Mini-workshop “Motores de Passo”

(scroll down for Eng­lish)

Vamos pegar aleatóri­a­mente num motor de passo e ten­tar desco­brir que tipo de motor é, desen­har um dia­grama sim­ples do mesmo.
Depois vamos pegar no ferro de sol­dar (não há que ter meeeeeedo :)) e mon­tar um cir­cuito que per­mite con­tro­lar esse motor a par­tir de um Arduino ou qual­quer outra placa baseada num micro­con­tro­lador.
Todo o mate­r­ial é fornecido e fica para os par­tic­i­pantes, sendo ape­nas necessário trazer ferro de sol­dar e mul­ti­metro (ou esperar que alguma alma cari­dosa vos empreste).

O número de par­tic­i­pantes é lim­i­tado pelo que, se dis­serem que vêm, con­ta­mos MEEESMO con­vosco 😉

Para inscrições e pedi­dos de infor­mação: work­shops /arroba/
Lotação máx­ima de 10 par­tic­i­pantes
Sábado 13 de Março de 2010
Alt­Lab em Cacil­has

Let’s each of us pick up a ran­dom step­per and try to find out what kind of step­per it is, draw a sim­ple dia­gram.
Then pick up the sol­der­ing iron (have noooooo fear :)) and assem­ble a cir­cuit to con­trol that motor from an Arduino or any other micro­con­troller-based board.
All mate­ri­als are sup­plied to the par­tic­i­pants and every­one gets to keep them; you’re just required to bring your own sol­der­ing iron and mul­ti­me­ter (or wait a ran­dom amount of time to bor­row some­one else’s).

The num­ber of par­tic­i­pa­tions is lim­ited, there­fore, if you tell us you’ll come, we’ll REEEALLY be wait­ing for you 😉

For reg­is­tra­tion and infor­ma­tion requests: work­shops /at/
Max­i­mum of 10 par­tic­i­pants
Sat­ur­day, March 13 2010
Alt­Lab @ Cacil­has

Drum Pads



Four drum pads ready to go.

All made of old mate­r­ial found in the Alt/Lab instal­la­tions, and a very spe­cial big thankxxx for Mónica who brought the cas­ings (we are going back to that in a moment) for the drum pads.

So the idea was to make drum pads that we could hook up to a sound card(or what­ever) and them make sweet music, this is a very nice com­bi­na­tion between piezo­elec­tric com­po­nents and a few lay­ers of some absorbent sound  mate­r­ial like rub­ber or cork foil (that’s what we use because there was noth­ing more) and a piece of alu­minum foil for a greater drum area .

We use an old can (20l) of paint, four piezo­elec­tric found in elec­tronic junk like old modems and old tele­phones, wire for con­nect­ing the piezos, cork foil for insu­la­tion the drum pad area and Mónica sup­ply the cas­ings (square rub­ber cd´s stands), and glue for putting every­thing nice and tight .

First we cut a piece of the can (cir­cu­lar about 10cm radius)and we glued the piezo into it, then we drilled one hole into the rub­ber cas­ing for the wires to came out, them we cut two square cork foil parts (the first in the bot­tom of the cas­ing and the other for the top) a bit of glue and that’s it drum pads ready to rock.

Now we got some audio com­ing out of the pads but thats just bor­ing because its always the same and we want to go fur­ther like trans­form­ing audio into midi mes­sages, and we found the right tool for it, its called  “KTDrumTrig­ger” and he trans­forms the audio sig­nal into midi notes, we can use this midi notes inside a sequencer pro­gram to con­trol any kind of instru­ment (either VSTI or some other stuff), in our case we use the drum pads to con­trol “Bat­tery” and thats it instant fun.

There are some other links and some other ideas for drum pads. This “one“uses ardunio as a source for the imput sig­nal.


PAPERduino’s design

This is a fully func­tional ver­sion of the Arduino. We elim­i­nated the PCB and use paper and card­board as sup­port and the result is.. the PAPER­duino 😀

This is the the first ver­sion of the lay­out design, next we will try more designs, and other mate­ri­als. You just need to print the top and the bot­tom lay­outs, and glue them to any kind of sup­port you want. We hope that you start mak­ing your own boards. If you do, please share your pho­tos with us, we would love to see them 😉

There is no USB direct con­nec­tion, so to pro­gram the paper­duino you will need some kind of FTDI cable or adapter. One of this prod­ucts will be fine:
FTDI cable from Adafruit Indus­tries
FTDI adapter from Spark­fun

Down­load PDF

Com­po­nents list:
1 x 7805 Volt­age reg­u­la­tor
2 x LEDs (dif­fer­ent col­ors)
2 x 560 Ohm resis­tors (between 220oHm and 1K)
1 x 10k Ohm resis­tor
2 x 100 uF capac­i­tors
1x 16 MHz clock crys­tal
2 x 22 pF capac­i­tors
1 x 0.01 uF capac­i­tor
1 x but­ton
1 x Atmel ATMega168
1 x socket 28 pin
Female and Male head­ers

Use a nee­dle to punc­ture the holes for your com­po­nents.

Don’t rush, place one com­po­nent after another and do all the sol­der work care­fully.

Fol­low the con­nec­tion lines.

And this should be the final look of your paper­duino con­nec­tions.

openMaterials :: research project

My dear friend Kisty Boyle and I recently launched open­Ma­te­ri­als — a col­lab­o­ra­tive research project ded­i­cated to open inves­ti­ga­tion and exper­i­men­ta­tion with DIY pro­duc­tion meth­ods and uses of mate­ri­als. In the spirit of the open source soft­ware and hard­ware move­ments, we hope to pro­mote mate­ri­als to be researched and devel­oped in a pub­lic, col­lab­o­ra­tive man­ner. We see mate­ri­als as an open resource, and wish to estab­lish an open process for explor­ing and shar­ing knowl­edge, tech­niques and appli­ca­tions related to mate­ri­als sci­ence.

I’ll be con­duct­ing most of my hands-on research right here at Alt­Lab. We’d love for you to be involved if you are work­ing in these areas or inter­ested in learn­ing more about smart mate­ri­als.

Paper and cardboard circuits

A cou­ple of years ago i found out on the “inter­nets” that you don’t really need a pro­to­board or a cir­cuit board to make your cir­cuits come to life, the idea was to fold a piece of paper with the cir­cuit design in it (com­po­nent side and cir­cuit dia­gram side) and then insert­ing a piece of card­board in the mid­dle.

The main idea was the eco, recy­cled “thingy” since cir­cuit boards are not so eco friendly and take a bunch of time to get recy­cled by our mother earth, also the eco­nomic side (paper and card­board are almost free), instead cir­cuit board­ing takes a long time and it’s haz­ardous for the envi­ron­ment.

So here’s what i do :

1- print the schematic you want (be sure to include on the sheet of paper both sides of the schematic (com­po­nent side and schematic)

2-fold it (the idea is to fold where the com­po­nent side meets the schematic)

3-cut a piece of card­board and insert it in the mid­dle of the sheet of paper

4-glue both sides on to the card­board (now you must have a beau­ti­full cir­cuit board made of card­board)

5-with a nee­dle pierce (com­po­nent side) all drilling holes into schematic side

6-insert the com­po­nents (resis­tors, ic, capac­i­ta­tor etc..)

7-turn it back (schematic side) and start to sol­der (be sure to folow the traces on the paper), the best way to do this is to sim­ply bend the leads of the com­po­nents and sol­der them together, if you have a large area were the lead is not long enough just use a wire or some­thing sim­i­lar.

8-have fun