E-Textile Summer Camp 2015

This is a rather late report of the E-Textile Summer Camp 2015 as it ended many months ago, but it’s a post that has been on my to-do list and I didn’t want to completely abandon it.

This past July/August, around 35 experts in e-textiles/smart materials gathered at Paillard Centre d’Art Contemporain & Résidence d’Artistes in Poncé sur le Loir, France. This was the second time I attended the camp, and even though I knew largely what to expect, still came away amazed at how much I learned.

Dinner outside

Dinner outside (weather permitting, which was most of the week).

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Barcelona Music Hack Day – Project Jane

Google announced its Project Jacquard recently. The project covers several research and development topics leading to the mass production of fabric sensors that can detect hand gestures. I think it’s a defining moment in e-textile research as it’s attracted the popular press and introduced the field of e-textiles to a consumer audience that might not have been aware of it before.

However. The announcement came via a video largely starring Ivan Poupyrev, the project’s founder. I don’t really think of project managers in Mountain View when I think about e-textiles. I think of the amazing work grown from a grassroots level that is shared with the community. Work that has historically had far more women involved than what is typically seen in tech spheres. Project Jacquard feels a little like an erasure of those contributions, so I wanted to honour them in my hack.

I decided to make a soft sensor that detects hand gestures in 24 hours at the Barcelona Music Hack Day. This is Project Jane.

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Music Festival Bag – Midem Hack

This weekend I took part in the Midem Music Hack Day and I made this:Finished Bag

UPDATE: I won the hack! Here’s a video of my pitch presentation (starts at 9:25).

It involved flying to Cannes and enjoying this view:

View from Midem

Working on a hardware hack involving stitching was advantageous as it meant I could just sit outside and do a bit of hand sewing.

The Concept

I was inspired by the start of the music festival season in the UK and made a bag for wandering between stages. The bag is embedded with LEDs that are controlled to relay information to the wearer without needing to look at their phone.

LEDs on Bag Turned On

The bag starts with an animation to indicate it’s waiting to be connected to a Bluetooth LE device. Once a connection is made by selecting the bag from the phone’s Bluetooth device list, a general light animation starts.

The phone can send messages to the bag and instruct it to light up for particular notifications. I had it light up as all red and all green as a demo. This could be a notification that you’ve received a text message or that a show you indicated you want to attend is about to start. It alerts you to look at your phone for more information.

All the physical interactions with the bag use the tassels at the end of the drawstrings. Touch the pink tassel to the beadwork along the bottom of the to change the animation or to clear a notification and return to the animation.









The blue tassel will send a message back to the phone. A potential use case would be if you ended up near a stage at a music festival and like what you heard, but didn’t know the artist, you could touch the blue tassel to the beadwork to tell a festival app on the phone to record the current GPS and time data to determine what artist in the schedule you heard. You could later refer back to that “bookmark” in the app.

The Details

I bought the bag from the Stratford Westfield from a generic mall store. It was on sale. I was looking for a patterned bag that was on trend fashion-wise and had parts that could be easily adapted into a soft-circuit interface. The woven fabric proved to be an excellent choice as it was very easy to work with.

Purchased Bag

I was lucky that the bag was constructed well and had a layer of interfacing in between the outer fabric and lining fabric. It was also complete luck that some of the beads were conductive (I hadn’t taken a multimeter with me to the store).

Bag Build

The whole thing ran on an Arduino Micro on a breadboard. It was connected to a strand of 50 WS2801 RGB LEDs and talked with a phone via the Adafruit Bluefruit nRF8001 Breakout Board. The phone ran Nordic’s demo app for working with their chips. It was a great tool. I just sent messages to the Arduino via the app’s UART interface.

Code is available on my github.






School of Maaa

Still catching up on the activities of this summer. One of the closing events and highlights was spending a few days in Berlin teaching at the School of Machines, Making & Make-Believe.

