Welcome to the KOBAKANT DIY Wearable Technology Documentation
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The following sockpuppets are made as examples for the Soft Sensors for Soft Bodies workshop at the 2015 NODE Festival in Frankfurt, Germany. The plan is to hook up the sensors on these sockpuppets to the VVVV software via an arduino running Firmata. Then we can map the sensor data to puppeteer virtual puppets or […]
Frequency Finger Gloves
Created during the E-Textile Pressure Cooker at STEIM in collaboration with Dieter Vandoren and Jonathan Reus. This pair of gloves has LEDs on one hand and photodiodes on the other. The LEDs on each finger can be pulsed (PWM) at different frequencies and the circuit on the photodiode glove translates the received light frequency directly […]
Fleckerlteppich Pressure Sensor
Using the technique of weaving strips of cut fabric in a plain weave to create colourful carpets, to make pressure sensors. Instead of sandwitching the piezoresistive material with the conductors ontop and onbottom of the pressure application direction, this design sandwitches the piezoresistive material (stretchy Eeonyx, velostat or Stainless steel Nm10/3 yarn) with the conductors […]
Yoghurt pots make great resonant bodies (especially Stichfestes Yoghurt:-). So weaving the speaker membrane from the rim of the pot seems like an obvious opportunity. This post documents how to puncture holes around the rim using a hot needle, thread a circular warp and then weave in and out around in a spiral alternating between […]
As a part of the Engineering for Social Impact workshop by NYUAD, I have visited embroidery workshop in Dharavi Mumbai. Here I’ve met an amazing embroidery machine that will be perfect for eTextile applications. This is an embroidery machine from Golden Wheel, model CS530 (I think, the label was faded out). It can do chain […]
Wimper in German translates to “Eyelash”. This contact switch is made from conducive thread stitched into neoprene to create “lashes” that hover over a band of silverized nylon stretch conductive fabric. Contact between a lash and the band closes the switch.
Soft Sensors for Soft Bodies
Saturday May 2nd 2015, 6 hour workshop during the 2015 NODE Festival in Frankfurt, Germany An introduction to building sensors that are soft, stretchy and fit to our fleshy human bodies to capture our movements, gestures and interactions with the world.
April 6-8th 2015, 10-18:00 The Sounding Textiles workshop is hosted by STEIM and will be lead by Afroditi Psarra, and Mika Satomi and Hannah Perner-Wilson of Kobakant. Fabrics are generally considered to be soundless. They don’t make much sound when we wear them, scrunch them up or sit on them. In fact in many cases, […]
Electronics as Material II
9-13 March 2015, taught by David Gauthier and Hannah Perner-Wilson at the Copenhagen Institute for Interaction Design in Copenhagen, Denmark How might we imagine and build electronics differently, if instead of thinking about electronics in terms of discrete components, we learn to control the flow of electricity through different materials?
The Sound of Nature
Wednesday February 4th 2015, 4pm at the University in Antananarivo, Madagascar Together with Brian Fisher, a visit and short talk at the Ecole Polytechnique Vontovorona to meet the engineering students. Very brief introduction to the ant research happening at the Madagascar Biodiversity Center and some examples of electronic textile materials. We explained how both building […]
Stretchy Eeonyx for Sale!!!
Plug and Wear is now retailing small quantities of Eeonyx stretch piezoresistive fabric!
Fashioning Textile Sensors
May 12th 2015, 6 hour workshop at Parsons in Paris, France This workshop is only open to students of Parsons Paris. A six-hour introductory workshop to the materials, tools and techniques for building resistive sensors from textiles. Making your own sensors enables you to customize interactions to the specifics of your project. Sensors made from […]
Plotted Flex AA Battery Holder
For those times when you’re in need of a flexible 3 x AA battery holder…
Hard to Soft Snap Connection
An example of how to make a metal snap connection between a hard (circuit board, speaker, component…) and a soft (fabric, thread….) element.
Grias Di Hut
This example titled “Greeting Hat” shows how a record and playback module intended for greetings cards is made sewable and the various components are integrated into a red hat. When the round purple record button is pressed the module records up to 10 seconds of audio through the microphone. And when the hat is tiled […]
Plotted Flex PCB
Using a Silhouette Cameo Plotter to cut a flexible circuitboard from various materials. The circuit base material is Kapton, a material that can withstand the high heat of soldering. The conductive circuit traces are cut from a sheet of copper tape and transferred manually onto the Kapton base. Finally a soldermask is cut from very […]
All your segments are belong to me
Saturday October 11th 2014, 9:30-17:00 as part of the Wear It Festival in Berlin, Germany In this workshop we will build our own segment displays and attach them to our bodies, turning ourselves into platforms for personal signage. What text would you like to display on yourself?
