Let's Make Robots!
Price: $362 USD
DS1052E 50 MHz Digital Oscilloscope Read more

Robot doing swan lake dance

Spotted this today: http://www.newscientist.com/blogs/culturelab/2010/10/robot-prima-ballerina-debuts.html

They call that dancing?!? I say Yellow Dance Machine performs much better ;-)

 

Just got 1st picture out from my oscilloscope

I got Rigol DS1052E oscilloscope out from the customs today. Unfortunately I haven't got much time to play with it yet. However I managed to get one screenshot out from it. Here's a capture from ATMega8's XTAL1 when the chip is run with 16MHz crystal:

Looks nice. More about the scope when I figure out how it works, what I can do with it and what to write about it :-)

 

Beware of floating ADC inputs. They may play tricks on you

Last night I was building my next bot, Hammer, and I got to the point where I had all the electronics more or less completed and some mechanics done too. With some help from my dear friend hot glue I managed to build a shaky test platform. I hoped I could test Sharp IR distance sensor and motors. Maybe even do some simple navigation stuff. Here are a couple of pictures how Hammer looks like right now.


Front

Polymorphing a Webcam

Today I decided that my Logitech QuickCam Communicate STX webcam needs upgrades. I got the camera, some polymorph, plumber's tape, hot glue and couple of servos. Let's see what we get when we put those together.

Ooops! I forgot to take a picture of the original camera. If you have never seen a Logitech QuickCam Communicate STX webcam there's some pictures of it at least here. There's might be some pics at Logitech site too but since this is a discontinued model they could be hard to find.

IR phototansistors, sensitivity and RC time constant

Some time ago I had a great idea: I'm going to make two robots. One will be an obstacle avoider and its job will be just wander around with its big head. The other bot will then try to catch it and hit the head with a hammer. Tracking would be done with infrared leds and phototransistors. For the time being I've pretty much completed the first part and posted Head. Head already has infrared leds on its head so next thing would be building an infrared tracker.

Navigate around via ultrasound, avoid some obstacles, play Monty Python tunes
Using a
Meet Head, the big headed robot. Head's life is really simple being just joy and play. Well, for now at least. That may change in (near) future if I manage to get … Read more

Coming up next: Hammer and Head

So, my next robot project has two robots: Hammer and Head. Hammer will have a hammer of some kind and Head will have a big head. Hammer and Head are going to have some fun together. Well at least Hammer will have fun...

Here's a list of updates to help with page navigation (if it ever works):

And now on to business:

All of a sudden I got this strange urge to build a bot that beeps. Don't ask me why. Well what can you do about it? Build one! So here's what I managed to put … Read more

Name attribute gets stripped from anchors

I tried to create a nice list of updates on my blog page here: http://letsmakerobots.com/node/20836

When I edit the page and look at the html source (edit HTML source button) everything seems to be OK. Source looks like this:

-- clip --
<a href="#UpdateJun212010">Update 21 Jun 2010</a>
...
<a name="UpdateJun212010">Update Jun 21 2010</a>
-- clap --

So everything should be ok. But when I view the page the name attribute is missing and the html source (in browser) looks like this: