The RepRap motto is "wealth without money" - for this assignment you are to create wealth by making an open source design that has value to you. It must be 3D printable on your Jellybox and cost less than a commercial equivalent (if such a thing exists).

Assignment[edit | edit source]

  1. Design something of "high value" that you can 3D print on your Jellybox
  2. Make sure someone else has not already done it - search and
  3. Design 3D printable components with ANY CAD program but the use of OS CAD programs (e.g. OpenSCAD, FreeCAD, or Blender) earns extra credit points
  4. Create an account at or
  5. Upload your design under an OS license to or - include: Source files, STLs, a picture, and a brief description including costs and $ savings (make sure you make the duration forever) If not using SCAD or Blender - upload your CAD model in a zip file.
  6. Add picture, link to your Libre3d or Thingiverse page with name, commercial equivalent link+cost, and economic savings to table below (see example).
  7. Print component and bring to class - Complete and due by last day of classes this semester

Grading[edit | edit source]

  • 30% Print quality
  • 20% Documentation
  • 50% Design (design for printing, aesthetics and function)

Automatic reductions:

  • 50% no source
  • 10% per day for late

Table of Value[edit | edit source]

2019[edit | edit source]

Digital Photo Free Design/Link to Libre3D Commercial equivalent/Cost Approximate Savings in US$
PhoneHolder.jpg RachaelOstheim [1] Cost of it was probably around $3 to make, but I would retail it around $10-$15 depending on availability.
Chapel ornament.jpeg Chapel Ornament $12.95 Cost of ornament is 40 cents, savings of at least 96%!
Gauge Holder.JPG SammyKeller (talk) 20:59, 6 December 2019 (UTC) Gauge Holder [2] about $28.70 (roughly 86%)
CheckerBoard.jpg Customized Checker Board and Checkers [3] about $12.25 cost for total PLA: $1.85 (85% savings!)
Photoholder.png Customized Photo Holder [4] approx. $10 (50% savings)
Prin coaster.jpeg Principia Coaster $12 for 16 coasters ($0.75 each) cost $0.46 (38% savings)
File:LightningNametag3.jpg Lightning Charger Cord Name Tag $28.99 for 1 3D Printed Nametag cost to manufacture $0.09 @ 4.5 cents per gram of filament (99.67% savings)
Hanger end big money.png Hook big money.png Middle arm big money.png [5] commercial equivalent $10-$25 [6] cost to manufacture $1.50 (roughly 10%-20% savings)

2018[edit | edit source]

Digital Photo Free Design/Link to Libre3D Commercial equivalent/Cost Approximate Savings in US$
XboxStand.jpg Xbox One Controller Stand [7] $11.25 on average
Desktopdrawer.jpg Desktop Drawer for 5.25 inch Drive Bay [8], $20 $18
Outlet wall safe.jpg Hidden Outlet Wall Safe $5-20 Roughly $10 on average, depending on where the commercial product falls on the price range.
A cranford sharpie holder.jpg Sharpie Marker Holder competition marker holders, $15-20 ~$17
BEDRISER.jpeg Bed Riser $5-22 On average about $15 saved
Keycaps.jpg MX Cherry OEM Profile Keycaps library (OpenSCAD) Commercial option: buy an entire set of keycaps for $20-40 Per cap cost to print: $0.04-0.08 (over 99% savings). Entire keyboard of 104 keys: ~$5.20 (~75% savings)

2017[edit | edit source]

Digital Photo Free Design/Link to Libre3D Commercial equivalent/Cost Approximate Savings in US$
Hangar.JPG Multi-Hanger Clost Organizer [9], $9 $8.50
Acoustic Phone Holder.jpg Acoustic Phone Holder [10], $50 $45
IPadProPencilStand.jpg iPad Pro and Apple Pencil Stand [11], $29.99 $27
Flowerwateringsystem.jpg Flower Watering System [12], $15.90 $14
IMG 0255.JPG Hair Tie Bracelet [13], $10.99 $10.87
IMG 8618.JPG Elf Ear Jewelry [14], $30-40 $38
Screen Shot 2017-05-05 at 1.43.52 AM.png [15] [16], $2.6 each $2.4
Cufflinkfinal.JPG [17] [18], $19.99 $0.05
Hat holder.jpg [19] [20], $29.99 $0.80
DrainProtector.png [21] [22], $6.97 $3.87
DroneMountVTX.jpg Drone Video Transmiter Mount [, $3.99 $3.79
Image.jpg Chapel Cookie Cutter [23], $8.99 $8.75