I spent 3 days with around a dozen students from a variety of backgrounds. They included artists, designers and engineers. The general topic I was teaching was wearables. It was the second week of the programme and everyone had some amount of experience with Arduino.

I started my sessions with a bit of background about myself and a broad overview of the intersections of e-textiles, wearables and art. We then started with switches in the afternoon.

The big technical topic of the afternoon was the role of pull up and pull down resistors.

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E-Textile Summer Camp 2014


This past July I got to participate in a week-long camp that I think will remain a top highlight of 2014. I attended the E-Textile Summer Camp 2014 at the Paillard Centre d’Art Contemporain & Résidence d’Artistes. I was accepted last year, but then was gutted when my passport and visa didn’t arrive in time from the UK government to let me travel. (I didn’t know it then, but I wouldn’t receive it for another 5 months past the camp, so it wasn’t really a close call. Thanks, Theresa May.) So I was super eager to attend this year.

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A Necklace

Necklace Exhibition

Stephanie Posavec was invited to contribute to the Futures 10 – the closing exhibition of the Wearable Futures Conference.

I was given the theme of ‘memories’. As an urban pedestrian, I often walk by memorable locations from my past, and imagine how my memories are layered upon the city over the memories of those who lived before me. I wish I could experience these memories more clearly, so I decided to create a device that would make one’s memory traces more physical and tangible. This device tags memories to a location, gathering audio and emotional data and providing a 3d-scan of the memory space. Memory maps are created over time, as personal or shared maps, and maps of past lives can be accessed by loved ones as a form a remembrance. Later, through the use of audio and haptic feedback, while walking through the city a user is able to ‘brush up’ against a 3d-texture of a memory and feel and hear important moments from their past.

Stephanie on Memories in Wearable Futures

Stephanie is an amazing visual designer and largely works with data visualisation for print, so designing an inactive wearable piece was outside her comfort zone. I think she did a great job, but she wanted some help to bring her concept off the page and make a physical prototype. We spent a day together creating the pendant for her piece.

She decided to represent the interaction through a pulsing light embedded in a necklace. She designed the light pulsing pattern and colour to show different types of memories and I got an RGB LED mocked up with an Arduino and breadboard.Prototype of Necklace

Once the colour and tempo was finalised, I programmed an ATtiny45 to do the same as the Arduino. We wanted the piece to be as small as the tech would allow, so I soldered the LED and resistors directly to the microcontroller. The pendant was constructed from two pieces of walnut wood sandwiching a piece of acrylic to diffuse the light. The circuit board was created from pieces of copper tape. The adhesive of the tape made a fairly strong contact against the wood.

Construction of Necklace

The finished pendant had a roughly 30 second cycle of 5 memories with different attributes of being personal, shared, or in remembrance.

Necklace Colours

Stephanie turned the pendant into a full necklace along with designing two boards to explain the concept. My photos and video of the exhibition aren’t great, but hopefully sufficient to get an idea of the finished piece.

It was kinda funny, and quite characteristic of those in attendance, that everyone felt very comfortable touching the pieces. The circuit on the back of the pendant was not intended for public viewing; it was supposed to hidden against the body when worn. But the necklace kept getting flipped over by curious attendees to inspect the tech.

Futures10 Necklace from Becky Stewart on Vimeo.

A Onesie

To round out 2013,  I’m going to post three projects I completed in November and December. All three were ideas that had been thought about for varying lengths of time, but were each executed in a single day. The first two, both wearable technology pieces, are more related than the third, a bingo card game.

Baby Onesie

This project was a very quick commission to provide a proof of concept for what wearable technology for children could be. It was part of an investigation for a funding bid into whether wearable tech could enhance play between parent and child.

Babyglow Onesie from Becky Stewart on Vimeo.

It was a very quick turnaround. I was approached on a Tuesday and the piece was needed the following Saturday. It was requested that the garment be a onesie or baby-grow, but that the interaction was largely up to me. The point of the piece was to demonstrate to parents in a workshop what a finished piece of wearable tech could look like as they were going to be shown other sensors and actuators outside of a finished piece.

