Let's Make Robots!

Terms and Conditions - V2

Dear LMR Friends and Family:

Yesterday we sent our new (first!) terms and conditions (T&Cs) for the LMR website (outside of the Marketplace, which was already governed by T&Cs) to all LMR members.

We’ve received mixed feedback. While most of you recognize the need to put T&Cs in place (when RobotShop recently purchased the site these were not in place), some feel that some of the conditions are a little heavy. Others have misinterpreted the scope of the T&Cs and RobotShop’s intent. 

Threads and postings vanishing?

I had started e.g. this thread: http://letsmakerobots.com/5800mah-2s-25c-lipo-dagu-rover-5-power-distribution and there were a few answers to this and now they are all gone. What happened here? I can see it in the subsciptions but not in the forum anymore.


I know that there were more threads where I posted and more answers because the answers triggered emails. Many of these are missing now.

Serial how to's arduino/pololu

Ok i hope some one can help me. What i need to know should be simple.

Im trying to get a pololu Maestro 24ch servo controller to accept serial commands from an arduino nano wired to PS2 wireless controller head. Using pololu's arduino/pololu scriptino example.

Here is the scriptino code that is added to the pololu script screen....

/* This example shows how to control Maestro scripts with an


5800mAh 2S 25C Lipo for Dagu Rover 5? Power Distribution?

I am setting up a Dagu Rover 5 plus 4 channel motor controller plus  Spider
robot controller plus Rasperry Pi.

The power supply from 6 NiMH batteries will not be enough for my Dagu Rover 5.
So I was looking for LiPos.
Found this one:
 ZIPPY Compact 5800mAh 2S 25C Lipo Pack
Capacity: 5800mAh
Voltage: 2S1P / 2 Cell / 7.4V
Discharge: 25C Constant / 35C Burst
Weight: 273g (including wire, plug & case)
Dimensions: 159x16x45mm
Balance Plug: JST-XH
Discharge Plug: 5.5mm Bullet

Wild Thumper woes with VNH2SP30 controller

I bought a 4WD Wild Thumper after building three different robots successfully with a mix of Raspberry PI and Arduino and the L298N motor controller which is obviously not up to the current draw of the thumper motors.

This lead me to the VNH2SP30 dual controllers. I have bought 2 both of which give a different amount of current in forward and reverse - whether used with a small salvaged DC motor (500mA typical draw) or with the wild thumper motors. I am using a 2 cell LiPo 20-30C.

Wild Thumper, progress but help/advice requested

Hi all,

I had a lot of trouble with motor driver boards and my Wild Thumper 4WD chassis - in the end I bought a more expensive motor controller said to handle 60A. I am controlling the paired (left/right side) motors by PWM signal and  it now drives forward/backwards/left/right etc.

TTL byte packet from PS2handle through Arduino to activate Maestro 24

Working on a hexapod and bought a Pololu Maestro24 for my hexapod robot. I want to be able to control it off-line using a PS2 handle running through an Arduino Nano to the pololu. I found Bill porters site that connects to The curious inventors site that has some good info like how to wire the PS2 handle to an arduino and the sample code needed to program the arduino to understand the PS2 handles commands. There is also a pololu\arduino library.

Ive compiled the sample code and uploaded it to my arduino and im pretty sure it works.

Question about Dagu 4 Channel motor controller

As pointed out in
the frequency of the PWM for the motor controller might be an issue.

I am using this motor controller:
Dagu 4 Channel 5-12V, 2A Brushed DC Motor Controller
actually it looks a bit different:

but I assume that both are the same.