Open Duck Mini v2 build cost: BOM and real budget

Q: How much does Open Duck Mini v2 cost?

The official v2 repository targets a full bill of materials below $400. The final cost depends on supplier prices, printing, tools, spares, shipping and tax.

Q: Does the BOM include 3D printing?

It can list the printed parts and files, but it does not include printer time, filament, failed prints or a commercial print-service quote.

Q: Is Open Duck Mini v2 cheaper than Microduck?

It can be cheaper on parts, but not reliably cheaper as a complete project. Microduck is $399 assembled before tax and shipping; add the excluded build costs before comparing.

Short answer: The Open Duck Mini v2 repository says the full BOM should cost under $400, but that is a parts target rather than a guaranteed delivered-project price. Budget separately for printing or a print service, filament, tools, fasteners and cables missing from your order, failed prints, spare components, shipping, tax and build time. The official BOM and CAD were checked on 23 October 2026.

This page is written by the team behind Microduck, an assembled $399 alternative. That conflict is exactly why this guide does not invent a dramatic DIY total. It shows what the primary source specifies, what the source does not include, and when building still makes more sense than buying.

How much does Open Duck Mini v2 cost to build?

The official Open Duck Mini v2 README gives a clear target: the full BOM cost should be under $400. The BOM is the parts list. It is not a quote for every completed robot because builders arrive with different printers, tools, spare-part drawers and skill levels.

Budget line	Included in the official BOM target?	What to check
Motors, controllers and electronic parts	Yes, if listed in the current BOM	Match the exact revision and quantity
3D-printed structural parts	Usually not when you print them yourself	Filament, electricity, failed prints and printer wear
Print service	No	Quotes vary by material, quality and country
Screwdrivers, clamps and general tools	No, unless listed	Buy only what you do not already own
Spare motors, cables and fasteners	No	Budget for at least one mistake or wear item
Shipping, import tax and duties	No	Depends on supplier and destination
Your time and calibration work	No	The most variable cost of the project

The Open Duck Mini v2 README links the current BOM spreadsheet and states the under-$400 target. Always use the linked revision because a saved copy or an older build log can specify different parts.

Which parts dominate the Open Duck Mini BOM?

The actuator set and electronics dominate the cash budget; the printed body dominates the time budget. A small biped needs a complete set of servos, control electronics, a Raspberry Pi Zero 2 W-class runtime computer, power hardware, cables, bearings and fasteners in addition to the printed shell.

Do not reduce the budget to a motor count. The work comes from matching the exact revision, sourcing the correct gears and connectors, printing tolerances that allow joints to move without play, and finding the missing screw or cable after every assembly step.

The project publishes the design in CAD and supplies printed-part files through the same repository. That is the value: you can inspect and repair the machine. It also means nobody is shipping you a pre-calibrated unit with every part already accounted for.

What does the BOM exclude?

The BOM excludes any cost that cannot be attached directly to a part number. The largest omissions are printer ownership or print-service quotes, the first failed print, shipping and taxes, spare parts, tools and the hours you spend building, flashing and debugging.

That does not make the BOM misleading. It makes it a BOM. The mistake is comparing a parts spreadsheet with a retailer's delivered price and calling the difference pure savings.

Write each number down before ordering. If the result still beats the value you place on your time, the project is a good fit.

Is Open Duck Mini v2 cheaper than buying Microduck?

The parts can be cheaper, but the completed projects are close enough that cost alone should not decide. Open Duck's official target is below $400 for the BOM. Microduck is $399 before taxes and shipping for an assembled, calibrated robot with battery, USB-C cable, game controller and seven installed moves.

One project buys parts and knowledge. The other buys time, integration and support. Use the comparison only after adding the items outside the Open Duck spreadsheet.

Decision	Open Duck Mini v2	Microduck
Start with	CAD, BOM and printed parts	A calibrated robot
Main work	Print, source, assemble, wire, calibrate and train	Drive, code, simulate and retrain policies
Main risk	Missing parts, tolerances and integration	Pre-order timing and product availability
Openness	Design, electronics, runtime and training project	Apache-2.0 robot software; hardware designs not complete
Support	Community-driven	Maker support and spare-part packs
Reason to choose	Building is the experience	Walking and retraining are the experience

How long does an Open Duck Mini v2 build take?

There is no honest universal build time because print quality, access to parts and builder experience change the project more than the assembly instructions do. Plan it as a project with multiple checkpoints, not an evening kit.

The sequence itself is predictable: print and inspect the parts, source the exact BOM, configure and test motion hardware, assemble the body, flash the runtime, follow the calibration guide, then move through simulation and policy deployment. Each checkpoint can reveal another missing screw, cable or tolerance issue.

An experienced builder with a tuned printer and a complete parts kit will move faster. A first-time maker should preserve extra weekends for print failures and reordering. That extra time is part of the project, but it belongs in a buy-or-build comparison.

When is building Open Duck Mini v2 worth it?

Building is worth it when you want to understand the complete machine and are prepared to be its integrator. The project gives you the mechanical design, control runtime and a community working on the same sim-to-real problem.

Choose differently when the goal is to spend the first weekend driving and programming. A manufactured robot removes the body-build risk and lets the learning begin at the SDK and policy layer.

If the build is the point, the cost spreadsheet is a starting map, not a finish line. If saving money is the only goal, compare the all-in project honestly and expect the margin to shrink.

Open Duck Mini v2 cost FAQ

How much does Open Duck Mini v2 cost? The official v2 repository targets a full BOM below $400. The final cost depends on supplier prices, printing, tools, spares, shipping and tax.

Does the BOM include 3D printing? It can include the model and list printed parts, but it does not include your printer time, filament, failed prints or a commercial print-service quote.

Is Open Duck Mini v2 cheaper than Microduck? It can be cheaper on parts, not reliably cheaper as a complete project. Microduck is $399 assembled before tax and shipping; add the excluded build costs before comparing.

Can I use a print service? Yes. Get a quote for the exact repository revision and material before assuming it is cheaper than owning or borrowing a printer.

Where should I buy the parts? Start with the official BOM linked by the Open Duck Mini v2 repository. Use its exact revision and verify current stock and shipping.