Archive for June, 2008

Cables for DorkbotPDX Programmers (updated for benito7g and dorkboards).

Friday, June 27th, 2008

In the course of the Arduino Cult Induction series and the group purchases, I have evolved several versions of the DorkbotPDX programmer and released them into the wild. Unfortunately the pinouts for the programming cable have evolved with the programmers so the cables are unique to each. With the batch of programmers we just purchased this will settle down Though the pinout may not make sense in this particular case it will be the same for at least 1000 boards.

Here is a quick guide to cables for the DorkbotPDX programming boards for the rbba and the dorkboard.

Benito7 rev G
(1000 Currently being released into the wild)

Benito7 rev a
(26 known to be in the wild 16 from Sunstone 10 hand rolled)

Cables for the benito7 should look like this.

Winston (rev3) — hand rolled,

(at least 50 known to be have been released into the wild)

The winston board was my first usb to serial programming board.

Rapha Race Controller

Tuesday, June 24th, 2008

Rapha Sportswear has a stationary race controller prototype that they need replicated for an event next week. The first step int this process was to break out the original design into 3 boards one for input processing one for the stepper drivers and one for the processor itself. Since the customer wanted to be able to modify the code themselves in the future and expand the system an Arduino or Wiring compatible board will be used.

(The completed project)

Motor Boards

The motor boards consisted of 4 darlington transistors on the best performing heat sinks I could find.

The I/O – Processor Board.

The I/O Processor board consisted of to schmidt triggers to clean up the input and a usb to serial connection for programming and future use. The board also has 3 free ports for future use.

Once More With Feeling.

Monday, June 16th, 2008

http://www.dorkbotpdx.org/files/cultinductionrev2.jpg
more information at http://dorkbotpdx.org/workshop/arduino/cult_induction_rev2

RSVP to DDelmarDavis at gmail.

Happy Birthday to Me!

Thursday, June 12th, 2008

I am old. I won’t say how old exactly but I am half way through a few experiments. Life, work.

It makes me very happy that three of these experiments will be funded as Tempus Dictum Projects.

  1. The Dorkboard.

  2. The Benito Serial Programmer

  3. The Arduino Cult Induction Series.
    (Next Induction Sunday June 22)

I would like to thank Tempus Dictum for the opportunity to work on these items.

I am a very lucky man.

Happy Birtday to Me!

Thursday, June 12th, 2008

I am old. I won’t say how old exactly but I am half way through a few experiments.

Three of these experiments will be funded as Tempus Dictum Products.

  1. The Dorkboard.

  2. The Benito Serial Programmer

  3. The Arduino Cult Induction Series.
    (Next Induction Sunday June 22)

I would like to thank Tempus Dictum for the opportunity to work on these items. I am a very lucky man.

This is clearly Jasons Fault.

Tuesday, June 10th, 2008

See I can bend things

Write Locally Post Globally

Tuesday, June 3rd, 2008

I like wordpress.

It allows me to do much of what I post on the web without having to look at the underlying html and still letting me at the html. In fact I use WordPress to to post on Dorkbots Drupal pages. It is easier than hand rolling html and the new wordpress saves your drafts. This is no small issue: As I was reminded at 2:30 monday morning as Drupal timed out the session that I was writing on and ate my post. Between that and the Eagle files I was working with I lost most of sunday nights sleep. The other issue is portability.  So last night I ran up mysql, unpacked the latest wordpress into my home directory and reconfigured the apache daemon that comes with leopard.

I plan to get more done and loose less sleep.

The Really Really Bare Bones Arduino

Tuesday, June 3rd, 2008

This has been reposted on dorkbotpdx.org

A few weeks ago I bought the last of the Really Bare Bones Arduino rev A boards from Brian at Wulfden (http://wulfden.org/freeduino/freeduino.shtml) I now have enough boards for one more workshop and then we have to reevaluate the boards which are avaliable. Pictured below is a finished board from the first “Arduino Cult Induction Workshop”

In addition to letting me clean out his new old stock Brian threw in one of the “Rev B” boards so I could check it out. Unfortunately I don’t like it.

The new board is almost 3/4″ of an inch longer than the original. Most of the new space is dedicated to room for a power jack and a regulator. Things that I never use. The design is supposed to allow you to cut the power jack off as well as the regulator. Notice in the finished board above that their is space for a big old reset switch. When the original Arduino came out you had to reset the board to get it into the bootloader. However in the past year or so all the new boards have been using the dtr signal run through a capacitor to pull the reset line so the switch is wasted space. The original board made up for this space by adding ample ground and supply connections. The new board adds another 1/8″ and gets rid of these.

As I was grumbling about this Mark Gross suggested that I just roll my own.

So we are back to the drawing board. Above is my pen markup of the changes that I wanted to see done to the original Really Bare Bones Arduino and below is the draft of the rework to scale with the RBBB rev B.

Now comes the fun part The cost of goods sold and a business case.

The (Really) Really Bare Bones Freeduino

Monday, June 2nd, 2008


(this is part of an ongoing DorkbotPDX workshop series being sponsored by TempusDictum, Inc.)

A few weeks ago I bought the last of the Really Bare Bones Arduino rev A boards from Brian at Wulfden (http://wulfden.org/freeduino/freeduino.shtml) I now have enough boards for one more workshop and then we have to reevaluate the boards which are avaliable. Pictured below is a finished board from the first “Arduino Cult Induction Workshop”

In addition to letting me clean out his new old stock Brian threw in one of the “Rev B” boards so I could check it out. Unfortunately I don’t like it.

The new board is almost 3/4″ of an inch longer than the original. Most of the new space is dedicated to room for a power jack and a regulator. Things that I never use. The design is supposed to allow you to cut the power jack off as well as the regulator. Notice in the finished board above that their is space for a big old reset switch. When the original Arduino came out you had to reset the board to get it into the bootloader. However in the past year or so all the new boards have been using the dtr signal run through a capacitor to pull the reset line so the switch is wasted space. The original board made up for this space by adding ample ground and supply connections. The new board adds another 1/8″ and gets rid of these.

As I was grumbling about this Mark Gross suggested that I just roll my own.

So we are back to the drawing board. Above is my pen markup of the changes that I wanted to see done to the original Really Bare Bones Arduino and below is the draft of the rework to scale with the RBBB rev B.

Now comes the fun part (not) The cost of goods sold and a business case.