$4.33

$8.66

⁠

https://www.mcmaster.com/catalog/126/1694

⁠

McMaster-Carr

1/2" ID Routing Clamp QTY 50

9434T17

$5.77

⁠

https://www.mcmaster.com/catalog/126/1684

⁠

Amazon

NEMA 23 Steel LBracket QTY 4

Nema17-Mount

$11.99

https://www.amazon.com/Stepper-Motor-Mounting-Bracket-Screws/dp/B073V77VLD

McMaster-Carr

22T XL Acetal Timing Pulley

57105K21

$8.59

⁠

https://www.mcmaster.com/catalog/126/1197

⁠

McMaster-Carr

Steel Eyebolt with Shoulder - for Lifting

3014T45

$3.21

$6.42

⁠

https://www.mcmaster.com/3014t45

⁠

McMaster-Carr

8" Zip Tie QTY 100

80005K11

$6.00

⁠

https://www.mcmaster.com/80005k11

⁠

McMaster-Carr

Power Switch Mounting Bracket

55205K21

$7.14

https://www.mcmaster.com/55205K21

McMaster-Carr

T-Slotted Framing

47065T547

$16.06

https://www.mcmaster.com/47065t547-47065T547

Amazon

1.9mm 550lb Braided Spectra(R) Speargun Reel Line

B00NJQ8IDS

$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

$9.00

⁠

https://www.andymark.com/products/24t-htd-pulley-1-2-in-hex-bore?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6Ok5hdmlnYXRpb246OlNlYXJjaFJlc3VsdHMvJTdCJTIyYnV0dG9uJTIyJTNBJTIyc2VhcmNoJTIyJTJDJTIycSUyMiUzQSUyMjI0K3B1bGxleSUyMiUyQyUyMnV0ZjglMjIlM0ElMjIlRTIlOUMlOTMlMjIlN0Q

⁠

AndyMark

PG Mounting Bracket

am-2197

$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

$6.90

⁠

https://www.mcmaster.com/91251A096

⁠

McMaster-Carr

Low-Strength Steel Hex Nut

Zinc-Plated, 3-48 Thread Size

(Pack of 100)

90480A004

$1.33

⁠

https://www.mcmaster.com/90480A004

⁠

8020

10 & 25 Series 4 Hole - Standard Stainless Steel Hinge (Hinge for better quality of life)

12094

$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

⁠

$2.90

$11.60

⁠

https://8020.net/3639.html

⁠

AndyMark

Hex Collar Clamp

am-2871

$8.25

https://www.andymark.com/products/1-2-in-hex-bore-2-piece-collar-clamp?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6Ok5hdmlnYXRpb246OlNlYXJjaFJlc3VsdHMvJTdCJTIyYnV0dG9uJTIyJTNBJTIyc2VhcmNoJTIyJTJDJTIycSUyMiUzQSUyMmNvbGxhcitjbGFtcCUyMiUyQyUyMnV0ZjglMjIlM0ElMjIlRTIlOUMlOTMlMjIlN0Q

Amazon

Double Sided Tape

$7.99

⁠

https://www.amazon.com/gp/product/B07R8TYSTX/ref=ox_sc_act_title_1?smid=A3GXTQQIYFAW4P&psc=1

⁠

$362.10

Sum

Plumbing

AED Superstore

Ambu Bag with PEEP valve

$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

$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

$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

Amazon

Model Lungs

$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

$1,092.20

Sum

⁠

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