Let's Make Robots!

BarkTrak Trailer sugestions help


Hi All,

I've been busy with my robot recently. I've rebuilt the voltage regulator, added a battery monitor all situated on the newly fitted expansion boards on the rear. The battery is now housed in the battery housing (Great place to house it really.)

I've also revisited my loft and found BigTrak's trailer.

My Project

I wanted to post a new video of my robot on here, but I didn't want to keep moving my project to the top of the front page, so I'll post my video here.

I used this music, because it's called Bring Me To Life



Challenging question

Every time I ask a question on here, I get lots of great answers. I'm sometimes overwhelmed by the collective knowledge that must be on this site. It probably adds up to thousands of years of experience.

So, I'm going to pose another question, a hard question, to see if anyone can answer it. Just as an experiment.

Ok, here goes...

If a quark is travelling 3 nanoseconds below the speed of light. What to the power of R is its mass density?

Heat sink



So I've read in many places, I need a heat sink on my motor driver chip.

That's no problem, I'm assuming a chunk of metal will do the trick, but how do I attach it?

Is there a certain type of glue I should be using? I only ask, because I don't want the glue to melt.


The Bromz

Time flies like an arrow; fruit flies like a banana.   Groucho Marx

Thank you to all LMRers


Just a quick note to thank everyone on here who helped with my project.

My robot is now working just great apart from the flat battery, because I've been using it so much

Here's a video for anyone who's interested.

Thanks again,

The Bromz.

3D Printing


Found this online and thought it may be of interest to people on here.


It's a 3D printer you can build yourself. It's a bit beyond my building capacity, but I'll bet there's people on here that can build one.

Navigate around via ultrasound, barks when someone knocks on the door.
Using a

Edge Detection

I've noticed a lot of robots with edge detection, to prevent them falling off edges (obviously).

I'm curious as to the type of sensor used for this. I'm assuming it's IR, but are people using an off the peg sensor, or making their own?


The Bromz.

Soap opera detection

Hello people.

I really need a robot, that'll detect when my wife's watching a soap opera on the tv, then drive into the room and change the channel to something more interesting, like Top Gear.

Any thoughs, let me know.


The Bromz.

Floating ADC inputs


Just been reading about floating analog inputs. I understand it a lot more than I did, thanks to you guys on here, but I'm still not 100% on the subject.

What I really need to know, is...

Do all the ADC inputs on my Picaxe 28X1 project board need jumpers on them? Even though I'm not using any analog inputs.

Thanks Lads,

The Bromz.