1. Conductive Textiles Where Electronics Meet Textiles Workshop with Lynne Bruning and Troy Robert Nachtigall Sponsored by Spark Fun and PlugandWear Versione 3.0 - January 2010

2. Different Materials have different Conductivity

3. Conductor? NON- CONDUCTOR SEMI CONDUCTOR SUPER CONDUCTOR INSULATORS

4. Conductive Yarns

5. Filament, Spun coated, and Ply Yarns

6. MAking Condutive Thread

7. Mixing Conductive and non- conductive Fibers Current/conductivity in thread depends upon three major factors: 1.Conductive Material Used 2.% of Conductive Fibers 3.Longitudinal Configuration & Horizontal Configuration

8. Conductive Fibers - metals – copper, silver, stainless steel, brass, Monel (Nickel) - metallized fibers - polyamide/silver- carbon

9. Fiber Horizontal Configurations Dog Bone Triorbial Hollow Core Natural Circular Segmented

10. Fiber Longitudinal Configurations Straight Twisted Coiled Crimped

11. All conductors have resistance Wearable electronics have more resistance because they are part non condutor. We can create a variable resistor (or Potentiometer) by attaching a jewelry closure.

12. Let’s Try it

14. Electricity in simple knitted fabrics

15. Pressure sensitive fabric Characteristics  Activation force 3.6 Kg per 50 mm diameter More then 1.000.000 cycles For a 15 cm x 20 cm switch resistance when pressed: around 200 Ohm, open circuit when non pressed

16. Pressure sensitive fabrics Innovative aspects No need of further production steps Low cost Transpiring Semi-transparent Flexible Different activating pressures Matrix switches Large area switches (50 cm x 50 cm) Skin compatible materials

17. State Change Detection Load up the sketch /Examples/Digital/St ateChangeDetectio n This sketch counts how many times a button is pressed

18. Textile button sensors Two different hookups Normal Button Resistor 1 2 1 1 2 2

19. textile perfboard

20. Velostat