Let's Make Robots!


add.pngSubmit Something else Did you make something else? Show us


UNIO memory breakout board

A few weeks back I aquired some memory chips(samples rock). These are the special unio memory chips, essentually 1 wire for both input and output. As this is an 8 pin chip with only 3 of the pins being useful, I decided to try to make a simple breakout board with some small 5x5 hole pcb boards I grabbed from SF. These unio chips can be used with the20x2, 28x2 and 40x2 and the three pins are vcc, vss and I/O. The chip id is 11aa040(4k memory)

As recommended, I've added a small pullup resistor to the board. This is the results of...

Soldering Iron Score

Yup, found it at a garage sale for 3 bucks! --Nice little upgrade from my $7 radio shack iron!

Designing the new body for my robot...

The first robot that I have ever made currently has a cardboard body. As one can imagine, cardboard has its limits, both in durability and aestetics..  So the last few weeks I decided to look around for another material... I wanted something that is relatively easy to form and work with and not needing a whole set of new, special, tools... I came across plexiglass as an alternative and my choice was quickly made.

AXE023 The Secret Data

I am calling this THE SECRET DATA because i could find no explanation of the four terminals on the bottom of the board.  I did find a forum where someone asked but the picaxe support person didn't answer that part of the question.

They are connected to ground.

     Another thing worth knowing is that it as not compatible with the motor command in Logicator.(the flowchart programing gui)

Sketchy businesses -- my 3D parts modelling log...

Well, currently there's not a day that goes by without me reading someone talking about 3D printing, 3D printers and whatnot. Also, I've been reading of how easy SketchUp is to work with, so given my failure to make anything of Blender around almost 10 years ago... I decided to give SketchUp a try.

Note: Newer designs are at the top (for chronological reading start at the bottom of the post)


02 - Second practical motivation:

BaseBot – Basic Robot Kit v1 Specs

Basebot is a simple Open Source Robot platform which intends to provide a good balance between price and performance. We want it to be as a base platform for boards like Raspi , Olinuxino , Carambola etc which can be mounted on top of it and they can control it serially. But it should be completely usable in standalone mode also.We did not provide any mounted sensors as we want users to use it as a flexible experimentation platform , while it takes care of simple robot like functions.

Club Jameco Entry

Well I submitted an idea for club jameco.

It's a kit which you solder and connect sensor wires and servos

the sensors are attached to a glove and are connected to the soldered board, and the servos make up the robotic hand, I designed the PCB.

The only thing I don't understand is should I include the glove and the robotic hand with the kit or should I let the person use their own glove and make their own robotic hand.

COSMA - Update 2

For the first protoype of COSMA I decided to build stackable proto shields for the Arduino Mega. Later I will layout a single PCB, including all.

Proto shield one

Proto shield two

BoB the Biped and Me: BoB gets a 'hawk, naturally.

In general news: The Rev. B boards have been taking a tour of San Diego. Looking at the ZIP codes provided by the tracking info says they're getting closer. They might even be here tomorrow, who knows.

So with that nonsense going on I figured I might as well dig into fleshing out ole BoB here. I wanted to add more team spirit and I thought getting hair in a Mohawk style was a no-brainer, right? And in team colors, with the more modern team pallete using darker blue and neon green:

Looking for ideas on a I2C Pan/tilt stand-alone sonar

This quest to build a stand-alone I2C pan/tilt range finder controller started with an article here by Ladvien.  In    http://letsmakerobots.com/node/39130, Ladvien explores using an ATtiny85 (84) as an I2C motor controller...

And in http://letsmakerobots.com/node/39222,   Chris the Carpenter   gives us an awesome pan and tilt code example... so...

Project 2: Tidying up

Last two days have been frustrating - work has prevented me from working on developing my skills.

I did, however, manage to shorten the huge loom of wiring that came attached to the motors; there was a little board with 6 straight-through connections already attached near the motors on the base, so I soldered the 2 wires of each motor, plus the battery wires, to one side. The other side i continued the connections to the motors shield.

Dawn of a New Era

Well after many years, aproximately 14 to be correct, I am venturing back into the world of Hobby Electronics and Robotics. I have always been interested but over the past 14 years have focused on technolgy and computing rather than Robotics (not enough time for all the hobbies that I would like).


Reverse engineering OWI robot arm

Ok i got to play with a OWI robot arm, so i tried to hack it with microbrains.
The arm is driven with 5 dc motors and a light.
It's connected to a digital controller trough a 8pin ribbon cable.
the connections in the ribbon cable are
0 left + vcc
1 base rotate left/right
2 1 segment up/down
3 2 segment up/down
4 3 segment up/down
5 pincer open/close
6 light on/off
7 right + vcc

connecting 1,2,3,4,5,6 to 0 makes the first action; connecting 1,2,3,4,5,6 to 7 does the opposite action.

Marketplace at Let's Make Robots running well


Las week I purchased a propeller at the Let's Make Robots Marketplace and it works great. Here is the picture of what arrived, also a Pixter X Platform module board!


Purchased at Let's make robots Marketplace

Autonomous navigation Robot

I'm trying to make a robot able to navigate autonomous though GPS waypoints. 

So far I've read and seen tutorials for individual hardware and trying to understand how it all works.

Next step will be to try and program something that will work.

Hardware I've
An adafruit ultimate gps.
micro sd card and breakout board for micro sd card
A HMC5883L compass sensor breakout board

In the meantime...

Nearly a month since my last (and first) post, I thought I'd post again to show that I haven't disappeared completely.

Recently, I've been trying to get my electronics up to speed.  So I've been following the excellent, extensive documents at http://www.allaboutcircuits.com/ - if you export them as PDFs they make a great substitute for books.

Qwerk control with processing

So I was doubly inspired by Chris the Carpenter's recent experiments with robot control via processing, and f5pql's heavily-equipped qwerk-based robot to do some more tinkering of my own. I'd been programming the qwerk for autonomous operation through the SimpleRobotClient, and controlling it directly through the telepresence DiffDrive client, but was beginning to wish I could somehow construct a hybrid of the two. But building a client from scratch - or even just tweaking the existing ones - looked scary!

What's Inside

IMG_0083.jpg   IMG_0084.jpg

Upper Right: On/Off button  Centre: Head shell  Upper Right: Bulkhead with contact arcs

Lower Right: Bezel.                                          Lower Right: On/Off switch & pc

The contact arcs mate with two contacts on battery compartment (below)


Bluetooth Dongle Comms

This is an Open Source, Collaberative project blog.

The aim is to use commonly available Bluetooth USB dongles to enable a PC to control a free roaming robot.

In my case the missing link which I have been trying to get working since about 2001.

The idea is to have an autonomous PC controlling the robot remotely (WITHOUT A CONNECTING WIRE ), so that I can test some rather radical Artificial Intelligence ideas that I have.

Arc Point Art

Well, I had some fun in the attachment. I would take a sheet of flexible circut stuff, and charge my 24Joule Capacitor bank. i would then short out the points between the plate and the wire, vaporizing the copper at the point, creating a black spot. In the attachment, I spelled KL!, mostly because I diddnt have that much to mess with :)

 I was thinking of doing LMR next :)