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Doodle Doodle Doodle: An LED Etch-a-Sketch
The official Doodle Doodle Doodle video. Great job putting this together, Leslie. What a fun project (now that it’s all over.) I’m forgetting the tediousness already. 80 LEDs housed inside ping-pong balls. Two potentiometers control X and Y movement and a reset button, uh, resets everything. On the code side of things, the Y control lights different lights on a shift register and the X knob selects one of ten shift registers. Yay.
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Doodle Doodle Doodle in action.
Building the Doodle Doodle Doodle. Ten 16 pin shift registers with 8 LEDs each. I now consider myself proficient with the soldering iron. Also featured: duct tape for when you just don't give a shit anymore.
Final Project: LED Drawing Game
For our final project in VIA147A, we are thinking about producing an electronic drawing game that is similar to a lite-brite and an etch-a-sketch. We will build a grid of LEDs and provide ways to turn them on and off. Right now, we plan to address the LEDs using a shift register. We will most likely have to string a few of these together, each one can only control eight LEDs. The interface for our project will have two potentiometers for X and Y control of the “active” LED. The active LED will flash so the user can tell where they are about to draw. There will be a button that toggles the active LED on and off. By moving the active LED around and setting LEDs on or off, the user can draw a picture. There will also be a reset button that turns off all of the LEDs. If we have time, we make do this using motion sensors - we’d like to do a “shake to reset” feature similar to the original etch-a-sketch.
We have talked about adding diffusers to the LEDs to make them a little more interesting. Right now, we are looking at putting a ping-pong ball over each one. We will make a self contained wooden box for the whole thing and have a 5V power supply.
This weekend, we are getting together to see how it goes addressing different LEDs and turning them on and off. It it works, we will move ahead planning the box and control interface.
Awesome guest lecture by Jessica Kedziora last night. You have to see this thing in person to appreciate the details. It looks like a little scale model.
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Bass String Picker: V147A Midterm
A pick attached to a servo arm steadily picks notes on the E string of an electric bass.
The code is pretty straight forward. It’s built off of this sweep function. I modified that code to read a 10K pot and pass that value to the function as a delay in between sweeps. The arm always sweeps at the same speed, but depending on the setting of the potentiometer, it waits for 0 - 1023 milliseconds between swings. This controls the tempo.
Once the servo arm was moving back and forth, I tweaked the left and right extreme values to center the picking action over the string.
I had to modify the pick a little bit: the servo was not strong enough to move the heavy Fender pick through the string, so I had to make a more flexible cardboard extension for it.
The Code
Donna Haraway, A Cyborg Manifesto, 1985 response.
I found it interesting to have an analysis to a science fiction concept that have been referenced several times but it has never been analysed with such level of detail and depth. Also, if we compare the time when this was written and the advanced that we have accom[plised now, we can observe that the line between human and machine is blurring in a different way that we expected. In Haraway’s section “Informatics of Domination” we can observe a comparison between the concepts that will and have evolved from hierarchy domination to the Informatics of Domination. I find this section very accurate to the world we are living now. We are concert about information to be a incredible valuable resource which has power and control over our lives. Perfection is no longer something we seek to achieve, we now look for optimization of the existing systems. Can we make things faster, larger and better has been the motto to a lot of the new problems that we are looking to solve. In my opinion, it was a really interesting reading and made me thing if the concept of cyborg is really a futuristic machine/human hybrid or a regular current individual who is attached and controlled by technology.
The Love O Meter from the Arduino Project Book
