Let's Make Robots!

ROV submarine

I playing with the idea of building a ROV.

A ROV is a Remotely Operated underwater Vehicle.

I plan to start simple, with a webcam connected to a computer, and 3 motors with propellers controlled by switches, all of it strapped to a frame of sealed plastic tubes. Something close to this instructable

But the robot geek in me wont stop there! I want to build:

A moisture sensor (to warn if the electronics compartment has sprung a leak) 

very fast grippers

This has to be the fastest robot hands I've seen...



run fast
My unsuccessful Mr. basic competitor. I was very unlucky with the Dagu kit I got and still haven't managed to get the chassis running normal. With the normal amount … Read more

Mr. Shortage. Water Shortage

I've spent a lot of time trying to get a reasonable function out of a water spraying mechanism that could fit inside the small frame of Mr. Basic, but the only solution has been keeping the water it a bottle in avertical position. This has made Mr. Basic very prone to tilt over and land on his side during creative maneuvering. So today I saw a cheap pea-shooter with 1000 plastic pellets for $11 in a store, and it looks like Mr. Cat Squirter Now is becomming Mr. Violent.

Now if only I could get these wheels to work with the Mr. Basic original drive train.

5v voltage regulation.

Is there a simple thingy that I can hook up to any voltage higher than 5V (within reasonable range) and always get 5volt out?

LMR DAGU Contest rules anyone?

Oddbot mentioned in another post that some rules would/should be announced regarding the LMR DAGU Contest.

I thought the rules were vaguely outlined as something like:

1 Use the Mr.Basic kit.

2 make sure your robot is way cooler than the other contestants.

3 good luck.

-So, do we need any more rules? Do everybody have to use all the parts from the kit? Which partscannot me excluded? Is there an upper price limit?

PWMOUT only on two output, that are really inputs?

Am I reading the manual (section 2, page 128) correctly? Can I only use the PWMOUT on 2 specific ports on my 28X1?

This would mean that I can't run more than two outputs with pwm, and that has to be the digital in/outs 1 and 2, so there's no hope of running it through the onboard L293D??

I must have missed something, surely there is a way around this. Pulsout maybe? I'm R'ing T. F'ing M. now, but if somebody already knows the answer, that would be helpful..





'Axe as RC speed controller

Would it be possible to connect the output from a RC reciever to the digital input of a pcaxe 28x1 board and controll the motor outputs?

Of course it's doable, that's not really the question. But does anybody have any thought regarding it? Has anybody done it? I presume the signal out from the RC reciever is a standard Servo-signal. I know CtCpassed a signal from a RC reciever through his 28x1, but I don't wanna controll servos,I wanna controll a couple of DC motors.


messing with the motor outs (A and B)

Just a thought:

(lets call the four motor outputs A1, A2, B1 and B2)

What would happened if I connected a GM10 (with the original spring still attached) between B2 and A2? Like in the illustration below


I was hoping to achieve the following:

4 wheels with 180 degrees turning

I saw a future concept car on a presentation on a documentary on Discovery Channel.

It had 4 motorized wheels, One in each corner (like a conventional car). But each wheel could turn 180.

It would mean that your car could drive in any direction, and rotate on the spot. Here's a link to a similar concept