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Robot Basics      ...     14306 Views
Author's name: WeRbots       

I`m calling this robot basics, but I`m leaning to more like a minimum "robot."

Introduce a couple motors, a switch, and some bumpers.

Add some delays, etc by using a timer control. Thus it can crawl backwards for example, for 1/2 second then start going forward again. Then you can power on a right or left turn on going forward.

If you put a listing and it leaves out some, then you have exceeded the limits for an input box and you will need to split...

There`s a bug. If you use pre for format control, the pre shows in the listing for the project. For now, skip the insertion of the <pre>uses direct format</pre>.

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Electronics for robotics:
LC circuits for driving PONG! Calculating 8mH`s significance.
RLC impedance matching for driving laid wires for robotic mowers, etc -> thing moves straight, stops when something in path. Does not go around barriers, just Stops!
Rules of thumb in swapping your parts for the ones in the one you saw on You Tube...
Lowest investment: Frames - WIreframing, Motors - Steal from kid`s toys (distract them with Android devices) Watch out for high current drain motors (steal from the best toys), H-Bridges, cuz we want complete control, and something you can transfer ideas from your brain in getting a device you can only philosophically control. (The number of nicks in furniture and walls in your home will drive your choices).
So, if you want only to understand the concepts, Steal a Remote controlled car and fiddle around with it for a while until you understand the parameters of control you have at your disposal through a control stick. Then, set about to turn the car into a robot. That level of complexity will drive you forward.
Soon you will find you are better off getting two identical cars because they often use a simpler motor to steer the cars, this way you can match the motors. Or, better still, you put the kid`s toy remote car back on the shelf - keep it for reference.
Motors: Just plinkin around? Not serious enough to spend much money to find out get broken cars for less than $5 ea to convert. Choose proper toys: spin wheels if front wheels move on the same side as back wheels, this is a great candidate for so much fun with your new idea.
Motors: $50 won`t be too much to spend, or you got excited when you found out you could build a robot that you could entertain party guests with, while tampering around with robotics a bit.
Motors: You`ve already got a friend who`s shown you his home-brewed bot, so you want one. His won`t climb over pillows, so you want more power, Drill motors are in your future. Get good at clamping down cylindrical motors complete with gearboxes and you have the promise of some real powerful robots capable of anything a lower class (by weight, refer to URLs listed at the end of this article. (Chinese drills are cheap, and think of the set of crummy quality drill bits that you can grab for LT $50) You`ll find a lot of info on this application in robot compettion by weight class many are drill-motor powered.
Motors: Plan to spend a potload of money if you decide these robots are cool, but wouldn`t powerful sensors make for some fun bots????

Sensors: Pong is coming. I told my wife, when I saw the state of the art in self-parking auto technologies, Ultrasonic Transducers for 12v applications are coming soon, I just bought 4 new transducers which I run from the 12Volt system in a complete, fully functional wheelchair. You are about to enter what some would call a "world of hurt" your power-chair, converted to robot. That`s because you have always wanted to have a tool you don`t have with you, when you are outside with potential muddy feet and are holding a new plant upright when you realize your toolbox, containing the one thing you don`t have, but desparately need is across the yard by the lawn mower you were working on till another "honey do" jumped up on you.

Controlling the Motors... This is about a robot, a machine that can do "something" without human intervention. The idea of the robot controlling a power chair for under 100 bucks!

Video and Everything - Use that guy who contacted me on YouTube.
Author's Assigned Keywords:    Robot Motor Control    Robots

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Definition: A Robot Is ?????     
What is a robot?

Many things, but for this intro it will be anything that moves around fairly autonomously. That leaves us wide open for lots of potential applications we would call robot. So we would focus it by adding it should perform some desired function.

Now we have something to use for a philosophy to guide the development of the robot into something we can BUILD!



Robot Propulsion     
Our robot will have to have it's own method of propulsion. Legs, wheels, something to let it move around in our designated area. Different applications would require different mobility approaches. It could move by flying on the one hand. But just to keep it kind of uniform and mainly cheap, we'll specify it has to move around a room. With carpet and potentially rugs.

Still, it could use legs. Let's see, for every leg joint I would have to use several methods for powering the leg and providing enough degrees of freedom to make the leg walk. Then multiply by Four, or possibly three or two. Hmmm. Too steep for me.

How about 3 dollar electric motors at every joint, or cheaper, thus better still. Spend a bit more on motors and only use two of em to provide locomotion! Brilliant, how can we do it? How about a wheel?

Hmmm, get the cheap motor some gears and use 2 to 4 motors and you have all kinds of locomotion potential.
Making a Motor Move Itself Around     
Show square-wheeled bot. Talk about gears and the gear motor... How you experimented with even the walking spokes. How Robo Quad uses offset regular rotating motors to achieve it's walk.

Point to Quadraped using servos, stuff like that...

Show electrical circuit and motor... Schematic of Buggy Bot...

Show how circuit or transmission can move forward or backwards I think... Maybe I don't need this???
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No parts list with this project. Scan the 'Junkbox Reviewer' below! Find projects by clicking on their parts. Got something in your junkbox? Here's your spot to find something fun to make or build!

 

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