Technical Intimacy Workshop
October 6th & 7th 2014, 10-17:00 as part of the SOFT Symposium on Fashion Technology at The Royal Academy of Art in The Hague Bodies as Instruments: Masterclass and Symposium at KABK Workshop Leaders: Marije Baalman, Mika Satomi & Hannah Perner-Wilson (KOBAKANT) In this two-day workshop participants will explore the human body as a platform […]
Electronic Textiles Live
11-21 September 2014, as part of the Schmiede festival in Hallein near Salzburg, Austria The aim of this 10-day joint project is to bring together e-textile practitioners with performing artists to build interactive wearables and textiles that can be performed in a live context. The project will take place as part of the Schmiede festival […]
Jenny’s Playlist Costume
Currently I am making costumes for the music duo “Jenny’s Playlist”. Their wish was to have costume that lights up as they perform. Yes, it is a blinky LED costume! After a long meeting with them to decide what kind of aesthetic it should be, and how it should be light up, we decided to […]
This example of shape memory alloy (SMA) used to actuate fabric into a smocking pattern was made during the SMA meets Smocking Workshop held by Aniela Hoitink and Isabel Cabral at the 2014 E-Textile Summercamp.
Igne Oyasi Motor
This simple motor uses a diode for it’s axis, enameled wire wrapped into a small coil for the electromagnet and Turkish needle lace (Igne Oyasi) for both structure and support. The diode provides an electrically separated axis, around which the coil can both spin and receive it’s power. The electrical properties of the diode mean […]
Screen-printed Copper Paint on Fabric
Conductive copper paint from LessEMF mixed with lubricant and screen-printed on to fabric. This print was made during the Screen-Printing Circuits Workshop held at the 2014 E-Textile Summercamp.
Zebra Zebra Fabric (X-Zebra, Y-Eeonyx)
Inspired by the availability of Zebra fabric and the fact that Eeonyx can coat a variety of materials in their secret resistive/piezoresistive formula, this post is about an idea for a fabric, that will hopefully “come true”.
Clothspin Battery Holder
Inspired by the paper solution of folding the corner of a sheet of paper and using a binder clip to hold a coin-cell battery in place, this solution is inspired by Melissa Coleman’s suggestion that a clothspin would be more suitable to fabric…
Light Touch Pressure Sensor
To make custom fabric pressure sensors that react to even the lightest touch. Ideally less than 10g of force.
Motor on a String
A very basic motor (single electromagnet coil) strung on a string. Pulling the string taught creates the axis for the motor. Contacts from either end of the electromagnet coil terminate in exposed metal rings that surround the interrupted conductive thread that is both axis for rotation and electrical contact. Connected to a 9V battery and […]
Leather coated Adjon with Eeonyx’s secret conductive polymer formula, not only makes the leather conductive but also gives it piezoresistive (pressure and stretch sensitive) properties similar to other EeonTex fabrics and velostat.
eTextile Summer Camp 2014
The eTextiles Summer Camp (eTextile-summercamp.org) is a week-long event that brings together expert practitioners of eTextiles and Soft Circuitry in one place to share their knowledge and skills through hands-on workshops, and facilitate discussions around their practices. We are looking for makers, designers, engineers and artists, who work in the field of eTextiles and soft […]
This post summarizes various conductive fabrics and narrow-fabrics that have separated areas of conductivity. This can be a useful property to have when looking to make multi-wire connections or matrices.
A Kit-of-No-Parts at Weissensee
19-21 May 2014 in the course 101 (one-o-one) at the Kunsthochschule Weissensee in Berlin, Germany
Sewn from pieces of non-conductive stretch jersey and Eeontex piezoresistive knit stretch fabric. The fabric of this ball with a balloon inside stretches when the balloon is inflated and the Eeontex fabric becomes less conductive the more it is stretched. Two contacts sewn with conductive thread on either side of one of the Eeontex segments […]
May 15, 16 2014 at F-A-S-T in Dresden, Germany In this two-day workshop participants will build and perform Chip-Man-Band Costumes – combining wearable electronics with chiptune music and the idea of one-man-band instruments!
