Let's Make Robots!

Tribot

avoids obstacles using a sharp ir sensor

After reading on LMR for a while and drawing inspiration and reading about loads of tips and tricks i thought i should share my first creation.

It is not finished and im not sure it ever will be, i will probably taking it apart and using the parts for something else before its done.

I first started building a Lego car with 1 continuous rotation servo for propulsion and one normal servo for steering and only a button for letting it know when it bumped in to stuff, the car was very slow and difficult to control and needed a lot of space for its huge turning circle so i decided to scrap it.

That led to the birth of Tribot. I ordered the additional parts i needed and made the bottom plate, i also bought some double sided tape that i had read so much good about ( it is that good!) put it together in one evening and started to program the next. My previous experience in electronics is very limited (so limited that the first thing i did with my arduino was to bur a led). Mu experience with code and c was limited to simple HTML and some Hello world level code in c++ so this was interesting, especially to write the code for detecting obstacles was not that easy, im getting the hang of the basics now and there is plenty of ideas to implement in this little guy.

Update.

I was discussing cnc machines with my friend the other day and this is what came out of it in the end... :)

Because of the low quality servos and construction in general the precision is crap! But it was fun and now it can write LMR :)

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What did you use to raise and lower the pen?

I used a servo to lift the pen and gravity to drop it again... i tried to keep it simple.

Awesome update!

1st: You may have inspired me to turn Why Tri around. With the IR sensor at the back and able to look forward over the two drive wheels, it may solve his 'big butt' issue (see video 5 on the blog page above).

2nd: Great job on the 'Write-LMR-Challenge'! It is one of the best robots at this I have seen. You should post a link to your robot on that challenge page.

Posted it on the lmr challenge page, didnt realize it was a challenge just something fun people started doing...

Thanks for the comments, always nice with possitive reinforcment

Well you got it right. The challenges are pretty much just something fun people started doing. ; j

Some of them have offered prizes too. Check the Challenges link for more fun ideas.

Two thumbs up for tri-wheel robots and home made wheels!

I liked the way the sensor is mounted and how it scans.. I dont see many robots with a sharp sensor mounted like this at the rear...

This guy really shows some attitude... Looks like something out of a terminator movie... :D

Good work...!!!

ooo, terminator good idea!

Sensor is on the back because of the readings it gives, it cant tell rely close objects from objects far away and now i dont have to worry about that. 

Thanks for the coments, seems to be loads of nice people here.

And yes he could realy use something to detect stuff far down, such as shoes ;) but i have a micro servo that i want to figure out a way to use with the ir sensor aswell.... not sure how yet but more movment seems fun :)

The front tires are plastic jar lids with some rubber around it, gives a better grip then i expected.

Cool bot, and I absolutely dig the main picture! Look at the face expression of that dude - nobody is going to fuck with he's front wheels. Nobody!