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BOM Part NumberKS-2022-KitComplete
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BOM NameKS-2022-KitComplete
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Date10 Jul 2022; 20:04:24 GMT
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Last update by userdavid_h_brown@uri.edu
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Created by userdavid_h_brown@uri.edu
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RevisionLatest
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LevelPart NumberQuantityDescription
Sample Image
Supplier LinkManufacturer Name
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1KS-2022-BucketTop1
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1.1FFF-UBoltPadInsideLower20221Specific to 3.5g Letica bucket used in 2022
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1.2FFF-UBoltPadInsideUpper20221Specific to 3.5g Letica bucket used in 2022
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1.3FFF-UBoltPadOutsideLower20221Specific to 3.5g Letica bucket used in 2022
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1.4FFF-UBoltPadOutsideUpper20221Specific to 3.5g Letica bucket used in 2022
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1.5LS-BucketLid-20221EZ-Peel lid with 3 pieces of mounting tape pre-attached
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1.5.1ASM-CleanAlcohol2Clean part with isopropyl alcohol, lint-free cloth (based on 2 min)
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1.5.2ASM-TapeApply7Cut and apply tape
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1.5.3Bucket-5g-lid-easy13.5/5-gallon "easy-peel" lid
ULineLetica
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1.5.4TAPE-Mounting-1"x3"3Cut piece of, e.g., 3M Scotch 411 Permanent Double Sided Outdoor Mounting Tape with backing on one side. (Kit packaging: on bucket lid.) May substitute 3m Scotch 414 Permanent Double Sided Extreme Mounting Tape.
Home Depot
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1.5.5TAPE-Strong-1"x2"2E.g., Gorilla tape. (Kit packaging: on bucket lid)
AmazonGorilla
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1.5.6TAPE-Strong-1"x6"2E.g., Gorilla tape. (Kit packaging: on bucket lid)
AmazonGorilla
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1.6LS-BucketTop-20221Drilled and with stickers
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1.6.1ASM-BucketTopMountingHoles1Drill mounting holes and power cable hole using 3D-printed template
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1.6.2ASM-CleanAlcohol1Clean part with isopropyl alcohol, lint-free cloth (based on 2 min)
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1.6.3ASM-DRILL-Plastic2Drill a hole in a plastic part (no clamp required)
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1.6.4ASM-LabelApply3Clean surface with alcohol and apply label
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1.6.5Bucket-3.5g13.5 gallon bucket used in 2022 design. Make sure to include shipping in cost!
ULineLetica
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1.6.6LBL-LaserWarningBucket1Adhesive warning label for bucket. 6" by 4.5" print on UV-resistant vinyl. Pricing based on quantity=150
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1.7PVC-1"x3.75"11" Schedule 40 PVC pipe, 3.75" cut section. Price based on $0.85 for pipe and $0.50 to cut (2022 design)
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1.8RadiantBarrier-12x121~12" square (or ~0.3m square) piece of radiant barrier a.k.a. "bubble foil" insulation
Home DepotReflectix (or similar)
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1.9UBOLT-1/4"x1"Pipe21/4"-20 x 1" Pipe Size; 2-3/4" long Hot Dipped Galvanized Low Carbon Steel U-Bolt. Should come with 2 nuts and a plate. If no plate, substitute 2 fender washers?
McMaster
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2KS-2022-Drive1Includes main board
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2.1BUSHING-No10x05in8Extreme-temperature Vibration-damp bushing, 0.5" diameter for No 10 screw
McMaster
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2.2CA-SlipRing-2020112-conductor through-hole slip ring; 8 conductors used with JST plug on stator side
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2.2.1ASM-Additional3Complexity of task requires additional time
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2.2.2CRIMP-DUPONT3Crimp 1 Dupont/Harwin/Futaba pin, including stripping and trimming wire
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2.2.3CRIMP-JST13Crimp 1 JST pin, including stripping and trimming wire
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2.2.4FUT-J-Conn-Clr1Futaba J Servo Connector Housing - Clear
Hansen Hobbies
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2.2.5FUT-J-Pin3Gold Male Terminals for .100" Rectangular Housings and Universal & Futaba J Servo Connectors. Very possible that these may be equivalent to the DP-M Dupont/Harwin pins, but the tiny wings near the pin tip are splayed rather than folded up.