I ordered in some kit on the Wednesday and Thursday then started and completed the piece on the Friday.

The concept was very simple: an appliqué of three balloons that appear white when the garment is not powered, light up in three different colours and then change colours when the child jumps up and down. This movement was detected by an accelerometer on the right leg.

The onesie was purchased off the high street. The appliqué was created by using several layers of white tulle as a diffuser and white cotton fabric. The tulle was an ok diffuser, certainly acceptable within the time limits and materials on hand for experimentation, but I would want to improve it if the project were to move forward. The photo looks less diffuse than it appears in person.


The underlying electronics are three Adafruit NeoPixels controlled by a LilyPad SimpleSnap with a LilyPad Accelerometer on the leg. The NeoPixels were the breadboard-friendly version as opposed to the ones explicitly designed for soft circuits as they were the easiest to get ahold of quickly. They don’t ship with the header pins soldered on, so you can use the via holes for the header pins for sewing.

Onsie LEDs

As there were some longer runs for the circuit, I decided to try conductive ribbon for the first time. The type I chose advertised a low resistance and that it didn’t short if folded on itself. Overall, it was much better than working solely with conductive thread, but the transition from the ribbon to the components is a little awkward.

The Lilypad was attached to the lower back using snaps. The placement was in hope that it would be the most difficult place for the child to reach. It was placed low on the back so that it wouldn’t poke into them if they leaned back against something.

The SimpleSnap comes with female snaps already soldered onto the pads, which seemed convenient as I would have done that myself anyway. However, it didn’t actually come with the corresponding male snaps which was a big pain. It took a while to track down the right size snaps and now I have a handful of females snaps leftover without male pairs. However, the integrated battery is a big plus.

Back of Onesie

If I had more time, I would have created an appliqué to cover the accelerometer as well.

There is nothing particularly clever or groundbreaking in the code, but it’s up on Github.

Finished Onesie

The Quickest of Hacks with Moving Brands and Bare Conductive

This past Saturday I attended a hack day hosted by Moving Brands (#MBInkHack on Twitter). The hack centered around working with Bare Conductive’s Electric Paint (which is often referred to as the misnomer conductive ink). After accepting the invitation I was incredibly excited to learn that we would also get to try out the Touch Board – Bare Conductive’s new product not due to ship until March.

The hack day started at 10am and we were in the pub by 5pm. Certainly the shortest hack day I’ve attended. It was only 4 hours of actual hacking, but the results were amazing. You couldn’t fool yourself into thinking you could accomplish anything huge and everything was physical. It was so refreshing to not have a single website developed and presented at the end of the hack.

I worked with Ben Fields and Alan Waldock. Emilie Giles joined us around midday and was trooper working through a cold brought on by London’s change of seasons. Our concept was to create an instrument out of a paint roller where you roll the paint roller over a score to play the music. Like a physical audio scrubber. We had hopes of implementing a copper tape and brush rotary system to actually allow the roller to freely rotate, but that just wasn’t feasible in our limited time. We instead painted conductive paths with Electric Paint using a stencil Al created.

The Touch Board has onboard capabilities to be a MIDI instrument and handle capacitive touch sensing all programmable from the Arduino toolchain.  We had 12 stripes of paint each hooked up to a capacitive input which triggered a MIDI piano note.  The board has an amp and direct audio out along with a connector for a LiPo and built-in charger, so the whole thing was entirely wireless.  We plugged in a little portable speaker and a LiPo and we had “music”.

There was a lot of video and photos taken with some quite expensive cameras, but that’s not released yet. So here are some photos from phones.

Rock 'n Roller


There were 7 groups of 3-4 people.  All of the resulting hacks were amazing and are easier to explain via video and photos rather than awkward text, so I’ll update this post when videos are put up online.

