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136  Using Arduino / Project Guidance / Re: Smart Grocery Cart on: September 06, 2013, 04:01:15 pm
I don't think any stores would be interred in such a product as they would probably lose a lot of money if people have a live up dated price. It would be better if it gave them the total at the end.

Also how about vision tracking? Could you use a camera to see what gets put in the cart? Maybe a weight and camera combo?
137  Topics / Robotics / Re: leap motion controlled robotic arm with Processing and Arduino on: September 06, 2013, 02:05:35 pm
That is amazing! I have that same robot arm and I'm trying to figure out how to control it better. Right now I just set the servos to go to a certain point. What do you do?
138  Using Arduino / Project Guidance / Re: Need Some Advice On Simple Robotics Project on: September 04, 2013, 01:56:26 pm
If it can be done with legos you can do it with an Arduino.

Watch the video and look at ALL OF THE SENSORS they use!


139  Using Arduino / Motors, Mechanics, and Power / Re: Arduino armwrestling video-contest! on: September 04, 2013, 01:46:22 pm
Why not set a build cost classes. 

You could have an under $50 and under $100.
140  Using Arduino / Project Guidance / Re: Need Some Advice On Simple Robotics Project on: September 04, 2013, 09:06:16 am
I would not use a motor shield. I would buy 2 dual motor drivers. Also wait until you pick out your motors so that you buy one that can handle the current. How are you building the robot. From scratch? From a kit? And using dead reckoning is hardly ever a good Idea on a Robot. Use sensors!

Also I'm curious what competition this is.

Best of luck!
141  Using Arduino / Motors, Mechanics, and Power / Re: 1000 servo installation on: September 04, 2013, 07:56:44 am
That is going to be tricky. With the servo control below you could potentially control 512 servos off of a mega. You might need more then one Arduino.


https://www.sparkfun.com/products/8897
142  Using Arduino / Project Guidance / Re: Measuring current draw? on: September 04, 2013, 07:51:24 am
Would this work?

https://www.sparkfun.com/products/8883

Edit:

Looks like we posted at about the same time. Anyway your link is broken.
143  Community / Bar Sport / Re: Is there such an Arduino Christmas Kit available on the market? on: September 04, 2013, 07:25:33 am
No kit but a simple google search helps

http://www.instructables.com/id/Arduino-Christmas-Light-Controller/

http://www.neonsquirt.com/arduinoxmas/Arduino_based_8_Channel_Christmas_Light_Controller/ArduXmas.html

http://forum.arduino.cc/index.php?topic=8720.0
144  Topics / Robotics / Re: Advice on a robotic intravenous cart that automatically follows a patient on: September 03, 2013, 04:14:56 pm
This might get you started…

http://www.trossenrobotics.com/p/RoboTurret-Vision-Tracking-Starter-Kit.aspx

Also, It looks like it would work with Arduino.
145  Topics / Robotics / Re: Advice on a robotic intravenous cart that automatically follows a patient on: September 03, 2013, 02:56:11 pm
Why not a vision sensor that track were a person is moving and follows them? The raspberry pi might work better for this project… 
146  Using Arduino / Motors, Mechanics, and Power / Re: Servo Burning Hot and not working. on: September 03, 2013, 10:34:43 am
The servo I dropped in was not pushed in all the way. After I pushed it in it works fine now. I still don't know why the first servo stopped working and got hot and yes I tested to make sure the wires were right.

Quote
If a servo is prevented from reaching its target position mechanically it keeps full power
flowing through its motor

That can't be the issue as the new servo works just fine unless the servo loses  torque over time. The servos are the same kind. The servo must have been the issue as the programing and wiring is correct. Thankfully its just a cheap servo not one of the expanse ones. I will just assume that it had issues.

Thanks for all the input.
147  Topics / Robotics / Re: What motor should i buy on: September 03, 2013, 09:57:11 am
Ok so I checked around and this motor is with in you budget and it should work…
http://www.robotshop.com/solutions-cubed-easy-roller-robot-wheel-ezr2-1.html?lang=en-us


And if you use this battery….
http://www.all-battery.com/sidebyside12v4200mahexpandablenimhbatterypackmodules.aspx

And this motor driver…
http://www.robotshop.com/productinfo.aspx?pc=RB-Dfr-19&lang=en-US

You SHOULD be able to drive your robot around for about an hour. The acceptation would be if your going up hills or what not. Then you will not have as long as run time.

It seems like it would go fast, but I'm not sure how to do the calculations so somebody else will have to comment on that. This is probably the best motor for your price range. If you want more speed/torque your going to need to go up to $75-$100 per motor.
148  Topics / Robotics / Re: What motor should i buy on: September 03, 2013, 09:34:11 am
You  left out the most important part… the battery and the incline! If you want your robot to run for an hour we need to know what battery you plan on using or how much you will spend on a battery.

Also for under 75 it will be hard to find what you want… but I will look.
149  Using Arduino / Motors, Mechanics, and Power / Servo Burning Hot and not working. on: September 02, 2013, 09:21:31 pm
Hello, I'm woking on a project and one of my servos is having issues. Everything was working fine with this servo… I push a button and the servo claw closes if I don't press the button it stays open. Now I put my Arduino and button in a wooden "box" I made and now the servo will not close it just stays almost open and gets near burning hot. At first I thought I did something work with the button, however, I checked an the Arduino can read when the button is pressed or unpressed. I know the code works fine as I never uploaded anything new on the Arduino and the rest of the servos work great. The only thing I can think of is that the servo got damaged. During earlier testing I exposed the servo to 10volts for about 30 sec (not on purpose), however, it did not have any issues working after words. Could the servo just be at the end of its life? Has anybody experienced this issue before?


EDIT:

I just dropped in another servo and it stays in the same half open position yet it does not get hot. I have know Idea what is happening.
150  Community / Bar Sport / Re: Syria… What to do? on: September 02, 2013, 08:08:12 pm
Funny you would say that. He is actually a 80 year old general who is and always has been very anti democrat. He is a republican and has even run for some political offices (as a republican). He just thinks that the middle east is not something we should have gotten involved in.
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