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We taught a workshop on how to create interactive art with the Arduino platform at the Mill Valley Library on October 24, 2015.
We showed 9 students how to make lights blink, sounds play, motors move, and how to add more color with neopixel LEDs, as described in this online guide we created for the workshop:
At the end of the workshop, we asked participants if they would like to this again, and the answer was a resounding yes! Participants told us they learned a lot from this workshop and would not only come back for future workshops, but also recommend this program to their friends.
Instructors for this workshop were Donald Day and Fabrice Florin, with support from Natalie and Jean Bolte. We are all members of Pataphysical Studios, the art collective behind the ‘Pataphysical Slot Machine’, our poetic oracle.
Come visit the exhibit this month! We’re open every Saturday and Sunday in October, from 1 to 5pm, in the downstairs conference room of the Mill Valley Library.
Special thanks to the Mill Valley Library and the Friends of the Library for making these workshops possible — especially Kristen Clarke, who helped us get the Arduino parts and set up for the workshop.
View more photos of the exhibit: www.flickr.com/photos/fabola/albums/72157659147117739
UPDATE: You can see a proven and working implementation on this gadget.
Not visible [D'oh!] Red solders to Female DB-9 connector pin 2, Green to pin 3, and Black to pin 5.
I looked around some and there is a Freeduino schematic available which suggests that I should have 1kOhm resistors between the Arduino and the Max232.
The schematic (http://spiffie.org/electronics/archives/2008/03/08/Duino232-2.html) also suggests bringing out DTR to the reset line via a 104 capacitor for the auto-reset capability.
I tried this but wasn't successful. I believe the problem, though, is my USB-RS232 adapter. I will try to find another one.
UPDATE: I have since been quite successful and have even demonstrated the ability to download code, with a working auto-reset via DTR. I think this image has some caps reversed and no resistors between the arduino and the MAX232. I strongly recommend lifting the connections from the Freeduino-Serial schematic.
My Arduino USB from 2005 toured India with me when I was lecturing at Pune, Bombay, Bangalore, NID ... The USB connector was opposite as it should so I cut a wire and solder the cables straight to the board
finally, it's here! time to get back into my basic hardware experimentations i used to do with STAMP years ago...
from www.arduino.cc/:
What is Arduino?
Arduino is an open-source physical computing platform based on a simple i/o board, and a development environment for writing Arduino software. The Arduino programming language is an implementation of Wiring, itself built on Processing.
Arduino can be used to develop interactive objects, taking inputs from a variety of switches or sensors, and controlling a variety of lights, motors, and other outputs. Arduino projects can be stand-alone, or they can be communicate with software running on your computer (e.g. Flash, Processing, MaxMSP.) The boards can be assembled by hand or purchased preassembled; the open-source IDE can be downloaded for free.
An Arduino clone (a Freeduino-SB from Solarbotics) powering a dual-digit common cathode 7 segment display using two 74HC595 shift registers. I can control 16 LEDs with only three Arduino outputs.With the two additional 74HC595 ICs I can drive the next two digits, all from the same three output pins.
maplemuse.wordpress.com/2011/05/13/shifting-bits-with-ard...
I purchased my first Arduino last week and have been having a lot of fun with it. Before embarking upon my intended project I thought it might be worthwhile characterising the digital outputs a little. It's also been quite a while since I did any real electronics so taking it slowly is probably a good idea.
First question: What voltage is used for the HIGH level?
// Set all pins as outputs with HIGH level, and leave them there
void setup()
{
for (int p=0; p<15; p++)
{
pinMode(p, OUTPUT);
digitalWrite(p, HIGH);
}
}
void loop() {}
After running this sketch, I measured the voltages at each digital output pin relative to the GND and AREF pins. Pins 0 - 12 had voltages 4.96/4.94V (GND/AREF). Pin 13 was the odd one out reading 4.89/4.86V. Not a big difference. Possibly due to the fact that pin 13 is also driving an inbuilt LED on my Diecimila.
After modifying the above sketch to set all pins to LOW, I re-measured the pins' voltages. Pins 2 - 13 had voltages ranging from 1.9/2.9mV and -0.2/0.7mv. Pin 1 was 3.4/1.1mV and pin 0 was an outlier with 80.6/78.4mV for LOW.