Hansen Hobbies
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2.2.6FUT-J-Sleve-Clr1Futaba J Servo Connector Male Sleeve - Clear
Hansen Hobbies
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2.2.7H0522-12S112-conductor through-hole slip ring (5mm hole, 22mm OD). Amazon may have some at https://www.amazon.com/dp/B07WK5SHLR/ref=twister_B07WTTGBF1
senring
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2.2.8JST-SMR-02V-B12-pole JST SM connector receptacle housing with arm lock. Use 2x JST-SYM-001T-P0.6 pin
JST
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2.2.9JST-SYM-001T-P0.62JST SM connector pin contact SYM-001T-P0.6 (N)
JST
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2.2.10JST-XH-PLUG-31JST XH plug housing, 3-circuit, model no XHP-3
JST
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2.2.11JST-XH-PLUG-81JST XH plug housing, 8-circuit, model no XHP-8
JST
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2.2.12JST-XH-SOCKET11JST XH crimp connector (sockets only; pins are in headers), model no SXH-001T-P0.6
JST
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2.2.13SLEEVE-small-10cm1~10cm of 3mm or 1/8" PET expandable braided sleeving cut to 10cm length with hot knife while expanded on 1/4" dowel. Usable length on 12 conductor slip ring will be around 12cm and original unexpanded length will be around 15cm. Base cost of $0.17 increased to account for cut time. Picture shows dowel used to cut as well as sample part.
Amazon
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2.2.14TEST-Continuity4Test basic connections of a cable assembly or circuit board with a multimeter PER MINUTE
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2.2.15TWIST-Wire4Twist up to 4 10- to 20-cm wires together
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2.2.16ZIPTIE-4in0Small 4-inch-long (100mm) self-locking nylon cable tie. Usually about 1/10" wide.
Amazon
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2.3Coupler5mm5mm15mm to 5mm rigid aluminum coupler. Insert M3x4mm grub screws (typically included) in each hole to ensure quality of thread tap. Also confirm diameter of bore (got one that was 5mm on one end but maybe 8 on the other).
UxcellLots of places make and sell these. Typically come with set screws. (Had bad experience with poorly made brass ones with a dumbbell shape.)
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2.4FFF-SlipRingHolder20221Slip ring holder for direct drive. PCB support pad height and groove under feet are specific to Letica 3.5g bucket used in 2022
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2.5LS-BucketBottom-20221Drilled and with stickers
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2.5.1ASM-BucketBottomCut1Snip center bump of bucket; drill 2mm hole; mount to jig, cut with table saw
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2.5.2ASM-BucketBottomHoleSaw2Drill out bucket bottom to remove ridge and clear shaft
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2.5.3ASM-BucketBottomMarkHoles1Mark holes in bottom of bucket: position nail punch in center hole; fit on base; hammer through
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2.5.4ASM-CleanAlcohol1Clean part with isopropyl alcohol, lint-free cloth (based on 2 min)
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2.5.5ASM-LabelApply2Clean surface with alcohol and apply label
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2.5.6LBL-IdentCert1FDA CDRH-required identification and certification label
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2.5.7LBL-SerialNumber1Includes setup cost for series run
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2.6LS-Mainboard-20221Assembled with programmed microcontroller, set A4988, jumper, and bumpers
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2.6.1ASM-InsertPart4Insert a part
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2.6.2ASM-TapeApply5Cut and apply tape
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2.6.3ASM-Test5Test a part by checking its fit, using a cable tester, etc (per minute)
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2.6.4BUMPER-0.5in4Adhesive-Back Bumpers, Polyurethane Rubber,
1/2" OD, 9/64" High, Durometer 50A, Clear
McMaster
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2.6.5CONN-Jumper2541Jumper, 2.54mm (0.1") shunt
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2.6.6Heatsink-6mm1Tiny (0.25" square) self-adhesive heat sink. 6mm currently unavailable (summer '20); showing 8.8mm substitute. Another option uses an adhesive.
