Let's Make Robots!

vpn for china

So I've found myself in Shijiazhuang in China and will be here till the 12th June. I can't access youtube or google and I just wondered if anyone might know a decent vpn software to get around the Great Wall.

I downloaded one from cnet but it didn't register and installed some other crap I didn't want. Is there a reliable recommendation or is there no hope of getting normal access here?

Ping Sensor and Led use

Hey guys,

I was wondering if you could offer advice.

I have built the avoidance robot.

I would now like to add to it.

I would like to add leds and 

possibly a speaker, so when the 

robot approaches a wall maybe the leds turn on. When it reverses maybe it beeps.

How would I do this.?

How do I incorperate it into the code. 

By this I mean say for example

If ping distance is less then 5cm then: led on

type of thing?

My coding is practically non existant. I am still learning

Powering Arduino Nano from a 3.7 V LiPo battery

Hi!

I've been investigating about powering an Arduino nano with a 3.7 V battery, but so far I found that 5 V is recommended. However I found some projects online with a 3.7 V (Lipo or not) and working:

 

Do you any have experience with this? Thanks!

My two cents in memory of Lumi

Lumi meant a lot to me, and a whole lot more to this awesome community. Yesterday, I went rolling over past memories of Lumi - his time spent on LMR and other places around the world - and came up with a short tribute to this great person.

It's shocking, but life goes on. We all will miss you Lumi.

My first Bot : quadruped

I just completed my first Quadcopter and was looking for a new project to keep me busy when I came across some 3D printed Quadruped and hexapod chassis'. So now I want to build a Quadruped. I've got two to choose from below..... An 8 servo model [IMG]http://i1254.photobucket.com/albums/hh601/Duhjoker1/Quadruped/D6A66983-2AA0-47CE-8F47-15D51A76EA38_zpshxlz2dap.jpg[/IMG] And a 12 servo model [IMG]http://i1254.photobucket.com/albums/hh601/Duhjoker1/Quadruped/333312B7-1DC4-4FE7-B444-2B5A0C626174_zpsqpjm1so0.jpg[/IMG] I would much prefer the 12 servo model for more articulation.

Building my first Bot: Quadruped

I just completed my first Quadcopter and was looking for a new project to keep me busy when I came across some 3D printed Quadruped and hexapod chassis'. So now I want to build a Quadruped. I've got two to choose from below..... An 8 servo model [IMG]http://i1254.photobucket.com/albums/hh601/Duhjoker1/Quadruped/D6A66983-2AA0-47CE-8F47-15D51A76EA38_zpshxlz2dap.jpg[/IMG] And a 12 servo model [IMG]http://i1254.photobucket.com/albums/hh601/Duhjoker1/Quadruped/333312B7-1DC4-4FE7-B444-2B5A0C626174_zpsqpjm1so0.jpg[/IMG] I would much prefer the 12 servo model for more articulation.

RIP Lumni!

Lutz, LMR name: Lumni is ..dead!

Lumni was LMR member for 4 years and 15 weeks..

Use a mosfet instead of high amp rocker.

I tried to find a larger current rocker switch locally and can't seem to locate anything.  I thought maybe I could use an N channel mosfet controlled by a digital pin (d4) on the arduino to power the 30amps the motor controller needs for the 2 motors.  An additional benefit (I think).  Is that the arduino and the logic side of the motor controller will be powered before the motor voltage/power is turned on.  

flying autonomous drones

What type of software would you recommed for a flying robot arduino,beagleboard,rasberry pi,etc.

servo motor with 360 control

Hi there,

I was wondering if there are servo motors out there that can turn 360 degrees and beyond and still act as a servo motor where it can go to specific position and have holding torque.

Thanks.

NASA Space Apps Global Challenge Winners

Hello LMRians! Hope the robot-making has been going awesome!  

The recent Earthquake has saddened many lives in Nepal. But, we have something to smile about for a while. I along with two of my friends had taken part in the NASA Space Apps Challenge. And I can't believe it, but we won BIG. We were elected for the Most Inspirational Project Award. 

Fire sensing robot

I want to make a fire fighting robot

Which sensor can sense fire?

Free PROFESSIONAL Robotics Conference in the midwest, July 2-3

Once again, I want to bring everyone's attention to my "work baby" at my new job (I developed the website for the Conference on Automated and Robotic Construction of Infrastructure.)  This takes place on July 2-3 in Ames, Iowa and is completely 100% free to attend.  We even provide lunch on the first day.

It may sound kind of dry at first, but some of the topics may be interesting even to those of us not interested in using robots to build roads and bridges:

ICStation 2nd Anniversary Celebration: $0.99 Limited Sale, Site Wide Sale Plus Coupon

www.ICStation.com welcomes the 2nd anniversary now.

To thanks to your kindly support, we had offered $0.99 Limited Sale for the first round.

Please have a check and hurry up to enjoy the offer.

Deals: http://www.icstation.com/newsletter/eMarketing/ics_0514.html

L6203 motor driver

Hi, I'm making an RC car and as motor driver I'm using the L6203.

It has 2 inputs, 1 for pwm and 1 for a bit to choose direction.

But it doesn't seem to work.

Can someone help me with figuring out how I can program it?

My Code

Hi all,

 

I've got my robot working and I'm quite pleased with it, especially as I'm new to programming. I haven't written the code myself. I've downloaded various bits and edited it quite heavily. Non the less, I'd appreciate an experienced eye looking over it and pointing out any mistakes, or where I could be more efficient, etc. Which I imagine is numerous areas.

 

osccon bit, please check if i'm right

I want to set the frequency of my PIC16F1828. 

the chip: http://ww1.microchip.com/downloads/en/DeviceDoc/41419A.pdf

the osccon setup is page 60 to 71.

I want to set it to 8MHz, so with looking at the datasheet I think I need to set the osccon= 01110011 

I'm not sure if I'm right so could someone please verify this?

 

I also have to enable rollover 0.1ms or something around that for my Timer0 function, but I can't find the value that I need to set tmr0 to.