Let's Make Robots!


The new droid from Star Wars. Whoever makes one first wins at LMR this year.

Laser wood cutting

I'm working on outfitting a shop in an RV. I've been told that the noise from things like a table saw might be enough to get me kicked out of an RV camp so I'm looking at alternative ways to cut wood. Right now I'm looking at cutting up to 3/4 inch plywood and 1" of hardwood.

Would an affordable laser cutter (say under $10,000) be able to cut these types of wood?

I need to be able to cut up to a sheet of 8' by 4' plywood or maybe up to 8' of normal wood.

Is this a doable thing? Is it quiet?

GSM/GPRS module and arduino


I've just bought a gsm/gprs module named GTM900b and

this module has an option that when you give "A/" to it it'll repeat every command

you sent to it ...and when you want to get rid of it you shall need to reset settings 

for resetting the setting you've to use this command : "ATZ0"

I used it for the first time and it worked ...I became able to take "HUAWEI OK" and "GTM900B OK"

but just for one time ....I cannot use it anymore and I've no idea what the problem is :(

can anyone help me with that ? 

Arduino Uno R3 Refusing Upload

After a very long absence, I have finally returned. I'll bet none of you even remember me!

Anyway, I got  a new Arduino Uno R3 yesterday in the mail. I installed Arduino Software 1.6.3 (latest stable release) and tried to upload the Example sketch, Blink.

It compiles fine and finds the board fine. But when it comes to uploading, it always get's stuck. It never gives me a message telling me the upload is completed. The progress bar always stops at about 80%. I have been letting it sit like that for about an hour now.

Any ideas?

Can't upload a script to my Arduino mini

I just received my first Arduino. I hooked up a pro mini Atmega 328 to a breadboard along with a mini Usb adapter.

I read all the directions on the Arduino site on how to hook both of these up and followed the recipe HERE.

This is what it looks like.

First arduino setup

Changing Polarities on DFRobot 2A Motorshield

How to change to polarties of the motor shield to change the direction of the shaft? DFRobot's 2A motor shield has only 1 IN ang 1 EN for each motor.

From what I've learned, to be able to switch directions, you need to change the polarities. Is there something I am missing?

Support me on my trip to Space

I am currently competing for the Hackaday Prize 2015. The grand prize is a trip to space, a dream (yes, just a dream) since my childhood. You can support me by following me and giving my project 'skulls'.

Thank you, LMR!

Issues with my nozzle (Whey!)

I am having a bit of trouble with my 3D printer at the moment, and thought I could gain some wisdom from our 3D printing geniuses (plural?) here on LMR.

My extruder keeps blocking, I am using PLA, printing at 190 degree's, with a hotbed of 57 degrees

The printer is a makerbot replicator 2 clone, called the duplicator.

Seckill Activity: ICStation Atmega328P UNO R3 Dev. Board $7.00

ICStation New Seckill Activity is ON now.