Let's Make Robots!

The G_Bot

Runs around sees things and avoids them and perhaps makes some robot noises via a speaker

Hi everyone.

I am Giovanni Izar.

I am brand new to robotics and this will be my first attempt at making one. I will call it “The G_Bot.

I have skimmed through the rules and intend to follow them but forgive me if I stray and correct me when I screw up.

I have all my parts but I am not sure if they are all correct so if anyone can spot something wrong or out of place please let me know.

When I got my Picaxe 28x1 it came with a 3 battery holder. (I got myself a 4 battery holder from RadioShack (The Scource in Canada).  This immediately got me thinking voltages and I have concern about whether the motors I have will hold the voltage I will be feeding them.  I guess they will just go faster but  I will be watching for smoke none the less.

The servo I got is a continuous rotation servo. Will this be ok?

I like the look of the Tamiya gearbox i found and decided to use it instead of the G9 motors in the Start here tutorial. I may get the G9’s later.

The sensor I got is listed as a GP2D12 and not GP2D120 as noted in the tutorial. I hope it is the same thing

I forgot to order the servo chip so I am going with the resistor instead.

I got all my parts 2 days ago but could not get myself to start until I had read enough here, photographed and documented everything.
I am a CNC Programmer Machinist and will probably make my own wheels.

I am now ready to make a robot and hope to get some input from some of you.
Knowing me this Robot will look nothing like I expect it to look right now and will probably take much much longer to build than most of you because I am never happy with what I produce the first time round. For instance I will probably turn out 6 pairs of wheels before I am happy with it.

My Photos are at www.izars.com/robo

I own the domain and am prepared to dedicate it to LMR if that is a good Idea

Whish me luck.

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Hey g_code, I suspected you might be a 'CNC person' judging by your name =)
I've used the same Tamiya gearbox at 6V before with no problems. You will however need some kind of motor driver - at the moment you have nothing capable of handling the current needed to control the motors.

Hey g_code!

Very much welcome here, and thanks for posting and the offer regarding your domain.

However, I will have to ask you to please read the Rules

Thanks :)

Thanks for the welcome Frits.

I am not sure why you say I must read the rules.

I did but I think I am lisdexic and may not understand it all;-)

Could it be that you want the LMR logo there (It is there now take a look :)

Could it be that I should not use my own Domain?

Or is it because My Robot is not yet complete? I did ask about it in the shout out and was told that I had to have started it.
I actually did start it last night (Assempled the controler and soldered wires to it.

Please let me know.

As I said my domain is available for any kind of use as I just use it for email addresses and My resume.

I DONT intend to use it for Spam or advertising.

LMR Is my latest addiction and wish to be an on going part of it.

Thanks again

:)

It was merely because your picture was a picture of a third party product. And the rules state that you need to have "something to show" before posting as a robot. A third party product case is not that something, that's all.

The reason for all this is is just that we woudl get a lot of "i intend to build this", posted as robots if the rule was not there.. and that would make a sad collection of robots, these things should be in the blogs.

All cool, no prob, have fun, and thanks again for joining in :)

You keep referring to "the tutorial". Do you mean the "start here" tutorial?

The GP2D12 is NOT the same as a GP2D120. The GP2D120 has a much shorter range than the GP2D12 (4-30cm vs. 10-80cm), but is more precise within that range.

As TeleFox said you need something to drive your motors capable of providing the current your motors draw. A resistor (as you mentioned?) isn't gonna do it.

A servo for continuos rotation has been modified to act like a dc motor. You no longer control the ANGLE of the servo but rather the SPEED and DIRECTION, which isn't very suitable for mounting a sensor on top of it.

PS: When fritsl asked you to read the rules he probably meant this: "Do not post as a robot if you have not built anything". Your entry would be more suitable as a forum topic or a blog entry ;)

Hi and thank you for your input Aniss1001

The GP2D12: Will it work or do i need to rush out and get the right one right away?

Motor Driver: I do have the driver chip I just forgot to mention it in my post. (I will whip myself 7 times before going to bed tonight for forgetting)

The Continuous servo: Again, Will it work or do I have to rush out and buy the right one. If you mean its going to be more difficult to program but will still work I would be happy with that.

If I have to go out and find the right parts I will whip myself from now untill I get the right parts.

 

Thanks again

GP2D12: It works fine. It just depends on the RANGE you want detect. I read that the two sensors have the same elctronics and just have different lenses (therefore range). I prefer and use the GP2D12 because it has longer range. This mapping test I made is based on a GP2D12.

Continuous servo: If you plan to mount a sensor on i, it's no good. You have no way of telling in which angle it's pointing (see my former post). So yeah I would get a NORMAL servo for that job. 

Motor driver: What chip did you get? Make sure that it can supply the current needed by your motors.

PS: Please stop whipping yourself :D

Igot the LD293D

I'm using an L293D which (as I recall) can provide 2 x 600mA. Dunno what difference between the two chips is? :/

Anyway check the specs on the chip and your motors and see if they match...

Sorry Aniss I made a mistake (again)

I Have the same chip as you, the L293D.

I have learned that the motors are type FA-130 and are rated for 3 volts

I dont know what type of current they use and I am trying to find that out now.

I am very raw with all this electronic stuff and have a lot to learn. I wish I could just download it all directly to my brain.