Electronics as Material at CIID
5-9 May 2014, taught by David Gauthier, David Mellis and Hannah Perner-Wilson at the Copenhagen Institute for Interaction Design in Copenhagen, Denmark In this introductory course, electronics are presented as materials. How might we imagine and build electronics differently, if instead of thinking about electronics in terms of discrete components, we learn to control the […]
Resistance Visualization Tool
Tool you can make for visualizing the resistance of materials and sensors.
Danish Krown Slide-Switch
Two danish 1 Krone coins strung on conductive thread. When the coins meet the electrical contact between the threads is bridged, thus closing the “switch”. There are so many different kinds of materials in the world! Conductive, resistive, pizeoresistive, semi-conductive, non-conductive. We use them every day, in all kinds of different ways. Why not use […]
Meet the Materials Workshop
Friday March 28th 14-19:00 at Iskele47 in Kadiköy, Istanbul Super quick intro workshop to electronic textile materials and craft techniques for making fabric sensors and soft circuits. Materials: Copper conductive thread (KarlGrimm) Silverized Conductive Thread (Statex) Silverized Conductive Thread (Elitex) Copper conductive fabric Stretchy Silver Conductive fabric conductive yarn Conductive wool
WishLab II Workshop
22, 23 February & 1, 2 March 2014, part of the Making Lab at APAP in Anyang, Seoul/South Korea
A gift for a friend from KOBAKANT. Made using the DressCode circuit.
DressCode Dress Shirt
DressCode is a sound reactive circuit based on PIC, developed by Seb Madgwick, Vincent Akkermans, Sophie McDonald and KOBAKANT. It has 3 output pins that gets activated as the environmental sound changes. It has auto gain feature so it adjust to the general sound amount of the environment. (for example, if you go to a […]
Inspired by this Instructable (http://www.instructables.com/id/LilyPad-Wrist-Band-POV/), I have tried to make a POV (Persistence Of Vision) with ATTINY, so it can be cheap and tiny. Materials used: – 8 SMD LED – ATTINY45 – 8 pin socket (not necessary) – KarlGrimm conductive thread – Lipo battery My idea is to use ATTINY45 (or 85) instead of […]
Flex PCB and Solder Mask Supplies
Solder masks are layers of mataerial applied to circuitboards before soldering. The protect the conductive traces against oxidization and shorting out, but also help control the flow of solder when soldering the parts to the board. Solder masks are commonly silk-screened on to the etched circuit as a thin layer of coloured epoxy. Solder masks […]
Laser- and Vinylcut Solder Masks
Make your own solder mask! Links: Fusible interfacing >> http://www.kobakant.at/DIY/?p=1611 Solder mask supplies >> Vinycut fabric circuits >> http://www.kobakant.at/DIY/?p=1132
Embroidered LilyBLE Module
The LilyBLE was designed by Katharina Bredies as combines the a sewable arduino platform for programming microcontrollers with the new Bluetooth standard 4.0 Bluetooth Low Energy (BLE). In addition to the LilyBLE module there is also a visual programming environment for the iPad that allows you to connect various sensors and actuators to the i/o […]
The Interactive Knit Book demonstrates examples of knited electronic elements such as switches, sensors, speakers, and heaters that cause colour change. This book was compiled as the result of the EIT ICT Connected Textiles research done at the Design Research Lab at the UdK Berlin.
DressCode Workshop Berlin
Saturday December 7th, 12-19:00 at FabLab Berlin DressCode celebrates fancy dress in a modern style extravaganza. Rather than shun the ever growing presence of blinking LEDs, we encourage everybody to partake in the illuminated future by making their own blinking sound-reactive attire! DressCode is about making, meeting, partying and becoming part of something big and […]
Elektronik und Handwerk
(for English see bellow) Samstag 23 November 2013, 11-18:00 bei Subnet in Salzburg, Österreich Wie könnte Elektronik aussehen, hätte der Schneider im Dorf ein Gerät speziell für dich angefertigt? Welche Art von Benützeroberfläche würde dir der Tischler bauen? Wie müsste sich eine Fernbedienung vom Schmied anfühlen? Wie würdest du dein Handy vom Juwelier bedienen? Welche […]
Xbee lilypad shield PCB
I have printed a xbee shield for lilypad, so you can snap Xbee onto a Lilypad using the FTDI pins (the 6pin headers on Lilypad) without disturbing the on/off switch or the Lipo connector. The PCB is designed with Fritzing. Here is the fritzing file on github >> https://github.com/mikst/code/blob/master/Xbee/XbeePCB.fzz Here is a bit of image […]
TrafoPop LED Jacket
This jacket was made at the 2nd TrafoPop Build Your Own LED Jacket workshop in Berlin, Germany. Thanks to Thomas Gnahm and Stafan Hintz for a wonderful workshop!
