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» Random Tutorials
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Ap7000 ax-12+
Feb 02, 2010 - 5:52 PM - by Psykoman
Hi,

I hope someone can help me. I have a AVR32 Board from IC-Board (http://www.ic-board.de/product_info....-5inchTFT.html) an want to connect it to a AX-12 Servo but don't know how to do it. Can someone tell me which parts I need an how i have to connect it to get it working???


Best regards,
Psykoman
11 Replies | 317 Views
bad idea?
Feb 07, 2010 - 2:40 PM - by csdude
csdude's Avatar Hi all,

Is it a bad idea to hook up two mainboards (pico boards) to one PSU? (of course one with double the wattage). I know there's a power good wire (and a sense wire, what ever the heck it is that that one senses). Of course the 'power on' signal could be a concern too? (or not?).

btw, I am am setting up a web page (or is it called blog nowadays?)for the progress on my new rover (so far not much progress yet, school started and that kept me kinda busy). If anyone is interested I'll post the link here.

Ron
2 Replies | 161 Views
Question(s) Arduino and SC16A Problem
Feb 07, 2010 - 8:27 PM - by ROBOTMAN
ROBOTMAN's Avatar I am using the arduino to communicate with the SC16A with the SoftwareSerial library. I google looking for code but I only got two results. I used the users manual I found here to create some code.

Code:
#include <SoftwareSerial.h>

#define rxPin 2
#define txPin 3

SoftwareSerial mySerial =  SoftwareSerial(rxPin, txPin);


void setup()  
{
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  mySerial.begin(9600);
  Serial.begin(9600);
}

void loop() 
{
  mySerial.print(byte(65));
  mySerial.print(byte(50));
  mySerial.print(byte(50));
  mySerial.print(byte(20));
}
This seemed like a good start... [Read More]
9 Replies | 182 Views
Question(s) breath sensors
Feb 08, 2010 - 4:53 PM - by Chicagowildcard
I have been looking for a sensor to link to a flash (or director) program that will measure the intensity of of a persons breath. normal breathing versus more intense breathing. Would prefer a device that a person can walk up to and breath on without needing to breath into a tube. The device can measure the intensity of the breath or could measure the frequency within 15-30 seconds the pad is blown on.

Thanks!
2 Replies | 88 Views
Question(s) Need help building this circuit on a breadboard
Feb 07, 2010 - 12:17 PM - by FauxReal
Hey guys,

I've been trying to build this circuit for a few days and I just can't do it. If anybody out there could help me, I would greatly appreciate it. Here is the schematic...

I'm trying to build this on a breadboard.

Again, any help would be greatly appreciated!

Thanks,

Jeremy
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9 Replies | 197 Views
Question(s) A Good Motor Controller
Feb 03, 2010 - 7:36 PM - by ROBOTMAN
ROBOTMAN's Avatar I recently purchased a MD23 motor driver to control my 7.5v 4a motors. After "damaging" my first one and receiving a second one with the same problem I believe I need a new controller. Robotshop the company that sold me my first and second MD23 can't seem to find the solution to my motor controllers problem. I surfed the web for a long time looking for a motor controller with the MD23s capabilities but I have come up blank. What was great about the MD23 was it did PID speed control for me. Also it kept track of my encoder count. I now need another motor controller that can do all of this. I looked around for a long time and could not find anything. A good suggestion on the web was to use a PID devise and a PWM motor controller. Where can I find a PID devise that will work with my quadrature encoders? Or just a motor controller with PID built in? I know I can use my arduino micro controller to read the quadrature encoders and use H-bridges to do the rest but this is not the... [Read More]
8 Replies | 261 Views
HUV Aux Power Board
Feb 05, 2010 - 12:59 PM - by JonHylands
JonHylands's Avatar So, its that time again. I'm just about ready to start production on my new power board, and I want to get some idea of the interest.

Here's what this board does:

- allows you to plug in both wall power (12 volts) and a battery to your bioloid robot
- wall power plug compatible with the bioloid power brick
- battery and output plugs are screw terminals
- when you have both plugged in, it will always power the circuit from wall power, regardless of the battery/wall voltage
- it will auto-disconnect the battery if the pack voltage drops below 9.6 volts (programmable)
- no voltage drop from either wall power or the battery
- open source, on-board ATmega168, Arduino-compatible
- provides a automotive-style blade fuse for output power
- board is rated for 10 amps at 12 volts
- with both wall and battery plugged in, you can unplug wall and it will auto-switch to battery

The board is 1.75" x... [Read More]
3 Replies | 156 Views
New Mech: Nostromo
Dec 19, 2009 - 2:02 PM - by webgeek
Hi all; I've been lurking here for a while and posted a few things but now that my project is seriously underway I figured I'd create a build thread for it. I'll just update this thread as I go with new posts per day of progress. One request - I know I'm not doing some of this the ways others have done it. Please refrain from beating me up too much because I'm not conforming to the traditional approach. If I fail then this will serve as a good object lesson. It's my failure to make after all, not some grumpy person who doesn't like people trying things out of the norm. Basically, nay-saying would be bad though constructive criticism and feedback would be greatly appreciated.