2015[edit | edit source]

Digital Photo Free Design/Link to Libre3D Commercial equivalent/Cost Approximate Savings in US$
Acoustic Phone Holder.jpg Acoustic Phone Holder [24], $50 $45
Laptopstand.jpg Adjustable laptop stand [25], $80 $50
Doublebanana.jpg Double Banana Hook Bllafata (talk) 06:53, 19 November 2015 (PST) [26], ~$17 $7 (not counting the cost of importing and time)
Uni-Troll Base.jpg Uni-Troll Downrigger Base By: Connor Kmiec [27], $23.99 $21.76
Free Float Handguard.jpg AR15 Freefloat Handguard By: Austin Ketterhagen [28], $99.99 $97.66
SkiWaxingVises.jpg Ski Waxing Vises By: Matthew Andres Power Pro Vise, $269.99 $233.96
BlowBackNozzleInternals.jpg Prototype Reciprocating Blowback Nozzle Typical Nozzle $25-85 $24-$84
Table saw insert.jpg Delta Minimal Clearance Table Saw Insert By: Paul StLouis [29], $33.23 $29.10
Cellphone Car Cup Holder.jpeg Cellphone Car Cup Holder WayneHelminen (talk) 18:53, 9 December 2015 (PST) [30], $13 ~$9
Pong Paddle.jpeg Ping Pong Paddle [31], ~$6.49, for standard paddle $5.20, plus never needing another paddle again
Glasses clip.jpg Desk or Car Glasses Clip Accessory, User:Thomas Korejsza Cost of plastic $0.41 [32], Visor Clip $12.90 $12.49
Earring holder.jpeg Earring holder Earring holder User:Dhwani (talk) ~$32 ~$31
Microwave Gears.jpg Microwave Gear Replacement Parts [33], $2.80 $2.60
Bottle Tree Assembly.jpg Bottle Drying Tree By: Robert Arden ~$20 ~$18
IMAG0389.jpg Euchre Score Board By: Hjhunt ~$10.00 ~$9.06
Coat hook with slider base.jpg Coat Hook with slider base

By: Handychandra7 (talk)

Depends on the material, ranging from $20 - $80 100 grams of PLA for ~$2, saving from $18 - $79 (90% - 97.5% savings)
20151209 185134 HDR.jpg [34]

By: User:Brhutchi (talk)

the full assembly costs around $40, 37 minutes to print, 5 minutes to clean part 12 grams of PLA for ~$0.30, savings around $39.70
9vbatterybox.jpg Duel 9V Battery Box By: Mike Hartl [35], $30 $28
Beerholder.jpg Beerholder on Libre3D & Can Holder on Thingiverse with FreeCAD file Comparable Bottle Holder, $9.99 61 grams of PLA for about 1.65 resulting in cost savings of $8.34
Potatomasher.jpg Potato Masher By: Ethan Marshall Commercial Potato Masher, $8.50 Cost of Printed Potato Masher is $0.61, Total Cost Savings is $7.89
Cat6Audio.jpg Cat6 Audio End Point By:Paul Bristol [36], $360 Cost of End Point: $43, Total Cost Savings: $317
With ties.JPG Necktie Hanger By:Tyler Ernest Tie Hanger, $16.29 $15.65
Toothbrush holder.jpg Toothbrush holder By:Erik Bain Commercial Equivalent, $7.59 Cost of toothbrush holder: $1.03, Total Cost Savings: $6.56
Phone Mount 4.jpg Longboard Phone Mount By:William Venis GOPRO SKATEBOARD RISER MOUNT, $31.58

Aluminum Alloy Skateboard Mount Holder for Gopro, $6.64

Cost of printed phone mount: $0.69, Total Cost Savings: $5.95 - $30.90
Modular Wine Rack.JPG Modular Wine Rack By:Kevin Sunderland Modular Wine Rack -low end, $29.99