Kinder Egg WishLab
Saturday November 16 2013, 14-18:00 at interfiction in Kassel, Germany Upset with how boring the last surprise inside your Kinder Egg turned out to be? You’re not alone! Under the festival theme “ANALOGITAL” we’ll be running the Kinder Egg WishLab to take a look at what kinds of cool new surprises can be dreamed up […]
Action Figure Motion-Capture
Want to build a full-body motion-capture system, but lazy to sew a human-size suit? This tutorial shows how to make a motion-capture costume for action figures. Flexpoint bend sensors are placed on the joints to capture their movement and position. An x-OSC is used to capture the analog sensor data and send it via WiFi […]
Physical Computing Stammtisch
Join us every Thursday 18:30 at the FabLab Berlin for an evening of all things compulational and physical – including electronics and textiles.
Card Weaving Workshop
Thursday October 17th 18:30-21:30, FabLab Berlin This post is from card weaving workshop by Kati and Ramyah (eCraft Collective) at the Physical Computing Meeting at Fablab Berlin. Also see card and band weaving techniques >> http://www.kobakant.at/DIY/?p=4476 During the Physical Computing Workshop, KATI HYYPPÄ and RAMYAH GOWRISHANKAR from eCrafts Collective has gave a card weaving workshop. […]
Wouldn’t it be nice if you could simply press-fit your lilypad arduino to your fabric circuit traces! That you could sew your circuit with the sewing machine using conductive thread and not have to do all the hard-soft connections by hand! Here some experiments in making a 3D printed LilyPad SnapRing that connects in this […]
3D Printed Sensors
Attempts to 3D print a variety of sensors from conductive ABS material in collaboration with FabLab Berlin. Interestingly the resistance of the material decreases when bent, implying that the electrical connections are being broken in the material because it is being stretched or damaged. When pressured the resistance through the material decreases.
Relief embroidery on leather is traditionally used in Austria to create decorative patterns on the surface of the leather used in Lederhosen. The embroidery thread does not pass through the material, instead it is stitched back and forth, pulling together the leather and creating a “bump” (germ. “wulst”). This bump also serves a purpose of […]
DIY Arduino Data Gloves
Sew your own pair of Data Gloves, each with 8 bend sensors for finger gesture tracking and recognistion, an ArduIMU for measuring orientation and acceleration, an RGB LED for visual feedback, and a vibration motor for haptic feedback. You’ll find the patterns, materials&parts lists and full instructions for making a pair of DIY Data Gloves […]
Fabric LED Strip
This is a super simple fabric LED strip with 25 LEDs, LiPo battery power and an on/off switch.
This post compiles a list of projects for e-textile designs and sensors that make use of the Eeontex range of coated conductive fabrics produced by Eeonyx. Eeontex fabrics are fabrics coated/doped with an inherently conductive polymer, making them conductive with quite a high resistance. But the resistance changes of distance, pressure through the material, and […]
Traces with Origin Workshop
Monday September 23rd 2013, 16-18:00 in the TinkerLab at the Schmiede festival in Hallein bei Salzburg/Austria Have you ever wondered what kinds of electronics we would be using if we had crafted them ourselves? What kind of interface would you have built to interact with your music? What would your alarm clock look like? How […]
Knit Ball Sensors
A series of balls knit on double-bed flat-bed knitting machine that incorproate conductive and resistive yarns to allow them to be stretch, pressure, scrunch and touch sensitive. Using lilypad Arduinos with FTDI and USB cables as well as ATtinys with Bluetooth to send sensor data to computer for visualization and sound feedback.
