Let's Make Robots!

Grownups only

"Gigahoes."  I've only watched the first one.  Not Citizen Kane but there are a few good laughs.  (5yr+ LMRians will know how my tastes run.)

GY-521 and motion in a straight line

Hello all

I have a few questions about using GY-521 MPU-6050 gyro. If you have experience - please, help. 

1) Different sources indicate different allowable voltage - 3.3V or 3.3 / 5V. Can I use it with my 5V Arduino?

2) Is GY-521 enought for motion in a straight line of such platforms as dagu 4wd/6wd wild thumper?

Many thanks in advance.




cooling fan 2

Hi LMR wizards,

I'm wiring a cooling fan into my robot, it's a 5v fan and will be blowing air across my voltage regulator's heatsink. The regulator is used to supply power to my servos, some LEDs, etc.

As far as my knowledge extends, a DC motor shouldn't be powered from the Arduino, without using a motor driving circuit, as a motor can feed back electrical power and damage the chip. I don't know if this is still the case, if it's just running from the Arduino power, or only if running from a pin?

Servos maxing out

Hi, I recently got some servos online with intention on making a spider bot controlled by an arduino. I've connected them up to a seperate power source (4x AA) to the board and with the first set of 3 no problems. But as i've gone to add more they started acting rather strange. When I apply power to the servos they sometimes all max out try to go beond their limits, if I disconnect the power from the servos and board and restart they sometime works, but only for a short amount of time before going back to maxing out.

How to build a Arduino room to care a flagging tree scientifically?

Here is a flagging tree in our office, but due the busy work and the room are not suitable for the tree’ s growth, it is flagging now. I read a short elecrow blog about a project making use of kinds of crowtail modules that aims to collect the data of the tree such as light strength, soil moisture, temperature and humidity of this tree. In this way, people can know the current situation of the tree and then take actions accordingly. 


Dagu Rover 5 PWM Settings

Hey All,

So I've been building a rover using a (Dagu) Rover 5 Chassis, a Rover 5 Driver Board and an Arduino Uno.

It's wired up fine and I can send instructions back and fourth to the motors no problem but what seems to be an issue is the speeds which the motors are turning at. If I can set the speed at 100 (i.e.

Adding a Raspberry Pi Camera to Elf the Robot

Robots are a lot of fun.

Robots that stream video over WiFi are even more fun!

Elf Raspberry Pi Robot @ http://Mikronauts.com

(click on image for larger version)

robot stores at canada near Ottawa

Does any one knows some robot store that sells some microcontroller and so on


G-code Slic3r error: Existing work directory required?

Dear: LMR

Hello guys this is Noah again. Recently I have finished the software on my Prusa I3 where I am following the directions for how to print something and nothing happens when I slice with slic3r. Instead this image appears.

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.