- Modular Wine Rack - high end, $119.95

Cost of printed Modular Wine Rack: $9.50, Total Cost Saving: $20.49 - $110.45
Variable Holder Clamp.jpg Variable Holder Clamp By:Adam Pringle Headphone holder, $19.99 Cost of Variable Holder Clamp: $3.93, Total Cost Savings: $16.09
Extended Razor Stand Complete.jpg Extended Razor Stand By:Klbarie (talk) 23:19, 9 December 2015 (PST) No commercial equivalent multi-razor stand exists. Some vendors make custom artisan stands, $60 Cost of Extended Razor Stand: $3.40, Total Cost Savings: $56.60
KIndlecase.jpg kindle case By:Ngtanike (talk) 00:16, 10 December 2015 (PST), 15$ Cost of Kindle case: $3, Total Cost Savings: $12
Pocket Pegs.JPG Pocket Peg Triangle Game There is a larger size available to buy at wooden triangle peg game for,$2.69. I havent been able to find a pocket size version. $2.11 (78%)
Mossberg 500 Accesories.jpg Mossberg 500 Accesories Grip $19.95, Picatinny Rail $14.99 Grip: $15.49, Picatinny Rail: $14.69
Rachelcookiecutter.jpg Face Cookie Cutter Custom Cookie Cutter, $50.77 $50.54 (99.5%)
Toothbrush Stand.jpg Toothbrush stand By: Shyam Sanjeevi - Toothbrush stand, $9.99 Cost of Toothbrush Stand: ~$10, Total Cost Savings: $9 (90%)
Hockey Tape Dispenser.jpg Hockey Tape Dispenser By: Hannah Powers ~$12 (Not currently available) ~$10 (83%)
Ornament rgb led.jpg LED Christmas Ornament [37], $20 ~$13
Polish holder.jpg Rocking Nail Polish Holder Spill Proof Polish Holder on Amazon $11.45 $10
Autozoom mount.jpg DSLR Automated Zoom Mount By:Derek Chopp FFR-900 $249.95 $229.95
Controller holder.jpeg TV Mounted Contoller holder Commercial Equivalent: $20.00 Approximately $19.00
BatteryCup.jpg APX->XTS series battery adapter By:Matthew Zawisza NNTN8169A $51.98 $51.97
Coming Soon! 2-Axis Gimbal System By:Spencer Allen $240 Around $50 in savings compared to the listed example, though my design is considerably more capable.
Bottle Scoring Tool.JPG [38] By:Austin Howland [39], $49.99 $41.10
ChocolateMold.jpg Customized Chocolate Mold By:Troy Johnston ~$40 ~$38
Hanger Hook.JPG [40] By:Zach Chenier [41], $5.00 $4.45
Multipurpose cell-phone dock with slots for stationery and a pair of specs.jpg Multipurpose stand for cell-phone, spectacles, stationery and tools By:Karan Dhankani Market Price(mainly because it's not easily available): $48 Savings - $46.5 (~97% savings)
Wheel andguards.JPG Longboard bearing rust, debris and water guard By:Pjgoreck (talk) There is currently no commercial version of a longboard bearing rust, debris and water guard. The model is parametric and can be fitted to any wheel size. The size it is altered to will affect the cost slightly. Plastic Cost: Aprox. $1
777 Big money Folding table.png Longboard bearing rust, debris and water guard By:Pratiksha Rakhe A modifiable laptop table with table top and stand. Can be attached with nut, bolts and hinges. Savings - $40 (~80% savings)

2014[edit | edit source]

Digital Photo Free Design/Link to Libre3D Commercial equivalent/Cost Approximate Savings in US$
Hockey helper.JPG Hockey Helper Always unavailable but is $10.95 $9.98
1UPIncenseHolder.JPG 1UP Incense / Candle Holder [42], Closest commercial equivalent -$8.99 $6.92
Arduino Wall Mount.JPG Arduino Home Device Wall Mount [43], Closest commercial equivalent is an enclosure - $4.50 $2.91
SplinedBottomBracketTool.JPG Splined Bottom Bracket Tool Park Tool bike tools BBT-32C bottom bracket key - $10.76 $0.42
TP pic.jpg Toilet Paper Holder $4.99 $4.00
Mens Restroom Sign.jpg Libre3D Men's Restroom Sign Restroom Signs - Pair=$364.00
  • ->Individual (1/2 Pair)=$182.00
Four point probe.jpg Open-Source Four Point Probe (OS-4PP) [44], $7300 $1700
Tool for hunting.JPG Open-Source Hunting Tool [45], $7.89 $7.20
Oven sheath.jpeg Spatula Sheath [46], $9.95 $9.15
Pumpclip.JPG Insulin Pump Clip Connector [47], $19.95 $19.90
Custom T-Shirt.jpeg 3D Printed Custom T-Shirt [48],$5.99 to $24.99 $5.71 to 24.71
Repetier z Probing.png MOST DELTA Auto Bed Leveling This Project does not save money but time. The average time it takes for someone to level their bed takes approximately 2 to 4 hours. After the bed levelling system is set up it takes approximately 5 minutes to have the bed levelled.
MTUDivotRemovalTool.JPG Michigan Tech Divot Removal Tool Callaway Divot Removal Tool - I have found custom divot tools like this sell between $2.75 and $20.00 (depending on who the market is being sold to). $2.63 to $19.87
Batman's Equipment.JPG Batman's Equipment [49], 259.00

