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STEM TEXTILES

STEM TEXTILES. GETTING STARTED WITH E - TEXTILES. Heidi Ambrose-Brown. E - Textiles. What do I need to know? What components do I need? Where do I get them from? How do they work together? How does a circuit work? Functional vs decorative?. Throughout today….

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STEM TEXTILES

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  1. STEM TEXTILES GETTING STARTED WITH E - TEXTILES Heidi Ambrose-Brown .

  2. E - Textiles • What do I need to know? • What components do I need? • Where do I get them from? • How do they work together? • How does a circuit work? • Functional vs decorative?

  3. Throughout today….. • What existing textiles project could I build this into? • Is the use of electronics in the project too contrived? • Am I using an existing electronics project that exists in kit form? • Am I creating the circuit from scratch with conductive thread and/or fabric?

  4. E-TEXTILES :Through the eyes of a teenager………… • E-Textiles are visual • Popularise d by celebrities • Linked to performing arts e.g. dancers, mime acts, magicians, cirque du soleil, plus pop stars. • Linked to MP3 players You Tube: Black Eyed Peas Super Bowl 2011 – awesome use of e- textiles in both the band’s clothing and the dancers.

  5. Through the eyes of a D&T teacher…… • Electronics Teacher: • Complexity of electronic circuits • Varied use of outputs e.g. sensors, light • Use of programming software • Designing PCBs

  6. Through the eyes of a D&T teacher…… • Textiles teacher……. • Conductive thread • Conductive fabric • Soft switches • Textile components as switches • LEDs – all colours, flashing, rainbow.

  7. Is E-Textiles just about making things light up? NO!! Textiles can be used to sense movement, light, moisture. They can be used with soft switches to create sound e.g. fabric piano USING LIGHT AS A STARTING POINT IS IMMEDIATE, VISUAL AND INEXPENSIVE. PUTS THE WOW FACTOR INTO TEXTILES AND A GOOD STARTING POINT FROM WHICH TO BUILD.

  8. 4 WAYS TO INTRODUCE LIGHT INTO TEXTILES PRODUCTS • FIBRE OPTICS • ELECTROLUMINESCENT WIRE • ELECTRONIC “KITS” – EXISTING ELECTRONIC PROJECTS • CONDUCTIVE THREAD AND FABRIC

  9. USING FIBRE OPTICS Fibres that allow light to travel along them. Must be attached to a light source e.g. LED at one end. The light then comes out of the other end. Lots of different widths. Commercially used for data transmission as well.

  10. ENGINEERING ELEGANCE WINNING DESIGN www.cutecircuit.com KS3 RESOURCE “ENGINEERING ELEGANCE” - from D&T Assoc www.data.org.uk Circuit board for t-shirts Poppers used to attach to shirt.

  11. Fibre optics in the classroom.(very low tech!) FIBRE OPTICS • Lengths of fibre optics (from cheap lamp is fine) need to be cut cleanly at one end. (Hold together with heat tape.) • Stick LED in a blob of blue tack to hold it steady. • Use heat gun to apply blob of glue to top of LED. • Firmly hold the cut edge of fibre optic bundle on top of the glue so they are coming directly out of the top of the LED. LED

  12. Using fibre optics in the corsage. Fibre optic lengths bound together with heat tape. Glue Top of LED

  13. Working with EL wire (Electroluminescent) A thin copper wire coated in a phosphor which glows when an alternating current is applied to it. This has a PVC sleeve around the outside. NOTE: Only curve the wire – don’t bend it too sharply or the copper wire will snap and the light won’t work.

  14. www.surelight.com 3 Piece EL Wire Evaluation Kit 3 x 0.5m Inverter £12.00 Don’t buy wire and inverter separately – too tricky to solder together. Always buy as a kit. There is nothing to learn about electronics – treat it as a braid!

  15. Couching down EL wire. Stretch background fabric in hoop to make stitching easier.

  16. WORKING WITH LEDS

  17. ELECTRONIC KITS CREATING A TEXTILES PRODUCT AS A CASE FOR THE CIRCUIT BOARD. Nightlight Project Flashing LED kit Used for Skull badge.

  18. LINK ELECTRONIC COMPONENTS WITH CONDUCTIVE THREAD, FABRIC AND OTHER TEXTILE COMPONENTS TO CREATE OWN CIRCUIT. The basic circuit: Battery, switch and LED joined together by conductive thread.

  19. Working with LEDS • What types are there? • Standard high brightness (many colours but this affects cost/LED) from 10p upwards • Rainbow (change colour without any programming) about 65p • Flashing (will flash in predetermined way, if used in conjunction with another LED it can make that flash also) about 35p • Surface Mount (much smaller and flatter) about 13p

  20. THE BASICS +VE OR ANODE SIDE OF BATTERY HOLDER. LED LED MUST BE THE CORRECT WAY ROUND.I.E. LONG LEG JOINED TO ANODE AND SHORT LEG JOINED TO CATHODE. -VE OR CATHODE SIDE OF BATTERY HOLDER. Image : possytronics

  21. Differentiating between the legs of an LED in class • Tie thread around anode • Curl up the cathode more times than the anode • Mark on fabric which is anode and which is cathode. Never stitch the 2 legs of an LED together – it won’t work!

