Making Robots at Home

Other Hardware Robotics
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Hello

I am a newbie.

I am looking to make Robots at home starting with:

  1. A Simple Robot
  2. A medium hard Robot
  3. A complex Robot
  4. A heavy-complex Robot

How do I go about it?

Are there such robots already made with Arduino Uno?

Please advise.

Thank You.

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Do you want to build completely from scratch or buy a kit to program yourself?

Wheeled or tracked based robots are a lot easier than ones with legs. Bipedal robots are probably the hardest.

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Get a 3d printer to make all those odd bits, mounts, linkages, etc. Otherwise you're stuck with what the local RC shop can order.
Learn to CAD.
Learn to generate Engineering Control Drawings (see mil-std -100C et seq.)
decide on one or two hardware sizes and stock nuts, washers, lock washers, and bolts with a common head drive. I use allen cap head SS machine screws and nylock nuts cause they look cool, but you can pick what you like. This is important to decide as it guides your mount hole sizes, etc.

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I will go for a kit in the first shot. Then build completely from scratch. Will like to go for wheel robot and then one with legs.

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I would like to use the following:

https://robu.in/product-category/3d-printer-parts/3d-printing-service/

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A 3D Creality Ender is ~$300USD, less if you get it on sale. Filament is $15USD/kilo + the same for shipping.
TinkerCAD is free and is easy to design 3D parts in.
NanoCAD is a free AutoCAD work-alike for 2d drafting.
Outside services are expensive & slow, vs able to go from idea to prototype parts in minutes. Most parts take several iterations to get right, having to send out and wait (and pay) slows the design thinking process.
Look at the robots you want to build and count how many DIFFERENT parts are in it, and then guesstimate the cost/delivery time. Then multiply it by 3X for iterative refinements. Compare THAT to the cost of buying a 3d printer and a kilo of filament.

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after TinkerCAD i recommend OpenSCAD

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One place to start for DIY robots is this tutorial site.

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I am trying to make the following robot:

However, the robot falls. It does not work as shown in the link. I am yet to find the cause of its failure (mostly the servo motors are not properly initialized)

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Wow! Bipedal robot - In at the deep end....

I can offer my experience of a hexapod (6 leg robot) I had years ago I got the gait sorted and held the robot off the ground as it moved the legs to their "start" position.

I could place the robot on the floor and it would "walk". However, with each step it would sink closer and closer to the floor.

Either the servos weren't powerful enough to carry the weight of the robot or my power source wasn't up to the job.

Can your robot support its own weight whilst standing on 1 leg? Is it tipping over because the moving leg hits the floor too soon.

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Perhaps you might be interested in this easy-to-build robot.
QUADRUINO ROBOT QUADRUPED WALKING DIY

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