[50], 25.00 for each, 4 in total [51], 13.99 [52], 11.99

IceScraper.jpg Ice Scraper [53],$6.40 to $15.00 $6.00 to 14.60
3dsstand.jpg Nintendo 3DS XL Stand Commercial 3DS Stand - $12.95 $11.11
Guitar Tone Knob.jpg Guitar Tone Knobs [54]$7.29 for tone knob set $7.00
WCL.jpg Winter Carnival Letters and Punctuation [55] $11.60 for Paraffin Wax

[56] $9.96 for 64 Pack Crayons

Estimated $100 savings over their predicted 10-15 year lifespan.
Arctic Cat Intake.JPG 3D Printed Snomobile Air Intake Commercial product,$69.99 $67
PB 4.JPG Powder Baskets Commercial Baskets,$21.95 $20
Vinyl Stand.PNG Individual Vinyl Record Stand There are no/very few commercially equivalent products. Approximate cost for a product such as this would be $5 - $12. $4.20 - $11.20
Twfuller ginger grater.jpg Ginger Grating Plate Various commercial offerings for as much as $12-15 ~$10
IMG 20141210 160108.jpg Open-Source ORV Light Replacement of rotting case varies from $25-$100 depending on original lamp. ~$20-$95
FullSizeRender (1).jpeg Snowboard binding degree plate Commercial product, $10-$20 ~$8.22-$18.22
Lwilderbig$.jpg Sink Adapter N/A, no commercial equivalent available No burned or frozen hands
Soccer shin guard.jpg Soccer Shin Guard [57], $19 $17.68
Dock MotoG2.jpg Moto G2 Dock. Made by User:Ab91 No actual Commercial equivalent available. Closest is this, but only half of mine. $5-6. ~$4-5.
Parametric Sax Mouthpiece.jpg [58] Parametric Saxophone Mouthpiece [59], $35, There are a few .stl files for alto and tenor saxophone, but none with parametric code. This allows quick modification of dimensions for different saxophones, as well as for changing the tone the instrument produces. $34
Wimms.jpg Custom Case A blank case like this This has no holes drilled. Custom ordering requires time and money. ~$5-$200+
Propeller.JPG Customizable Propellers Normally costs $1 per propeller. ~$0.95
Tattoo gun.jpg [60] Tattoo Gun Normally between 70-400 ~$67-397
IMG 2040.JPG [61] wine glass hanger [62],$100-$189 $94.30-$183.3
Aircraftframe.png [63] Aircraft model frame [64],Commercial equivalence depends on size and should be more than $10 ~$7
Crochet.png Crochet Hook Holder for Single-Handed Crocheting No commercial version currently exists but generic work holders cost about $20 on amazon. $7
TabletStand.jpg Tablet Stand and bluetooth keyboard Many commercial versions exists like this one, but tend to be design for a specific tablet. $19.34-$59.34
ChristmasTreeStand.JPG Christmas Tree Stand [65], $22.99 $19.08 (base is made from a recycled shipping pallet)
Printiverse.png Printiverse [66], Expen$ive $Cheaper (The cost of a printer?)
Tiered stand.jpg Tiered Jewelry Stand [67] $20 $18.15
Bread Slicing Guide.jpg Bread Slicing Guide [68], $57.99 $56.56 (base is made from a scrap hardwood board)
MTU DESK1.png [69] MTU Desk Accessory [70] $23.99 $23.6
Prop front shane.jpg [71] Trolling Motor Replacement Prop Minnkota replacement prop[72] $39.99 $32.49
Yoke Cover.jpg [73] Airplane Yoke Cover Full Yoke $150. Cover costs $0.33
Physical-Photoresistor-Regulating-Device.JPG Physical Photoresistor Regulating Device New Light: $80+. Plastic Cost: <$0.75
Fairlead1s.PNG [74] Hawse fairlead for snowboard winch Fairlead $1.80 Cover costs $0.86
Heliostat Pankaj.jpg Heliostat for tracking sun! Heliostat $60-$80 $30-$50
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