Let's Make Robots!

chopsticks spider robot

hello everybody,

my graduation project is the chopsticks spider robot and i have a red back spider robot controller and its need a PCB but i don't have any idea about PCBs anyone can help me because we have 28 servos with 7 V  input battery and 4 IR sensors...

Thanks in advance..

serial between two picaxe

am having a strange issue  getting the 28x2 to communicate  with a 14m2

the 28x2 Tx code here http://pastebin.com/RtDvA4Sk and the 14m2 Rx code here http://pastebin.com/54KeXDaf

now the 28 Tx works as expected but the 14m2 Rx is not, it appears to go to the subroutine as it shows its recieved the data but in the terminal window no values are displaced. any and all ideas welcomed

Propeller QuickStart Boards on Sale at RadioShack

Apparently RadioShack is putting their QuickStart boards on sale for $19.97. The normal price is $35 (possibly more at RS).

I know I'll be checking my local stores for boards (though I don't recall ever seeing a QS locally).

In case you haven't heard, the Propeller is a great microcontoller to use with robotics.

LMR morès and web etiquette

tl:dr-If you violate our sense of order with (commercial) rudeness, you earn our rudeness in return.  Not saying it's right or wrong-just what to expect.

Raspberry Pi Home Automation

I have begun work on a home (or rather room) automation system using a Raspberrry Pi as its hub. I am aiming for 3 primary functions:

     1. accept commands for interface device (ex: recieve instructions to turn lights on and off and do so using GPIO and servo)

     2. accept requests for sensor data (ex: recieve a request for temp. sensor data(GPIO) and respond by relaying data)

     3. collect and transmit large collections of data to be interpreted by interface device (ex: sleep datalogging)


Movable head without pulling wires

I'm working on a small form factor turret with a movable head.  The design has a camera (w/ raspberry pi) on a spherical mount that can rotate altitude and azimuth directions.  Unfortunately, since its a turret, it must be able to twist infinitely without getting its wires tangled.  Any ideas?  I've been thinking about a laser based system, but I seriously doubt that that is going to be able to transfer enough data to stream video.  Anyone have a simple suggestion that hopefully keeps everything hard-wired?  

T'REX robot controller


The T'REX robot controller makes controlling robots easy!

The Arduino compatible controller comes pre-programmed with sample code that lets you control it with a supplied Android app, Radio Control or with an external controller via I²C.


Fiberglass/Plywood panels

This might be in the wrong forum, if so, I apologize.

I'm doing a major re-design of RT, and trying to figure out a way of making more professional looking panels for the outside.

Mainly, the current method of laser-cut plywood shows off the grain after painting.  I want to get rid of that.  I've got a few options.

1 - Laser cut acrylic (expensive)

2 - CNC routed PVC sheet (moderately priced, will have to outsource to a friend)

How many sensor is needed for a line follower?

Line followers use 2-8 reflectance sesnsors for detecting the line.


This product has swift movement and turns, it uses 5 sensors 3 in middle and 2 on sides, but does the middle one is neccessary in any way? Or does it is just consuming one extra ADC pin?

I am looking for a perfect sensor array for line following robot.

New Univeristy Project

Hi Guys,

I'm totally new here but wanted to ask some advice, we have been tasked to create a robot to carry a coffee cup over a certain distance without using power! Well electric or wind up? What can we do?