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5. E-textiles


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!

Conductive materials



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


Basic electronics

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

Sensors electronics

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 Velostat fabric with conductive wire

  • Momentary switch : you have to stay press to active the light --> like Diane’s switch




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)


Circuit :

- 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 led3

Code on Arduino

Don't forget to upload when you do changes

Save correctly

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

  • battery 90V

  • resistance

  • switch

  • conductive thread (from Textile lab)

  • conductive material (banana form)

  • wires

  • wool

  • embroidery machine :

Circuit schematics

Key words of the week/reflexion

Zen and quiete week... more to come next week aha

Last update: 2022-08-08