Amazon
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2.6.7MA-A4988-0.67A1Set to vREF of about 0.364V => 0.67A current... works okay for short 1A stepper 17HS08-1004S in direct drive
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2.6.7.1ADJ-A49881Adjust stepper current limit using Vref on Pololu board
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2.6.7.2MOD-A49881A4988 stepper driver carrier. Pololu's design is preferred as it allows easy setting of current. Link is to "bulk" (min 5) order with pins already soldered on.
PololuPololu
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2.6.8MA-ESP32-2022_Kit1
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2.6.8.1MOD-ESP32-DEVKITC-VIE1Espressif
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2.6.8.2PROGRAM-Arduino1Program an Arduino with the appropriate software
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2.6.9PCB-Main20221Main board for 2022 kits. Includes all parts, SMT and through-hole
JLCPCB
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2.7LS-MotorMount-20221Motor stand with bridge layer removed and nylock nuts inserted
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2.7.1ASM-InsertPart4Insert a part
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2.7.2ASM-ReamFFF4Ream out a hole in a 3D-printed part
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2.7.3FFF-MotorStand20221Motor stand for direct drive with integrated key switch holder
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2.7.4NUT-10-32-NylonInsert4Nylon-insert locknut, 10-32 thread, stainless preferred
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2.8MA-17HS08-1004S1Short stepper motor with conductors trimmed to 8" (200mm) for 2020 kits and 4" (100mm) for 2022 kits. Dupont/Harwin connector added with wire sequence Green, Black, Red, Blue.
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2.8.117HS08-1004S1Short Height Bipolar Nema 17 stepper. Comes *without* connector! Sample quantities may be available from Amazon: https://smile.amazon.com/Short-Bipolar-Motor-18-4oz-13Ncm/dp/B00PNEQ79Q
StepperOnlineStepperOnline
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2.8.2CRIMP-DUPONT4Crimp 1 Dupont/Harwin/Futaba pin, including stripping and trimming wire
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2.8.3DP-F4Dupont crimp socket ("female"); supplied on metal tape
Amazon
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2.8.4DP-H41Dupont housing/shell, 4-position
Amazon
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2.9SCREW-#10-32x0.8754Pan head Phillips screw, 10-32 thread, 7/8" long
McMaster
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2.10SCREW-M3x4-SHCS4M3x4mm socket-head cap screw (2.5mm drive), stainless preferred
McMaster-Carr
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2.11WASHER-#10-flat4Washer for Number 10 Screw Size (stainless preferred)
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2.12ZIPTIE-6in1Medium-small 6-inch-long (150mm) self-locking nylon cable tie. Usually about 1/8" wide. Can substitute 8" tie
Amazon
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3KS-2022-Electronics1Attach to main board
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3.1CA-JST-XHP3-JST-XHP31
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3.1.1CRIMP-JST3Crimp 1 JST pin, including stripping and trimming wire
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3.1.2JST-XH-PLUG-31JST XH plug housing, 3-circuit, model no XHP-3
JST
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3.1.3JST-XHP-3+Wires1JST XH 3-position plug with wires
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3.2CA-KeySwitch20221
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3.2.1ASM-CRIMP-QuickConn2Crimp a 0.110" x 0.032" quick-connect terminal, including stripping and trimming wire
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3.2.2CONN-Quick110x0322Quick connect female crimp 0.110" wide by 0.032" thick. Typical: TE Connectivity 60197-1. Usually sold in reels; need a vendor selling cut strips. DHB bought 60577-1, not realizing the varying dimple position. C&K switch tabs have dimple near tip, so TE style 1.
Mouser
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3.2.3CRIMP-JST2Crimp 1 JST pin, including stripping and trimming wire
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3.2.4JST-XH-PLUG-21JST XH plug housing, 2-circuit, model no XHP-2
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3.2.5JST-XH-SOCKET2JST XH crimp connector (sockets only; pins are in headers), model no SXH-001T-P0.6
JST
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3.2.6WIRE-Stranded-26AWG-Y-12cm2~5in of stranded AWG 26 wire; yellow (preferred)