The sketch from which the above photos were derived simply toggled the digital output between HIGH and LOW at a fixed interval:
int p = 13;
int del = 10;
void setup()
{
pinMode(p, OUTPUT);
}
void loop()
{
digitalWrite(p, HIGH);
delay(del);
digitalWrite(p, LOW);
delay(del);
}
The value 'p' is in milliseconds. When it's set to 10ms, then a whole cycle takes 20ms which is the period of a 50 Hz signal. The oscilloscope in the above photo has it's time axis set to 5ms, and you can see that it takes approximately 4 units (20ms) to complete a cycle. The y-axis is set to 0.1V/unit, but then my probe amplifies by 10x. Notice the peak-to-peak amplitude of the square wave is slightly more than 4 units, which matches up with my earlier measurement of HIGH = 4.96V.
My multimeter is unable to read the oscillating signal. Instead it drifts about at the approximate midpoint, 2.5V (bottom right).
From here, I went on to try some higher frequency testing...
A new version
A new version of the venerable Arduino Breakout Shield.
More info at make.rrrf.org/ab-1.4
Adafruit Arduino Enclosure white with a Diavolino, data logger shield, i2cspibackpack, and a breakout board for four 6mm tac switches. forums.adafruit.com/viewtopic.php?f=25&t=20199
Protoshield mated with the arduino board. I didn't put a header on for the outside three pins of the ISP.
This is the connector part of my Arduino/4051 multiplexer based midi controller, using trs jack cables i dan connect small boxes with extremely simple electronics inside (voltage dividors) to controll the universe, or at least a small part of it.
Arduino Word Clock with minute resolution of time in words and linear display of seconds.
There are also modes for digital clock, analogue clock, temperature & humidity, & also three games, Game of Life, Simon & Tetris.
The clock can be stand alone or run as a slave off a Master Clock if required.
In stand alone mode the clock runs off it's built in temperature compensated real time clock with an accuracy of ±2ppm from 0°C to +40°C
When running as a slave off a Master Clock time is synchronised on every 30seconds past the minute.
Summer/Winter time is also automatically adjusted by one of my Pragotron Master Clocks on the BSTin (D7 Nano) pin.
A manual switch can be added instead if quick summer/winter time change is required.
There is an option for PIR control so the clock automatically turns off when no one is in the room.
The Clock measures 500mm x 500mm weighs 12lb (5.5Kg) and is designed to be wall mounted.
There are touch pads in each corner to setup and control the clock.
A mini USB socket provides brightness information over the serial port and also allows software programming in situe.
home.btconnect.com/brettoliver1/Word_Clock/Word_Clock.htm
Arduino conectado a una placa entrenadora con unos cuantos sensores de presion (botones) y LEDs, forman el juego de Simon dice
Info sobre arduino: www.arduino.cc/ y www.arduino.cc/es/
$9 ARDUINO and a Piezo buzzer plays shave and a haircut. The code for this is from the ARDUINO software download.
yes, trip to maplins this lunchtime, back with a boatload of electronics bits and bobs for my basic foray into physical computing.
beyond that, i also cannibalised an old logitech USB controller to get at its two analog joysticks and the shoulder buttons.
We taught a workshop on how to create interactive art with the Arduino platform at the Mill Valley Library on October 24, 2015.
We showed 9 students how to make lights blink, sounds play, motors move, and how to add more color with neopixel LEDs, as described in this online guide we created for the workshop:
At the end of the workshop, we asked participants if they would like to this again, and the answer was a resounding yes! Participants told us they learned a lot from this workshop and would not only come back for future workshops, but also recommend this program to their friends.
Instructors for this workshop were Donald Day and Fabrice Florin, with support from Jean Bolte and her daughter Natalie. We are all members of Pataphysical Studios, the art collective behind the ‘Pataphysical Slot Machine’, our poetic oracle.
Come visit the exhibit this month! We’re open every Saturday and Sunday in October, from 1 to 5pm, in the downstairs conference room of the Mill Valley Library.
Special thanks to the Mill Valley Library and the Friends of the Library for making these workshops possible — especially Kristen Clarke, who helped us get the Arduino parts and set up for the workshop.
View more photos of the exhibit: www.flickr.com/photos/fabola/albums/72157659147117739