Let's Make Robots!

raspi

Using PiFace but still using I2C

I got a PiFace Display in the mail not too long ago, and just cracked it open.
I got it as a tester to write a review, because I wanted the LED display and the infrared on it.

Reads back content from the Shout Box
UPDATE: Added files and blog about the project. It has been a dream of mine to have the Shout Box read to me so I can feel like there are people of my ilk hanging … Read more

Cheap yet relative accurate signal sensors

Thanks for visiting the nuthouse!
Anyhow, I'm trying to figure out a relatively cheap, yet accurate, distance-sensative sensor.

So, the end question is, does anyone know of a sensor type that can be mounted on an arm,
that moves from 0 degrees to 180, 6 inches apart, to detect my location by something I'm carrying?

-From what I've read, the standard RFID chips don't usually even cover 5 feet.
-I've tried bluetooth, but the sensor strength fluctuates too much for a clear reading,

Grab objects, navigates via user input
Using a
My first claw robot. Found the first version claw from SparkFun in a box - totally forgot I ordered one over a year ago. After a long process of dealing with how … Read more

Interfacing motors from RPi with PicAxe

I've successfully hooked up the my RPi to my Picaxe for interfacing through this link:
http://www.instructables.com/id/PICAXE-Raspberry-Pi-ADC/

I can successfully return the variables from B1 to my RPi.
However, I'm new to Python and  basically want to get started by writting motor control.

Motor just buzzes, no movement

I'm trying to follow this tutorial:

http://myrobotlab.net/tutorial-control-a-dc-motor-with-raspberry-pi/


Now, while I'm not too familiar with Breadboards, since I dont have one, and can't afford one right now, I've had to take it into my own hands to carefully solder wires between the points. I seem to have everything done, but when I start the program, the motor DOES start a buzzing sound (don't hear it when the program is NOT running) which indicates I'm at least partway right.

 

So my questions are,

Read RFID tags from the Parallax RFID reader on the Raspi
How to connect the Parallax RFID Serial Reader to the Raspberry Pi safely. Using a Logic Level Converter from SparkFun to step down the 5V serial from the reader … Read more
Detects human face and navigates toward face, stopping at a certain distance away from the face
Using a
OpenCV on the Raspberry Pi detects human faces. I modified the script to move the robot left or right based on the coordinates of the detected face so that the face … Read more
This bot originally had an Intel Atom netbook for the brains and Wifi connectivity. Replaced with a Raspberry Pi for a smaller footprint and efficient power … Read more
Using pi-blaster to get 8 PWM channels on the Raspberry Pi GPIO to control the two drive servos. mjpg-streamer for the video stream. Source code github link. You … Read more