Let's Make Robots!

Shelf pins or thingies?

A rather odd question. I trying to make my own (servo) brackets by cutting pieces from CDs. That works pretty well. The problem is getting them attached in 90 degree angles. I believe what I'm looking for is called shelf pins. But I'm not sure. Here are some pics of what I'm looking for:

selecting_shelf_pins_2.gif15758_BP5830180_3.jpge-clec-tech_2055_134370465.gif

Xmos XK-1pin location observation

Heya LMR Folks.

 I wanted to post this out of concern for the people working with the XK-1 and the actual pin layout vs the hardware manual  pin layout so as to avoid confusion and potential damage to the board if you plan to use the power pins(or any of the pins like the rx/tx pins) related to the jtag ports.

The issue is related to the pin 1 location on the board vs the location specified in the HW manual.

the search box

I'm sure someone has thought of this before, but it would be really silly if nobody had:

We're really looking forward to LMR II, but it's a shame the search box is still not gonna work. Have you considered using Google as search box? http://www.google.com/cse/?v They have all the info you need on their pages, and it's free. But you need a Google account.

I've seen it used on a load of pages, you end up with a small Google logo inside your search box, and the result page looks like a normal Google page, but only has hits from your own site and your own logo on top.

Reading USB mouse data in linux - somebody else C app and my python

Here is a slightly modified (added in hs and vs) c utility, and my python version. they will read the linux /dev/input/mouse data and convert it into status and x/y deltas

i noticed my python app seems quite different to the c app. not quite sure - default int()  types in c must be signed, i dont know... my second two bytes for x,y have MSB set if they are negative, but this value is also set in bits 5 and 6 of byte 1 from what my python tells me..

 

comments welcome!

Super beginner

hey guys, any chance i can find a dictionary or a glossary of words and terms used in robotics?? I have just introduced to robotics and i rerally would like to build one of mine own but i know nothing about so i am searching all over the internet i so i can learn...  any chance for a little help?

Questions and XMOS and lasers, oh my!

Oddbot, what's the torque like on those micros of yours? How tough is polymorph at about 3 mm thick? Can it take a fall and be landed on with 5kg without shattering? If possible, can you post a hard-copy of the exact dimensions of your micro?

 Xmos, I GOT MY XMOS!!!!!!! YOU ARE AWESOME!

 

Mr. Basic axles

This one goes out to those who participated in the first Mr. Basic Challenge.

The first batch of kits that DAGU Electronics sent out had some bad parts in it, and DAGU was quick to replace those parts, and the problem is fixed on the later releases.

 Now I wondered if anybody got 4 replacement wheel axles (2 fronts, 2 backs) and kept the old ones? You see I need those old ones...

So if anybody is willing to post'em to Norway, I'd be really grateful.

rocket challenge

please keep working on your rocket challenge

 

IRobots Soft Morph locomotion - Jamming

How is this for new organic like movement for your bot.

URL :- Soft Morph Locomotion

also link here :- chembot

Problems with 18f252 port A and port B

I wrote a simple program with MPLAB for my PIC18F252.

Program:

 

CONFIG WDT = OFF ; DISABLE WATCH DOG TIMER

CONFIG OSC = HS   ; USE CRYSTAL

 

org 0 ; START CODE AT 0

START:

CLRF TRISA 

CLRF TRISB

CLRF PORTA 

CLRF PORTB

 

MAINLOOP

MOVLW B'11111111'

MOVWF PORTB ; MAKE ALL PINS 1(HIGH)

MOVLW B'11111111'

MOVWF PORTA ; MAKE ALL PINS 1(HIGH)

 

GOTO MAINLOOP

END