Ray.Edgley's blog

PID Loops

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Proportional, Integral and Derivative or PID control systems have been around for a very long time, but they are still not very well understood.

Recently I convinced Fred to give a bit of a talk on the subject.
Good thing with robots, is convincingthem is just a case of programming them :-)

Here is the video of Fred's presentation.


Walking Robots Series.

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Going back a year or two ago, I post a couple of blogs on the then current state of walking Robots progress out in the community.
At the time, The most advanced, as in it walked was John Stagers robot.

Using Mimicspeech on the Raspberry Pi

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Before we can use Mimic speech with MyRobotLab on the Raspberry Pi, we first need to install it.
The compiled executable is installed with MRL for windows, but not for the ARM based linux install used on the Raspberry Pi.

FPGA's What are they and should I use one in my robot?

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What are they and should I use one in my robot?


LattePanda Alpha and MyRobotLab

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Back in February I back a Kickstarter campaign for what was described as a Single Board Computer with the heart of a Mac Book For the level I supported this set me back around the AU$500.  The campaign was successful, however production had a number of delays,  the result was Thursday 9th of Nov, I received a package containing my brand new Latte Panda Alpha.  Interestingly enough the site that was supposed to show tracking info when it was shipped still did not list that it had been shipped.

New I2C controlled Dual Motor Positioning Controller

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The dual motor controller is based around the Arduino Nano using PWM output to control up to two DC motors and one standard type servo.

Finger starter query

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Hello fellow MRLians

Today I received a query from one of our newer members, but was unable to reply directly.
It occured to me, if one user has the question, then others may as well.

Below is the query and my attempt to answer it.
Chime in if i make an error

Modifying a CYS-S8218 Servo

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The CYS-S8218 is a nice beefy servo boasting a 40Kg of torque, which is very impressive.

However, this servo does come with one limitation; it has only a 90 degree of rotation output.

When you look inside the servo, there at physical stops at 220 degree and the position potentiometer is also rated to 220 degree, this suggest a lot of reserve capacity within the mechanics, and the manufacture wanting to prevent model builder from overloading the servo by limiting the range to a point it will always have max torque available.