Let's Make Robots!

WK RoboCup 2013 in Eindhoven (Netherlands)

Anyone going?


WK RoboCup 2013 in Eindhoven

  maandag 12 maart 2012 | 10:12 | Laatst bijgewerkt op: maandag 12 maart 2012 | 10:17

My first PCB

Hi guys,

I started on some unfinished projects again but I could use some advice. I'm trying to build a board for the mini reef that can switch 6 devices (solenoid valves) at 12v DC with the PIC/Prop controller. I'm using diptrace for this as this seems to be the favorite choice. So far I love it.

I came up with the below but I'm running into some problems with the traces. Maybe someone can point out the right direction as I think that it must be possible to cross over a line (with some electonic component maybe)? The red circles are the problem areas.

Seasonal Greetings

Hola LMR!

Since the comming days will be busy I will take the liberty to wish everyone a happy new year with lots of new parts, projects and of course loads of fun! Feliz Ano ~Nuevo to the Spanish speakers! Hope to see you next year and thank you all for this great site.

Winter time, robot time :)


Money Problem? Use VISA and other ATM cards without PIN

The banks and guys from Cambridge are in a dispute over following document;


It shows you how to build a device that can acknowledge any (false) pin code you use on a card. Be quick it won't be there for long :)

Sponsor this! - Energy Metabolic Disorder

For real, I noticed some healty looking people begging for goods and/or money on the forum. As an army veteran I don't know what to think of that but anyway it seems to work.

A former colleauge and good friend of mine has a 3 year old son who will be lucky if he reaches the age of 10 years old. His dad (Gerald) started a foundation that benefits research into this terrible disease. Here's the message I just got from him;

Chat Roulette

As a promotional stunt the guys from "The Last Exorcism" got funky on chat-roullete. Check it;


Here's the movie site: http://thelastexorcism.com/index.html

Solarpanel flap-out device

Anyone seen a nice way to make solarpanels move on a robot (like flapping them in and out)? I can think of some things but maybe you guys have seen some cool examples somewhere. The plan is to flap them out when there is enough light and to flap them in when there's not.

Maybe I should buy a box of meccano.......

Small change in picaxe code makes things twitch


I have my Rommel setup and hooked up some leds. So far all fine. Using the code from Lets start here I added a high 2 and high 3 (and low again) to make the leds blink in the direction the bot is turning. Like here;

high 3
servo 0, 105 : servo 1, 195
low 3

high 2
servo 0, 195 : servo 1, 105
low 2


When I add these 2 the led blinks briefly but then the servo's start to jitter when it moves forward? Lights are off by then....

Strange little thing

After taking apart all the old HDD's i ended up with a small piece that took me a little to figure out.

I stuck 5 volts on the wire and nothing happend. Well that's what seemed. Inside the copper sleeve is a small magnet. Tiny but it holds few grams. So I tried again, this time with the magnet holding a metal o-ring. And yes, with 5 volts it looses its magnetic capabilities. Amazing.

What a boring piece of kit.

Maybe suitable for a little spring operated hatch or a magnetic switch.