Gas station without pumps

BME 51A W2021 parts and tools

BME 51A will be an at-home lab with Zoom lab sessions, so we need to include more parts and tools in the kit than usual, but we can omit the carrying case.  For those students who want to buy their own carrying case, the one we have used for the past couple of years is https://www.harborfreight.com/19-bin-portable-parts-storage-case-93928.html. Because there are only 2 weeks between the end of Fall quarter and the beginning of Winter quarter, the kits have been broken up into two shipments: one to arrive before the first day of class (Jan 4), the other to arrive during the 3rd week of class.

Parts and tools in the first shipment:

Itemapproximate price per student Current InventoryVendorNotesStatusURL
Bread board (830 points)$2.70Amazon$7.99 for 3https://www.amazon.com/DEYUE-Solderless-Prototype-Breadboard-Points/dp/B07NVWR495
wire stripper (20–30AWG)$4.72Amazonfree shippinghttps://www.amazon.com/gp/product/B005JVJDIA
screwdriver set$5.97Home Depotassumes free shippinghttp://www.homedepot.com/p/Stanley-Precision-Screwdriver-Set-6-Piece-66-052/203713248
soldering iron$4.99Harbor Freighthttps://www.harborfreight.com/electrical/electrician-s-tools/soldering-guns-irons/30-watt-lightweight-soldering-iron-69060.html
Cellulose sponge?
safety glasses$1.75any over-glasses stylehttps://www.magidglove.com/Willson-Polysafe-Safety-Glasses-WPLYSAFpp-WPLYSAFC.aspx
lead-free solder$2.95Jamecohttps://www.jameco.com/z/SOLDERDISPLF-0-031-Inch-Diameter-Rosin-Core-Solder-Tube-99-3-Tin-0-7-Copper_170457.html
solder sucker$2.50Ali Expresshttps://www.aliexpress.com/item/4000283938878.html
SUBTOTAL (tools)$25.58
2 red, 2 black alligator clips$0.68Ali Expressrepackage $54.24 for 35×10 (e-packet)find smaller ones?https://www.aliexpress.com/item/WSFS-Hot-Sale-10-pcs-50mm-Plastic-Handle-Test-Probe-Metal-Alligator-Clips/32389488374.html
5′ each of 6 colors of 22-gauge wire$1.85Jameco
resistor assortment$9.65Ali Express$771.59 with DHL shipping for 80https://www.aliexpress.com/item/32843110803.html
USB A-to-micro 3′$0.90Monoprice$72.19 fo 80https://www.monoprice.com/Product?c_id=103&cp_id=10303&cs_id=1030307&p_id=4867&seq=1&format=2
1×40 male header double length$0.36Ali Express$28.61 with shipping for 4×20https://www.aliexpress.com/item/20PCS-2-54mm-Pin-Header-Connector-1x40P-15mm-Single-Row-Male-Breakable-Same-Length-Golden-Pin/32829781682.html
1×40 male header$0.10Ali Express$7.99 with shippinghttps://www.aliexpress.com/item/100PCS-LOT-40P-2-54mm-Male-Color-Single-Row-Pin-Header/32822331745.html
Teensy LC$11.77PJRC$941.31 for 80https://www.pjrc.com/store/teensylc.html
10kΩ thermistor 1% epoxy NTCLE413E2103F520L$1.24digikey$99 for 100https://www.digikey.com/product-detail/en/NTCLE413E2103F520L/BC2646-ND/2348990
3-pin female header$0.03Ali Express$2.30 for 2×50 (e-packet)https://www.aliexpress.com/item/50PCS-New-Single-Row-1×6-1×5-1×4-1×3-1×2-pins-2-54mm-Female-Header-Straight-Connector/32821638049.html
SUBTOTAL (parts)$26.58
TOTAL$52.16

Also in the first shipment is one loaner item:

Thermometers with calibrate button$13.50https://www.amazon.com/gp/product/B0021AEAG2

In the second shipment:

Itemapproximate price per studentCurrent InventoryVendorNotesURL
flush cutter$1.24Ali Express$98.85 for 80 (DHL shipping)https://www.aliexpress.com/item/33048959489.html
needlenose pliers$1.39Ali Express$110.89 with UPS shipping for 80https://www.aliexpress.com/item/32715447606.html
DT9205A multimeter$6.49Ali Express$519.00 with DHL shipping for 100https://www.aliexpress.com/store/product/DHL-Fedex-100PCS-DT9205A-Digital-Multimeter-Handheld-Multimeter-9205A-Universal-Table/728314_32725751318.html
micrometer$10.90Amazonhttps://www.amazon.com/OMGAI-Standard-Outside-Micrometer-Mechanist/dp/B01M1ELTRW
SUBTOTAL (tools)$20.02
Hysteresis oscillator board$1.00Seeedstudio23.5mm×46.5mm
$18.19 for 40 + ??shipping
https://www.seeedstudio.com/fusion_pcb.html
https://users.soe.ucsc.edu/~karplus/bme51/pc-boards/hysteresis-oscillator-rev0.7/hysteresis-oscillator-rev0_7.zip
Silicone air tubing (16cm, 6″ each)
3/16″ ID
$0.20Amazoncut to 6″ length $8 for 20′https://www.amazon.com/Penn-Plax-Silicone-Flexible-Aquariums/dp/B0002AQ0TS
1/2″ slip/FPT PVC elbow (drilled with 2mm hole)$0.72PVC fittings online$28.90 for 40 with UPS groundhttp://www.pvcfittingsonline.com/407-005-1-2-schedule-40-pvc-90-ell.html
3/16″ barbed fitting 1/2″ MPT (would like 1/8″ barb, but can’t find)$1.39Cole Parmer$55.40 for 4 packs of 10 (UPS ground)
https://www.coleparmer.com/i/mn/3170218
ceramic capacitor assortment$1.75AliExpress$70.07 for 40 (DHL)https://www.aliexpress.com/item/1005001689420759.html
SUBTOTAL (large parts)$5.06
74HC14N$0.44digikey$35 for 100https://www.digikey.com/product-detail/en/texas-instruments/SN74HC14N/296-1577-5-ND/277223
2 MCP6004$0.82digikey$33 for 100https://www.digikey.com/product-detail/en/microchip-technology/MCP6004-I-P/MCP6004-I-P-ND/523060
INA126PA$2.68digikey$214.21 for 80https://www.digikey.com/product-detail/en/texas-instruments/INA126PA/INA126PA-ND/300992
SUBTOTAL (in DIP rail)$3.94
3 1×2 black Lego bricks
(2 drilled with 3mm holes)
$0.18BrickLink250 from US/CAN shipper at $0.04 +$5 shippinghttps://www.bricklink.com/v2/catalog/catalogitem.page?P=3004#T=S&C=11&O={“color”:”11″,”ss”:”US”,”minqty”:”300″}
3 2×4 black LEGO bricks$0.58240 from US/CAN shipper at $0.17 +$5 shippinghttps://www.bricklink.com/v2/catalog/catalogitem.page?P=3001&idColor=11&name=Black%20Brick%202%20x%204&category=%5BBrick%5D#T=S&C=11&O={%22color%22:11,%22minqty%22:%22250%22,%22reg%22:%223%22,%22ca%22:%221%22,%22iconly%22:0}
4-pin 0.1″ pitch screw terminal$0.82digikey$65.63 for 80https://www.digikey.com/product-detail/en/OSTVN04A150/ED10563-ND/1588864
LTR-4206 Phototransistor$0.22digikey$17.50 for 100https://www.digikey.com/product-detail/en/lite-on-inc/LTR-4206/160-1988-ND
3mm MT1403-RG-A red LED (700nm)$0.13digikey$10.35 for 100https://www.digikey.com/product-detail/en/marktech-optoelectronics/MT1403-RG-A/1125-1182-ND/4214617
1N914BTR diode$0.06digikey$4.27 for 100https://www.digikey.com/product-detail/en/fairchild-semiconductor/1N914BTR/1N914BCT-ND/458919
4 each 10 sizes ceramic capacitors (0.1–10µF)$0.65Ali Expresshttps://www.aliexpress.com/item/33011728285.html
SUBTOTAL (small parts)$2.64
2-gallon ziploc bag$0.38Amazon$30.16 for 100https://www.amazon.com/gp/product/B01LTHZOW6
2 2×3 anti-static bags$0.02Amazoncase lot is 1000https://www.amazon.com/Aviditi-PBAS2100-Anti-Static-Reclosable-Poly/dp/B06XPXC4FL
3″ DIP rail$0.07JamecoCut down from 22″ pieceshttp://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_29516_-1
2 DIP rail stops$0.13Jameco$6.50/100https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_29583_-1
SUBTOTAL (packaging)$0.60
TOTAL (parts and tools)$32.26

Loaner items in the second shipment:

Analog Discovery 2
Power supply for AD2$11.02http://www.mouser.com/ProductDetail/Mean-Well/SGA12U05-P1J/
blood pressure cuffs$14.50https://www.bettymills.com/aneroid-sphygmomanometer-pocket-style-hand-held-2-tube-adult-arm-01-776mce
Tee for pressure cuffhttps://www.mcmaster.com/5117K14 or
https://www.mcmaster.com/5117K15
pressure sensors on breakout boards

We did not have enough of the pressure sensors from before (because we can’t share them in lab as usual), so we’ll have to solder up some more. Here are the parts needed for each pressure-sensor board (prices are from 2018, when we last made pressure-sensor boards—I’ve not bothered to update them).

pressure sensors MPX2050DP$9.42https://www.digikey.com/product-detail/en/nxp-usa-inc/MPX2050DP/MPX2050DP-ND/2186536
6.8µF ceramic capacitors (25V or higher)$0.26https://www.digikey.com/product-detail/en/tdk-corporation/FG28X5R1E685KRT06/445-173578-1-ND/5812183
4-pin 0.1″ pitch screw terminal$0.81https://www.digikey.com/product-detail/en/on-shore-technology-inc/OSTVN04A150/ED10563-ND/1588864
custom breakout boards for pressure sensors$1.33Seeedstudio (we may use OSHPark this time, to reduce delivery delays)
2 M3×18mm stainless-steel screws
(M3×20mm would be better)
$0.23https://www.aliexpress.com/item/100pcs-Metric-Thread-M3x18-304-Stainless-Steel-Hex-Socket-Head-Cap-Screw-Bolts/1923077111.html or https://www.mcmaster.com/#91292A029
4 M3 stainless-steel nuts$0.22https://www.aliexpress.com/item/Stainless-steel-Nuts-M3-DIN-934-A2-70-Polished/32457197850.html or https://www.mcmaster.com/#91828A211

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