  22. Cell Retainer POWER SUPPLY 3V Coin cell Mini slide switch 3v PCB Squeeze solder paste here.

  23. Practical Activity Create Basic circuit 1: • Either make a sample for display board to show 2 LEDs in parallel • Or make a simple brooch using just 1 LED

  24. USING SOLDER PASTE www.electronelec.co.uk

  25. USING SOLDER PASTE Squeeze small blob onto silver pad on the PCB – using the syringe Squash the battery holder and switch into place. Turn oven onto maximum heat. Insert temperature probe. Use multi meter to check oven temperature. Watch for solder to change to shiny silver at about 240. Open oven door and switch off timer. Allow to cool before handling

  26. Basic Circuit - with 2 LEDS in parallel Switch The anode legs (long ones) are stitched together. Battery The cathode legs (short ones) are stitched together and joined up to the cathode end of the battery holder.

  27. Practical Activity: Create Basic circuit 2Using Conductive fabric SOFT (Pressure) SWITCH Use foam to separate the conductive fabric. Cut a hole in centre so when compressed, the fabrics meet through the hole to complete the circuit. Circuit is broken when pressure taken off switch.

  28. Attaching conductive thread to soft switch. Slide needle between the foam and conductive fabric. Come up into conductive fabric about 5mm from edge. Oversew about 4 times to get a good connection between the two. Turn the switch upside down so that the thread is coming off the bottom surface and stitch to one leg of the LED. Repeat for the top of the switch, over-sewing the conductive thread 4 times and stitch to one side of the battery holder.

  29. Soft (pressure) switch circuit. Great for toys – squeeze the phone to make the glasses light up!

  30. Practical Activity: Circuit 3 Textile Components as a switch • Create a “pocket” which has patches of conductive fabric on either side of the inside. Battery cell is inserted next to conductive fabric – they are always in contact. • Stitch metal poppers onto reverse of patch and onto product. • Use conductive thread to join the poppers to the rest of the circuit. • Circuit only works when poppers are joined and is broken when they are taken apart.

  31. Press studs as a switch. Create own battery holder Truly flexible circuit – no chunky electronic boards or components.

  32. CREATING THE BATTERY HOLDER INSIDE THE BATTERY HOLDER. Fold in half and stitch with normalthread the conductive fabric pieces just above and below the fold. Top edge outside inside OUTSIDE: on one half stitch the male half of the press stud close to the edge. Go through 2 holes using normal thread. Conductive fabric Press stud

  33. USING THE CONDUCTIVE THREAD: Attach conductive thread to one piece of conductive fabric and stitch it to the outside and join onto the press stud. inside outside The second line of stitching will be longer as it runs down the inside to connect to the second press stud. Conductive thread Conductive fabric Press stud

  34. Stitch LED as usual with conductive thread. Take one leg down to the female half of the press stud. Then repeat with the other leg. Doesn’t matter at this stage which way round the LED is. Insert coin cell so it sits between the conductive fabric and push press studs together. If nothing happens, turn the cell over and try again. Stitch up sides of felt to make a snug pocket for the coin cell.

  35. OTHER WAYS TO USE TEXTILES COMPONENTS AS SWITCHES. • METAL ZIPS – connection is made on closing not opening. • VELCRO – can buy conductive velcro but expensive. (PRICE £4.99 (ex vat) per 100mm Possytronic )Try threading conductive thread through the surface of normal vecro. • POPPERS/HOOK & EYES

  36. Zip as the switch – simplest way is LED lights up when the zipper teeth are in contact Can you spot the problem with this! Adapt this to use in a more practical way – e.g. insert a pocket in a t-shirt. Eyes flash when zip fully closed.

  37. What next…………. • Consider existing products and how the use of e-textiles might enhance them and engage students. • Using surface mount electronics to gain more control of how the e-textiles perform • Resources list on my website and course CDto get you started.

  38. SUPPLIERS FOR E-TEXTILES www.electronelec.co.uk • 3v pcb kit - £1.15 + VAT or pre soldered £1.75 + VAT • LEDs – from 6p • Solder paste - £13.75 + VAT • Oven - £22.90 + VAT • Conductive thread – £22.90 + VAT • Coin cells – CR2032 Lithium coin cell 16peach. www.mindsetsonline.co.uk - Conductive fabric - order Zelt. www.rapidonline.co.uk – rainbow LEDs WHEN ORDERING LEDS – CLICK ON OPTO TO FIND THEM.

  39. Websites for ideas: www.cutecircuit.com–wearable technology design company www.instructables.com–search for Lynne Bruning also Fabric Buttons by Pulsea. www.fashioningtech.com - part of the wearable electronics community, great for sharing ideas and resources. www.enlighted.com - great gallery of e-textile garments and accessories ( does have bras and thongs!) www.talk2myshirt–another community site for wearable electronics Google images for Leah Buechley - she developed the lilypad arduino board. Also look for her work on You Tube. Try Craft Video: Craft meets Tech at MIT by makemagazine.

  40. CDs “Engineering Elegance”Key Resource CD by Heidi Ambrose-Brown. Available only through D&T Association on line shop: www.data.org.uk. Accessible by non members also. Resource Vault/ Non members

  41. FREE DOWNLOAD click on non members and scroll down to Secondary classroom resources, click on Engineering Elegance for short series of slides, teachers notes and company profile of Cute Circuit. SEE MY HARDCOPY OF ENGINEERING ELEGANCE Videos (10 mins each – show how a fashion drawing becomes reality, with e-textiles dress.) http://www.teachersmedia.co.uk/videos/engineering-elegance-design http://www.teachersmedia.co.uk/videos/engineering-elegance-manufacturing http://www.teachersmedia.co.uk/videos/engineering-elegance-awards

  42. MOVING FORWARD WITH E-TEXTILES • Surface mount technology • Programming pics to create a variety of outputs • Flashing light sequences • Changing colour sequences using tri coloured LEDs • Produce sound

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