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walter

MAKE: Walter II is a Machinist's Masterpiece

Chris the Carpenter's Walter II is a machinist's masterpiece! See more on MAKE...

Ladies and Gents, may I introduce, "Walter II" (Walter II is this year's "big project" going with me to Maker Faire NYC 2013) In the style of the orginal Walter, I … Read more
  Well, it's about time for another Walter Update. Busy Busy. I won't (and can't) describe the many, many hardware changes --or to the point, the transition from … Read more
Ah, the chaos of life... A lot has happened in the the last couple months. This is neither the time nor the place to rant about personal issues or work or money or … Read more

Hehe, found something funny on youtube!

Hi everyone,

Whilst roaming on youtube, I found this kick-ass vid about CtC's first atempts at programming a PicAxe microcontroller... Little contrast to what he is up to now with Walter :p

N-joy

The Pulse - 2010w07

LMR on the Brain
Sensing the living LMR community since 2008w43.

Flash!

Pulses are sparse and they shoot by in the blink of an eye. Make sure you have your automatic trigger set up and armed. Or you will miss it.

Walter Line Follow

Just a quick look at the beginning of my line follow set up...

High signal from pic to pic w/(2) pwr supplies?

So here we go:

Walter has (2) 7.2v  packs, one for data and one for servos. Each has a switch and can be turned on idependantly (manually). During the "start-up" routine, I need the main picaxe to know if and when the servos have been turned on. It would be like this:

I turn on the main brain. The LCD turns on and displays a message to tell you to "turn the servos on, please" --I need the main brain to know when you have turned them on. 

Well, here we go... Please watch the video, it explains a lot.  ******Already an Update.... sigh****** I forgot to add some baby … Read more

Clean navigation using IR sensor

Anyone willing to give me a hand with this code please feel free to jump right in.

I have spent any hours trying to get this to work. I sure have gotten closer but the bot seems to get stuck n reverse for whatever reason. He will stay in reverse untill i bring my hand close to the sensor and then move it away very quickly.

He then continues forward. Sometimes it seems like he wants to turn toward the object he sees

Picaxe 28x1 with sharp GP2D12

I have made many changes to Fritsl's code, Some changes I understood and others I did not.

 

 

Slightly more advanced LDR eye

Read this history first, if you have an hour to kill.

The challenge: make your bot rove around your house. Use no active beacons. Use observations by your bot only. Now, does your bot know where it is?

One possible answer: an eye and a brain.

Room Recognition

Each room in the house has a unique lighting situation. A simple eye that looks around in eight directions would "see" a pattern of light and dark segments. Each cell is connected to one ADC on your uC.

Walter Update

Walter has been stripped down to a bare chassis...

Walter is being painted.

Damn, I'm getting close.

I just got another order of PCB's delivered, ones that I designed. New 3A power boards, IR beacons, on-board battery chargers but most importantly, an AWESOME new … Read more

The Pulse - 2009w39

LMR on the Brain
Sensing the living LMR community since 2008w43.

Belated

Remember kids: once your robot is posted on LMR: it stays there. For ever. Come next Christmas, Pesach or any kind of New Year, LMR will still be hosting the pictures your shot, the video you edited and the very words you wrote.

"May I Go?" Navigation

So I have coded Walter, when in RC mode, to do a sonar sweep and put the results on my LCD screen. At each servo position, the distance sensed is displayed as sort of a bar graph. There are 16 servo steps on the sonar sweep corresponding to 16 charicter spaces on the display. This is exactly the same system as Frits' "See what robot sees" just with a lcd screen instead of on the pc screen. This system now allows me to drive around and point Walter at different situations, a doorway, a chair, straight into a wall etc.

*** Update 9.27.09 *** BIG UPDATE BIG UPDATE BIG UPDATE!!!!  Well, it has happened! Walter has gotten his voice... I was a bit surprised however, he is American … Read more

I'm getting sick of Sharps --Is there something better?

Alright, this is it... I am anti-sharp distance sensor. I spent over a week fighting noise on the power side which screwed with my RF reciever. I have fried them because thier pin-out does not match the configuration of a servo connector or the picaxe 28x board. Thier numbers jump all over the place. Now it seems that all four of the ones I have are "worn-out". By that I mean this:

Cheap PCB's

You know, I just gotta plug Sparkfun again...

So I finished designing Walter's new main board (now set-up like a 28x board with all servo connectors) and was shopping around for cheap "only-one-board" PCB people. Once again, Sparkfun rocks! --They do 2 sided boards with all the trimmings for only $2.50 a sq. inch. There is a $10 set-up fee but I just got an email back and learned that is per order... You can have as many different designs per order as you want!!! Hell yeah!

By the way-- Here is Walter's new brain(s)

LDR Cyclops - holding, scanning, seeking, recalling

Continuation from here.

Video straight from the camera to Youtube (Sorry Oddbot).

scans.gif

 Continued here.

Free Range Robots (IR Beacon) **UPDATED**

**Update 4.14.09***

OK, when you watch the video... 

First of all, it is like, 5 minutes -sorry. There is a point though promise, and that point starts at about 3:40 or so. Now, I can't stress enough, the code is wicked chunky as it was written in about 10 min. It is all "bang-bang" and not proportional at all. The final code should be about 10x faster, much more accurate with a lot less trial and error. For now, this is just proof of concept and indeed it has been proven. 

 

Rudimentary LDR eye

Old idea rekindled

This idea about very basic robot vision haunted me ever since I first saw AmandaLDR. Even before it was named after a canine. It's somewhat inspired by the evolution of the first eyes in nature: just a bunch of light sensitive cells on your rump.

Free Range Robots (and hallways)

Uff-da... So I have pulled the training wheels off of Walter and am letting him rove around sans fences. I have actually had great luck with pre-solving a lot of problems (table legs and driving under things) but still I am running into a few problems.

I ask this as an open question.

After many, many tests and trial runs, I have started cleaning up Walter's electronics and mechanics to a state that is a little bit closer to what it will be when … Read more