I wasn't really into this week because it's a difficult transition between BiOCHROMES and E-TEXTILES aha
But I was impressed by some representations/ performances.
Louise showed us this incredible danse group.
Having fun at Oullins' House where we tried to put a light..... but It didn't work! We are still searching for the good way of creating the circuit aha very relevant!
I was inspired by the educative and intuitive part of those games. I would like to create something for kids, to help them developing their senses. I learned how to have fun with kids with e-textiles : makeymakey
What I remember from the tuto and think is important :)
- Electrons flow = Current —> measured in AMPERES = A
mA = milli amperes
- Battery gives the reasons to the electrons (positive and negative) to move —> in volt = V
- How can you measure volt —> with a multimeter
TIPS : When you don t know which side is the negative and the positive one in a battery (something with volt), try with wires of the multimeter and if it's a positive number it's the positive electrons and vice versa.
- A schematic = representation of the elements of a system using abstract-graphic symbols
Circuit = close loop in which electrons can travel in —> I need a power source (a battery) and traces (wires)
TIPS : DON'T DO SHORT CIRCUIT TO AVOID FIRE, DON'T CONNECT YOUR 2 TERMINALS TOGETHER = create a load (= any component that allow current)
How do you know if a material is conductive : multimeter and continuity mode —> “ol” mode —> if the curent runs, you're going to heard a noise —> good when you want to check if there is a problem somewhere in the circuit. If the multimeter is not put on the good place, we are gonna see “ol” like if it s 220 ohms you can t put the button on 200
Resistors = impede a flow of current and impose a voltage reduction —> measured in Ohms = Ω ￼ Higher is the resistor —> lower is the current Lower is the resistor —> higher is the current
- LED (light emitting diode) = family of Diodes —> the current can flow in one direction, from positive to negative
The longer leg of the led = positive (anode)
The shorter = negative (cathode)
Link to LED Resistor Calculator
Battery 9V —> R > 470 Ohm (if I put a < resistance, with the time it will damage the led) 5V —> R > 220 Ohm 3V —> R : pas de R
We use them to generate and electric signal (a change of voltage). So how the sensors work ?
- Digital switch : on/off, only 2 states
- Analog switch : Dimmer switch + according the pressure, the switch will resist and the intensity of the circuit (energy/light) will vary.
Velostat fabric with conductive wire
- Momentary switch : you have to stay press to active the light --> like Diane’s switch
Useful links and inspirations for e-textiles' utility¶
Tutorial : Arduino uno software¶
Input/output pins we can :
- Read voltage
- Control voltage (like with the multimeter)
GND= ground pin 5V/ 3.3V = power
Breadboard = support for making temporary circuit and prototyping (legs of the led on the same column, not line)
- Wire on the 5V —> other part of the wire where I want on the red line (positive)
Wire on gnd __> other one where I want on the blue line (negative)
Take a leg and remember where is the long leg —> I put it where I want on the middle part of the breadboard
Wire on the same line of the long leg and other part of the wire on the positive line (red)
Resistance on the same line of the small leg and the other part of the wire on the same colonne
Wire same ligne as the resistance and other part on the colore of the negative (blue)
Connect the led to pin 3
Code on Arduino
Don't forget to upload when you do changes
Sketchs —> verify
A variable = “pin-led” (this name because it’s the variable that I want to do)
And if I want to change the name of the variable, I just need to change the number because I wrote “pin-led” everywhere I wrote “3” so it will change automatically
To create light variation : file, example, basics, fade
And in “int led = “ —> I put 3 (because I put 3 in blink)
TIPS : “~ pin” = PWM (only with the numbers with the wave, the fade works)
Read analog Sensor
I wanted to create something playfull, with different shapes and textures.
Per magic, Lucia brought a circuit Monday! She deconstruted an old game from her boys. So nice and so nice of her!
I imagined like a monster to create my circuit.
- draw on textile your circuit and place your objects
- embroider a little round which will go under the battery
Type of machine : Embroidery machine Brother PR670E
- hand sew the resistance, the switch and the circuit
place the battery on the embroidered round
draw, cut and hand sew the banana on top of the battery
sew (at the machine) with the conductive thread, a line from the banana to the wire of the circuit
Normally, it should work when I press the button at the center of my circuit but the circuit's wires were damaged and I tried to repair them but it didn't work. So I'm going to weld them at Oullins on Wednesday to create again a current.
I also had a problem with the conductive thread. It seems to not work when it sewn with textile, the current doesn't work. So I will use an other thread when I will go to Oullins.
At the end, I'm a little disapointed that my circuit doesn't work but I'm happy with the mecanism and the way it look's. It was (unexpectedly) funny :)
Bill of material
game circuit from a kid
conductive thread (from Textile lab)
conductive material (banana form)
embroidery machine :
Key words of the week/reflexion¶
Zen and quiete week... more to come next week aha