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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
Type
Source
Component
Part Number
Quantity
Unit Price
Cumulative Price
Link
Electrical
20
Raspberry Pi 3 B+
8541589947
1
$42.99
$42.99
Stepper Motor with Encoder
STP-MTR-23079E
1
$123.00
$123.00
Encoder Cable
STP-CBL-EB3
1
$24.50
$24.50
Stepper Motor Controller
2183-3140-ND
1
$51.95
$51.95
Power Switch
360-1897-ND‎
1
$8.85
$8.85
Alarm
OD2017101304UP
1
$8.59
$8.59
Limit Switches and Brackets
US-ELEC-MICRO-KIT
2
$4.45
$8.90
Pressure Transducer
480-3640-ND
1
$20.92
$20.92
12V Power Supply
N/A
1
$11.49
$11.49
Raspberry Pi Touchscreen, 7"
1690-1007-ND‎
1
$79.00
$79.00
Raspberry Pi and Screen Enclosure
1690-1008-ND
1
$17.00
$17.00
Pi-EzConnect Terminal Block Breakout HAT
2711
1
$19.95
$19.95
Power Splitter
​
1
$5.68
$5.68
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
⁠
⁠
SanDisk 16GB MicroSD Memory Card
​
1
$6.99
$6.99
4-Channel 16-Bit ADC for Raspberry Pi (ADS1115)
ADS1115
1
$10.95
$10.95
12V to USB-C Raspberry Pi Power Source (USB A to miro USB)
765756931250
1
$10.99
$10.99
USB Left Angle A Male to Female L Connector
​
1
$6.99
$6.99
USB A 24W Wall Charger
​
1
$12.99
$12.99
USB Micro USB to USB A L connector
​
1
$7.99
$7.99
Mechanical
32
80/20 (1010) Extrusion 4"
1010
5
$2.87
$14.35
80/20 (1010) Extrusion 15.5"
1010
4
$5.52
$22.08
​
80/20 (1010) Extrusion 12"
1010
8
$4.71
$37.68
80/20 (1020) Extrusion 10.5"
1020
1
$6.05
$6.05
Pivot for Double 80/20 Rail
47065T192
1
$22.25
$22.25
L Bracket
36-4337-ND
100
$0.20
$19.77
Door Handle
14895A42
2
$2.05
$4.10
80/20 1/4"-20 Button Head Screw 0.500" and T-Nut
3393
25
$0.40
$10.00
80/20 #10-32 T-Nut
3276
100
$0.16
$16.00
#10-32 Button Head Screw 0.375"
3042
100
$0.19
$19.00
80/20 #8-32 Button Head Screw 0.375" and T-Nut
3483
15
$0.35
$5.25
3" Extension Spring, 4.8lb-in (QTY 3)
3114T94
1
$7.87
$7.87
#8-32 Flared Knurled Thumb Screw
94567A330
4
$2.24
$8.96
T-Slot Plastic Handles (2062)
2062
2
$4.20
$8.40
6' T-Slot Antislip Cover
2828
5
$1.15
$5.75
U-Bolt with Mounting Plate 3.5" C-C
3043T86
2
$4.33
$8.66
1/2" ID Routing Clamp QTY 50
9434T17
1
$5.77
$5.77
NEMA 23 Steel LBracket QTY 4
Nema17-Mount
1
$11.99
$11.99
22T XL Acetal Timing Pulley
57105K21
1
$8.59
$8.59
Steel Eyebolt with Shoulder - for Lifting
3014T45
2
$3.21
$6.42
8" Zip Tie QTY 100
80005K11
1
$6.00
$6.00
Power Switch Mounting Bracket
55205K21
1
$7.14
$7.14
T-Slotted Framing
​
47065T547
1
$16.06
$16.06
1.9mm 550lb Braided Spectra(R) Speargun Reel Line
B00NJQ8IDS
1
$11.99
$11.99
24T HTD Pulley, 1/2 in. Hex Bore
am-3403
1
$9.00
$9.00
PG Mounting Bracket
am-2197
1
$8.00
$8.00
Black-Oxide Alloy Steel Socket Head Screw
3-48 Thread Size, 1/2" Long (Pack of 100)
91251A096
1
$6.90
$6.90
Low-Strength Steel Hex Nut
Zinc-Plated, 3-48 Thread Size
(Pack of 100)
90480A004
1
$1.33
$1.33
10 & 25 Series 4 Hole - Standard Stainless Steel Hinge (Hinge for better quality of life)
12094
1
$18.90
$18.90
Bolt Assembly: SS 1/4-20 x .500" FHSCS and Roll-In T-Nut with Flex Handle (for hinge)
4
$2.90
$11.60
Hex Collar Clamp
am-2871
1
$8.25
$8.25
Double Sided Tape
​
1
$7.99
$7.99
Plumbing
3
Testing Equipment
1
⁠
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