Let's Make Robots!

Xbee modules help

HI, well, the free day is arriving, so i thought i'd go to sprakfun and fill my cart.

what exactly do i need to have wireless COM betwen two microcontrolers, or PC, to micro controller, or even stand alone Xbee's?

I have these items in my cart:

Need help with a solar-powered boat robot


Two friends and I are starting to make a solar-powered boat for a competition (here's the link: http://techfest.org/competitions/torque/solarsplash/), and we need a little help. We're beginners with no previous experience.

how do i monitor power useing Analogue I/P's

Hi Everyone, I have a 28x2 picaxe. I want to be able to monitor two different battery power packs (approx 5v each) on two of the analogue inputs. This is so I can switch to the best one using a relay on one of the outputs to power the Robot. I will use a time OFF delay with a capacitor so the picaxe is still powered during switchover.

ir remote help please!!! and thank you!


i need help with this when ever i try to debug this with any of the 3 remotes i have at my use i get the same reply like for example i get 0 when i just press the button and i get 2730 when i hold the button, i even have inclued a screen, and for the code i switched the debug to 2 cuz 0 gave me problems


Internal Timers

Does the Internal Timers of microcontroller gets burn!

I'am using ATtiyn2313 microcontroller I blink the led by 1000ms delay but then I increased the delay by 9000000 does this burns the inetrnal timers now i'am not able to get the output and the led does not blink!


Weird error...

What would cause this:


Analog input - Not getting good readings

I am using a Sharp IR Analog Sensor (2 different ones, in fact) and the readings I'm getting on both are not 'correct'.  I'm using a PICAXE 28 & a Sharp GP2D120XJ00F or GP2Y0A21YK.

London Robotics groups?


Is anyone on LMR from London? Is anyone familiar with any London Robotics meetup groups?

Does anyone attend dorkbot? I meant to attend my first dorkbotlondon this month, but missed it because of work! The next dorkbotlondon is in February.

I'd like to get involved.



I need to build a receiver and transmitter for a set of Motorola TLKR-T7s. the transmitter and receiver is only required to over come a mountain blocking the signals from each other. I only need to transmit 2.4 km with it. I want to place the receiver/transmitter at the top of the mountain so to go over it instead of through it.

Ataque de Pánico! (Panic Attack!) 2009

Hi All,

I haven't decided if I should use this as inspiration for my first robot project, but I just might. Be sure to check out the video.