pir sensor with a Mini Maestro

oldfarmhand's picture

Hello All

can someone help me with a sketch on a mini maestro. all im trying to do is detect motion with a pir sensor and  start servos to move in a mini maestro sketch wiring the sensor is no problem nor the servos The problem I have is how to add the sensor to the sketch, Im not sure how to identify the sensor or how to write it in

any help would be apreciated

2nd leg video

harland's picture
On the first leg video I used Makeblock 37mm 12 volt DC motors bought at Radio Shack
 when the stores closed. The gear motors were 12v with 4.5 Kg-cm rated torque, 
50 rpms. They were hooked to a Parallax DHB-10 motor driver board.  The newest 
leg video I changed the motors to Actobotics 116 rpm @12 volts from Servo City. 
Rated torque 11.5 Kg-cm., 100 rpms.  These motor are faster, have more power, 
and have encoders.  The Parallax motor driver board I used supports encoders.  
The black parts are printed in Matter-hackers nylonX at 30% fill and the 

MrlComm and the importance of Auto-generated Code

GroG's picture

Ahoy !

When you have maintain the same message structures with different languages, it sometimes is advantageous to GENERATE CODE ! rather than write it.

MrlComm has messages we want to be encoded and decoded in both Java & Arduino C++, and perhaps more languages or encodings.

So we make "One Document To Control It All" -> arduinoMsgs.schema

Robot Security, Internet, Viruses and Hackers

Kenn's picture

Hello All,

I have been thinking about my robots security and how I have seen people hacking into cars and driving them away. I have also seen how many people are connecting their robots to the internet to ask what the weather is, what the sports score is and so on. Plus they now passed a law that allows IP's to sell your privat info. And lets not forget about the Cloud it's out there some where I don't know.

So the question is do I really need or want my robot to be connected to the internet or wifi?

Raspberry PI + OpenCV on latest

kwatters's picture

So, it seems like the upgrade of OpenCV to version 1.3 has busted the OpenCVFrameGrabber on the RasPI3.  Where, I don't have a fix for this issue yet, I do have a work around for the problem.  Here's the steps to get OpenCV working on the RasPI3 on the latest build  (until we sort the javacv 1.3 issue.)

made leg that was on Thingiverse

harland's picture

I built the leg Thomas Mindach put up on Thingiverse.  Still needs work, but having fun making it.



MRL install loop

Mats's picture

There is a question asked by Luis R in the InMoov forum about how to get started. He follwowed the instructions from here:


At  6/ Click START_INMOOV.bat and wait a little

Quick Speech Test with MyRobotLab

GroG's picture

Here is a quick tutorial to play with speech synthesis in MyRobotLab.

Step 1 - install Java
Make sure you have Java 8 on your machine, you can download it from here