I’m just so impressed by the thought behind the board.  There is nothing shiny and brand new on it; it’s a bit of a Frankenstein’s monster of various open source projects.  But it’s all put together with so much consideration.  It fits beautifully within existing open source hardware projects, which Nick Ludlam (CTO of BERG) noted when he brought along BERG’s Devshield.  He popped it on the Touch Board and both played nicely with each other right away.

Thank you to Moving Brands for putting on the event and thank you to Bare Conductive for being brave enough to let a room of designers and devs loose with your still beta tech!


Below is a short video documenting the day!

Ink Hack! from Moving Brands® on Vimeo.

Bike for Sale – Nottingham Cruiser

Bike for sale

I’m selling the first bike that introduced me to the best way to get around London.

In brief

  • £180 o.n.o. for the bike including lights and locks
  • Raleigh Panache (1980s mixte frame with dual down tube)
  • Frame (seat tube) is 21″ (53 cm), but as it’s a mixte frame, you don’t really need to worry about the standover height. I’m 5’4″ (162cm) and this bike is a little bit too big for me. But certainly test ride it first.
  • Recently fully serviced at London Bike Kitchen by me
  • For collection from Hackney
  • Contact me at becky@theleadingzero.com with any questions, viewing requests, or offers
  • New/replaced items in the two years I’ve owned it
    • Rear wheel
    • Front and rear tyres
    • Chain
    • Headset
    • Handlebars and grips
    • Brake levers
    • Brake cabling and housing
    • Gear cabling and housing
    • Saddle

Bike’s Known History

I bought this bike (then named The Pink Lady) from Re-cycling in Elephant & Castle in the summer of 2011.  I strongly discourage you from ever going to that shop.  I certainly paid too much for the bike which they claim they fix up before selling on.  They definitely didn’t do that with this bike and their customer service was just abhorrent.  At that point I knew nothing about bike maintenance and didn’t know that it was in pretty poor shape.  I ended up taking it to Bike Works for servicing about 6 weeks after I bought it.  I got a puncture about 8 months after that and had the rear wheel replaced at Cycle Surgery when they fixed the puncture (I couldn’t even change a tyre at that point in my cycling maintenance knowledge…).

The following summer I bought another bike that was a bit zippier (Phil) and The Pink Lady went into storage at my flat.  I’ve since learned a ton about bicycle maintenance, thanks to the London Bike Kitchen.  I’m working on building a new bike (just got a Surly Cross Check frameset for a steal!) and can’t justify keeping The Pink Lady. I took the BYOB (Build Your Own Bike) course at the Bike Kitchen this past June.  I dismantled the bike, cleaned and replaced components as necessary, and then put her back together.  I swapped out the drop bars with their horrible brake levers for sit up and beg bars.  The new saddle was sitting around the Bike Kitchen forever and looks like it belongs on a cruiser, which inspired the new look for the bike.  I think it’s now the lovechild of a 1980s Raleigh bike and a coastal cruiser, so The Pink Lady has been rechristened The Nottingham Cruiser. (Raleigh was founded in Nottingham.)

Frameset on stand

The bike during the BYOB course at the London Bike Kitchen.

It comes with front and rear fenders and a rear rack.  I think this bike would work well for commuting and general errands around London.  That’s what I originally bought her for and she did me proud.  I think she’s now in the best condition she’s been in for a decade.  I’m selling her for £180 o.n.o. and including the lights and locks I originally bought for her.

Included lights and locks

Locks and lights included with the bike.

Installation at Tate Modern

I’ve been working with Melissa Matos of TRUSST and Vase to create a jacket that projects multiple viewpoints from the wearer onto the walls of the Tate Modern’s South Tank as a part of Hyperlink. Jacques Greene will wearing the jacket during his performance from 8:30 on Friday.

The jacket is from Rad Hourani’s collection and Rachel Freire has been working with me to integrate the tech into the jacket. I’ll post more details about the build process after the performance.

More info about the event can be found at the Tate website and on Wired.