Let's Make Robots!
Althou i just burned one, i think i could still share some info here :) This is an advanced motor driver for 12V motors. It is usually coupled with EMG30 motors, … Read more

burnt md23 :(

Ok, i burnt my brand new 50€ worth MD23 motor controller. I'm deeply desperate... I was all excited about its arrival with all the RD01 kit, i was all happy about the incoming testing and building and having fun with it, when suddendly all the magic smoke came out of it and dispersed for good. :(
BWAAAAAA :( i'm so saaaad :(

Sniff, ok.. So i'd like to at least have some idea of what happened, becouse i have none.. How can it happened ?
This is the chip that smoked:
37369566dded3f0378c85b4cb5b4b177.jpg

Servo and picaxe: need resistor ?

hello, i'm trying to use a servo with my picaxe. I tried it on Arduino before, and it worked just connecting the pins at the right position, without resistors.

now i just connected the same way on the picaxe, and it doesn't move.. I then remembered that in the "start here" project, a resistor was used.. So the question is: is it necessary? why do i need a resistor? and how do i wire it ?

Another thing that is probably messing up.. i have the darlington chip there.. shoud i remove it?

 

thanks :) 

Some considerations about Letsmakerobots.com

Ok, let's start saying that i love this site and i'd like to see it grow. So here comes the things i don't like or that could imho made better. They have mostly to do with the use of drupal and its "flatting" of contents. IE You can't easily say whether you're looking at a robot page, at a forum page, at a blog entry etc, and i find it quite discomfortable.

Robotic Airship, some ideas :)

So i was looking at some flying robot designs, just out of curiosity. I ruled out helicopters and planes: they require too much precision in crafting and are too complex.. But alternatively an airship could probably be built :)

I've read on wikipedia that a square meter of helium can lift about 1 kg. A square meter means a big balloon, but a Kg is plenty of weight for electonics!

If you use light components, you can probably stay under 0,5 Kg or even less.

Share purchase for Italy on Sparkfun

Anyone in Italy (possibly Veneto) wants to buy something on sparkfun ? i'm avaiable for sharing shipping expenses

A Playstation controller as remote controller

So, suppose i have a couple of those wireless radio serial modules.. I'd like to hook the receiver to my robot, and install the transmitter on a playstation controller. Now, given that i can make a protocol of my own, the question is: how can i interface with the controller buttons&joysticks ? i'd like expecially to read the analogic joysticks.. is it hard ? How is it build inside ?
Hello! This is a tracked robot i did a couple of days ago. Unluckly, is suffered from a severe design fault so i disassembled yesterday :) I'm posting it the same … Read more

Some cool documents about Kalman Filter

Ok, i started doing some tests with my IMU module. It turns out that, while it is has very low noise while standing still, is suffer greatly from the robot vibration and movements.. Some research was in the need :)