Ephraim & Sadie Hatfield
We Invented Art.
Not For Sale Opening Event
Posted by Ephraim Hatfield on August 02, 2010 at 08:56am
Video of the opening event.
Sadie & I would like to thank everyone who came out for the opening of Not For Sale. Sorry we did not make it! After working all night to complete the installation we slept through our alarm clock. Silly us! Matt & Marianne of Greylock Arts told us it was a delightful time. And from the video above, it looks like it was.
Dr. Dan Rose has provided us with our favorite quote about the installation so far, “Your Not for Sale is spectacular and evocative. A ground breaking electro-digital retro anti capitalist funny moment storefront fun house.”
Not For Sale will be up through October 31st at 65 Main Street in North Adams, Massachusetts. Thanks to everyone who helped make this possible!
Put On Your Party Shoes (And Don't Forget Your Cell Phone!)
Posted by Ephraim Hatfield on July 29, 2010 at 03:57am
Tonight is the night that Sadie & I unveil our interactive storefront window installation, Not For Sale! Stop by 65 Main Street in North Adams, Massachusetts between 6 and 9pm to see it all first hand. Be sure to bring your phone so you can call in and make things move. And there’s more! Not For Sale is just one small piece of the art event that is DownStreet Art. Get down.
Posted by Ephraim Hatfield on July 27, 2010 at 02:47pm
Sadie & I have been amassing large quantities of old toys so that we can modify them and hook them up to motors for use in our upcoming installation. Here is a shot of one of our toy piles. That’s it for now.
Posted by Ephraim Hatfield on July 23, 2010 at 04:14pm
Just a quick update to show how we’re progressing. Sadie has completed the cut-out figures and attached servos to them. They will move about when someone calls in. Above you can see how they look in the space.
Space & Time
Posted by Ephraim Hatfield on July 16, 2010 at 05:56pm
We have completed most of the custom electronics, the motors and other parts have for the most part arrived, and the printed materials based on Sadie’s drawings just came in. So we are starting to transition from working in the studio to working in the space at 65 Main Street in North Adams, where the installation will ultimately reside.
The first order of business was to cover the icky gray chipboard floors with something that looks a little more like the entrance of an actual store. I’m also going to install some shelving and some pegboard. Sadie will be busy mounting her drawings and attaching servos to them for the next few days. I’ve also started programming. In addition to some Asterisk AGI scripting, we’ll need some software on the Arduino boards, and some “glue” to tie it all together.
Posted by Ephraim Hatfield on July 15, 2010 at 02:36pm
Sadie & I scored this box of old products the other day from a hardware store that has been closed for years. It was exciting to go through there and see products that have literally been sitting on the shelf for 30+ years. It was as if we had found a time machine. We plan to sprinkle this old stuff around the installation to help give it some atmosphere.
Getting Technical at Bascom Lodge
Posted by Ephraim Hatfield on July 13, 2010 at 09:34am
Matt & Marianne of Greylock Arts gave a technical lecture on our behalf at the Bascom Lodge at the top of Mount Greylock on Monday night. They discussed the Arduino platform, custom software and circuitry, motors, as well as the Asterisk server software, all of which is being used to develop our upcoming interactive installation Not For Sale. Thanks to everyone who attended. And many thanks to Peter Dudek for hosting the event at Bascom!
Knee Deep In Hot Solder
Posted by Ephraim Hatfield on July 10, 2010 at 04:34pm
We finished up the design of our DC motor controller boards a couple days ago, and now there is just a lot of wire stripping and soldering that has to get done. It’s not very sexy work, but it’s gotta get done, and it’s not the kind of work that does itself. The boards consist of an Arduino, a USB Adapter, and 3 H-Bridges. They’ll each control 6 motors bi-directionally, or 12 motors in a single direction. I spent a long time agonizing over the design of these boards. But in the end, and after consulting with friends Larry Alice and Chris Cerrito, I decided to keep it simple. We’ll be using the L293D, an H-Bridge IC that can drive 600mA per channel, less than the regular L293, but the D version features internal clamping diodes, which keeps the circuit simple, and allows me to fit everything on a single Radio Shack PCB. An H-Bridge is a circuit which allows a voltage to be applied across a load in either direction, and this allows you to reverse the direction of an attached motor.
Posted by Ephraim Hatfield on July 08, 2010 at 11:58am
One of the first stages of the prototyping process for me is to build a Cheapduino, which is basically an Arduino compatible chip on a breadboard. I find this easier to work with than the official full size Arduino board, or even any of it’s smaller cousins. It’s also really inexpensive. All the necessary parts, not counting a breadboard or printed circuit board, could cost you as little as $6. For less than $5 you can get an Atmega 168 from Digi-Key. You will probably want to bootload the Arduino firmware onto this chip to make it easier to program. To do that you need a USB AVR Programmer like the $22 USBtinyISP from AdaFruit Industries. You’ll also need a standard Arduino Duemilanove or Diecimila board for bootloading, or you can bootload straight to your breadboard by using a AVR Programming Adapter. Or you can get the Atmega 328 already bootloaded from SparkFun for about $5.50, but you will have to use a crystal. More on crystals below.
And now, a couple quick notes about choosing a bootloader. The Arduino has several types of bootloaders. The one you choose will depend on how you’ll be building your breadboard Arduino. If you’re not going to be including a 16 MHz crystal, you should use the Lilypad Arduino bootloader. That’s because the LilyPad operates without a crystal, and at 8 MHz. If you’re building with a crystal, you should opt for the Arduino NG bootloader. The NG bootloader has a longer pause at startup than the Duemilanove or Diecimila bootloader. This longer startup is useful if you are working on a breadboard, where you will most likely have a manual reset button. Newer Arduino boards, like the Duemilanove or Diecimila have an automatic reset, and as a result a much faster startup time. The longer startup time of the NG just makes it easier to coordinate reprogramming your chip from the breadboard.
Other parts you may need, depending on the specifics of your circuit include: a 50¢ 5v Voltage Regulator, a 26¢ Momentary Switch, a 7¢ 10k Resistor, a couple 25¢ 22pF Ceramic Capacitors, and some 8¢ 10uF Radial Capacitors. You may also want to consider a $20 Arduino Serial USB Board or a $14 Breakout Board for FT232RL USB to Serial. Either of these will allow you to program your breadboard Arduino directly on the breadboard. You can also program from a standard Arduino board, and then drop your chip into the breadboard. These USB devices also allow to send and receive serial data. And because they are modular, you can share them between boards.
The startup costs can be high, especially since you may need to buy a breadboard, a USB AVR Programmer and a Serial USB Board. But once you get the basics, you really can build Arduino compatibles for as little as $6 each.
For further details, here’s a great tutorial by Carln Maw & Rory Nugent on building your own breadboard Arduino. And here’s an Instructable. The design I use is simplified from the above in some respects. It doesn’t make use of a crystal, or any capacitors, but the those tutorials are a great place to start. Oh, you’ll also want to have this Atmega 168 pinout handy.
Some of The Characters
Posted by Sadie Hatfield on July 06, 2010 at 10:37am
So the weekend was busy, busy, busy with drawing. These are some of the characters that will appear in Not For Sale. We’re going for a 50’s, sort of retro look. Our good pal Zannah Marsh is taking the drawings to the printer for us. Thanks Zannah! They should arrive here sometime next week. Then we can mount and attach them to motors.
The work of Ephraim & Sadie Hatfield is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.