Overview
I'm making a custom chassis'd quadruped mech with dual airsoft guns. The mech will be used in three competitions at RoboGames: Defcon, Mech Warfare (Airsoft), and Mech Warfare (Hardcore). It needs to be working in some form by March 6th as I want to take it to the... [Read More]
101 Replies | 4,239 Views
Small Lifter mechanism?
Feb 03, 2010 - 9:22 PM - by LePaul
I recently bought and love the Lynxmotion pan/tilt for use in my robot.

Now I need to find something small that will lift something vertically. Ideally it would go up 3 to 6 inches. A Google search brought up tons of linear actuators, which are too big and huge overkill for what I need to do.

Ideas? Links?

Thanks, guys!
10 Replies | 327 Views
Looking for advice on sensor output processing
Feb 06, 2010 - 6:27 PM - by shobley
I've been working with a pressure sensor that has a differential output.

It has Vin (9v) Gnd, + out and - out. The range of the sensor output appears to be from 0-0.5v when reading from the (+) and (-) outputs.

Either of these outputs are actually offset by Vin/2 so the output from (-) is 4.5v and the output from (+) varies from 4.5v to 5v.

I'm looking to shift the output so that it runs from 0 to 0.5v in relation to true ground. I only have 0-9v to play with. In theory I should be able to shift the output signal from + down to Gnd using a simple OpAmp setup - but the only way I've done this in the past is with a differential supply.
I thought about splitting the supply with a floating ground, but is there an easy way to do it using the same 0-9v supply I'm using for everything else?

Steve
2 Replies | 131 Views
2010 Scoring System Info
Jan 14, 2010 - 11:34 AM - by lnxfergy
lnxfergy's Avatar The new scoring system is just about ready. We're actually waiting on a backorder on the FSRs and tweaking a few bits of software, but we are now taking orders.

Overview
The scoring system is comprised of a transponder board, and 2-4 scoring plates (1 scoring plate per leg on the robot).

The transponder board is mostly the same as last year's. The board has undergone a few revisions before being released for retail as the MINI Robocontroller. For Mech Warfare contestants, we are offering a special, subsidized "Target-Only" configuration of the MINI, that will not have motor drivers or unneeded headers, for $30, assembled and tested. (Please note, for anyone wishing to re-purpose this board after mech warfare, that boards may be either a Rev C/D board or a Rev. E board).

The new target panels will be shipped assembled and tested.... [Read More]
25 Replies | 1,061 Views
Question(s) Code Warrior
Feb 06, 2010 - 2:33 PM - by Stephen Dubin
I am a complete newbie to phidgit programming. I would like to use my Metrowerks Code Warrior develpment software (Release 5) from back when I taught in college. Has anyone had experience with using Code Warrior to program in C for Phidgit. Thanks.
0 Replies | 85 Views
Project Simple Meccano walker
Feb 05, 2010 - 5:38 PM - by Meccano Jay
Meccano Jay's Avatar The simple Meccano walker Project, by Meccano Jay


About:
This is a simple Meccano based servo driven biped. It isn't a perfect machine by any means but it could make for a neat afternoon with the kids or even a cool science project. I thought out, designed, and built the model used for the pics as an example only. The wonderful thing about robotics is that imagination is key! This is just a basic example you may build it exact but I encourage you to modify it to your liking. I do plan to offer some basic software along with the example just to get you walking.


Project:
I set out to design and build a simple functional walking biped with as few servos as possible. I decided on this particular design based on the fact that it only requires 2 DOF to walk. I feel the base design is solid and I also feel any Meccano fan could have this up and walking in no time.
This design incorporates two standard hobby... [Read More]
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Looking for small, tabletop, autonomous robot
Feb 01, 2010 - 3:20 PM - by nibeck
Without getting into a lot of detail, I'm looking for a robot kit that can move randomly along the top of a table and turn around when it gets near an edge. Some specific criteria:

- Very small, hopefully no more then 1-2" high
- Adjustable speed
- Quiet operation
- Power not critical, but something with a little pushing power would be nice

I'm actually using this as a prop, and will be covering the unit with a custom designed skin. Think of an autonomous mouse, or something along those lines. Willing to build, but a kit would be nice too.

Thanks,

_mike
10 Replies | 382 Views
controlling biped brat
Jan 17, 2010 - 6:03 PM - by matterest
is there a way to controll my biped brat through my pc? if so tell me how!
30 Replies | 995 Views
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