Let's Make Robots!

Yet another newbie's try

Navigate around with an srf05 (as soon as i get the code right)

 UPDATE: He's  back, and better than ever... the amazing Nick! * the crowd goes wild* I know, I've not been aktive on LMR for a while, had a lot of school-work and stuff, so I had no time. Well anyway, I've moved my robot onto a diffrent chaissis, (the other one broke) and added the servo and Srf005. I'm all done with building, but well, you know.... programing isn't my thing. But I'm giving it my all, and i should be done in... *he types something into a calculator* 17 Years!


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 I will post a vid as soon as I get the thing moving.

Update: I am know in a super mood, because i finally found and fixed my problem.It turned out to be a stupid little soldering mistake. But know I have proggramed my robot to go fowards 3000 and then back 3000. SO far so good :). (Will post vid soon)

 Update: I have hooked up my two motors and soldered them up to A & B. I have also glued the Castor. But somehow the turning isnt totaly in check, one wheel seemsnot to turn.

Yet another newbies try, this is my first robot!!! At the moment its not much, but you just wait, one day it will rule the world!

so far i have:

A CD plastic hull

2 cool motors (with wheels)

a switch, a batterie and a lot of wires.(If need be, up to 15m)

I have for my "third wheel" a exelent castor, from some kind of thing

I have my super-di-duper PICAXE 28X1, witch i have already used for a super cool blinky LED proggram

and I have a robotic servo(modified for contin. rotations), and mounted atop is.... My SRF005.

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Sounds like you had the power connected back the front to the L293d especially if it's the only thing that got hot.

If you can't work out what went wrong then post a diagram of how you wired everything up and we'll try to help.

Proggraming under way!

Just one problem, when i dont uplaod a code at all, just connect the picaxe to power, one of the motors turns.

It turns sloly baxkwards, and the only way i can stop it is if i type: high 6, low 7.

If i type low 6 high 7 , it just turns at normal speed backwards. but i cant make it go forward.

Plus the L293D starts heating up like crazy, and it smells like something is beeing burnt? :( any ideas?

A short in your circuit? It would be interesting to see your code and a pic of the circuit. It sounds like you may have a short... Are your motor connections touching anythign OTHER than the holes you soldered them to? Wipe the code from the PIC (transfer a blank screen by deleting code from the editor and pressing F5). Does it still move the motor backward?

Nice chassis,

Umm... Pergo floor? --Yup, I'm a flooring snob...

There must be photos of my floors all over the place and you never commented. I'm hurt.

To be completly honest... I dont know! :P /Nick

Looks good, I like the chassis. My understanding of 9v batteries are they are good for things that don't use much current, but are crap for motors and stuff because they run out of juice too fast (someone correct me if I'm wrong). Are you going to use a second battery for the motors and servos and stuff? 
Depends, on what kind of motors I get, but I dont think so. the servo already works with 4.5 V

I would agree, 9v's are not great for large motor apps, plus they can get hot fast.

I'd recomment using 4/ AA or nimh cells. sub c rc car batteries are great for larger projects.

make sure to use a voltage regulator as well...7805's are typical and simple to use. 



Yeah it looks like you've got a great chassis and some perfect parts.  I'm really looking forward to seeing the finished product!