A series of lasercut felt designs that can host customized version of DressCode motion or sound circuits. DressCode circuits come in two variants: (1) A simple motion version that uses beaded tilt sensor to trigger LED lights to turn on and off with movement of a metal bead over patches embroidered with conductive thread. (2) […]
BLE (Bluetooth Low Energy)
Bluetooth Low Energy (BLE) is the new Bluetooth 4.0 standard (not backwards compatible!) being used by many new devices such as the iPhone and iPad. BlueGiga’s BLE module allows you to make your own device talk to other BLE devices. To make it even easier to use the BlueGiga module there exist a BLE Breakout […]
DressCode Workshop Shambala
Friday 23 August, 11am – 5pm, Shambala Festival, Market Harborough, Leicestershire In this workshop participants will sew LED lights into their clothing, making interactive costumes that react with flashing lights and light sequences to the beat of the music. Using conductive thread to sew electrical connections into the fabric of masks, t-shirts, gloves, leggings and […]
ATtiny Serial & Wireless Boards!
For projects with few i/o pins, using an ATtiny is a great alternative to arduino boards. Using software serial allows you to send and receive data over the serial port via an FTDI board, and connecting to one of Sparkfun’s Bluetooth mate boards makes for a pretty streightforward wireless option. (You could also connect it […]
Jumpsuit for actionman
Here is a step by step, how to assemble a jumpsuit for action man figure dolls. This tutorial is to make a costume for a doll, but of course if you make a bigger size of it, it can be for human as well. This pattern was made for the Action Hero Tailoring workshop at […]
Crochet Conductive Bead
If you don’t have a heavy metal bead at hand to make a Fabric Tilt Sensor with, you can make a heavy conductive bead by crocheting conductive thread around a glass marble.
Action Hero Tailoring
Friday August 2nd 2013, Tech Open Air Festival, Factory Summer Fair in Berlin, Germany Join us for some Action Hero Hacking and Tailoring with the FabLab Berlin at the Factory Summer Fair. After scanning and 3D printing a replica of your head to place upon the action hero body of your choice, we will help […]
Ikat Woven Conductive Thread
Ikat is a technique of partially dying yarns before weaving them to create a patterned fabric. A resist is applied to the yarn before the yarn is submerged in dye. This post describes a process of etching (rather than dying) conductive thread selectively, leaving some parts conductive and others non-conductive. The resulting “striped” thread is […]
Batik Etching Conductive Fabrics
Using Batik was as a resist, applying it to copper fabric and etching in a salt and vinegar bath.
Weaving Multiconductor Bands
Making a really simple loom to weave bands with multiple conductors.
Inspired by the work of Karla and Piem at V2, this speaker is knit from Elektrisola – a thin enameled copper wire. Video: Links: Inspired by Betaknit >> http://v2.nl/lab/projects/betaknit-research
Woven Pressure Sensor Matrix
Interweaving layers of conductive fabric, non-conductive fabric, velostat or Eeontex to create a pressure sensitive matrix/grid.
Beaded Tilt Sensor Swatch
A heavy metal bead strung on conductive thread and surrounded by conductive fabric petals, makes for a simple six way digital tilt switch. When the metal bead makes contact with one of the petals it completes the circuit to an LED light, causing it to light up. This very simple technique for detecting direction of […]
Lasercut Stretchy Battery Pocket
Lasercut from stretch conductive lycra, this coin-cell battery pocket makes for a super simple fabric power supply connection. A plus symbol lasercut into the center of the pouch indicates which way around the battery should be inserted.
Wish Lab Workshop
14, 15, 16 June 2013, part of the Making Lab at APAP in Anyang, Seoul/South Korea We will be setting up a temporary Wish Laboratory for Handmade Technologies as part of the Making Lab: APAP2013 project in Anyang, South Korea. If you would like to join us for three days of making people’s electronic wishes […]
Etching Flex Circuits
You can design, print and etch your own PCBs from a flexible sheet of Kapton coated with a thin layer of copper. To do this yourself you need some special materials and equipment, and if you are not planning on etching circuits more regularly then it can be nice to start by looking for a […]
LilyPad Arduino Programming
Saturday May 25th 11-18:00, Open Tech School workshop at Coop Berlin This workshop is more of a tutoring session for up to 3 participants per tutor and aims to be a super quick and basic introduction to programming an arduino lilypad, as well as personalized help building specific projects or getting started.
Arduino meets Wearables Workshop
Thursday 9th May 2013, codemotion, Berlin arduino meets Wearables: What can your clothing do for you?
Openwear Finger Bend Sensor
This project uses the Openwear open design for gLove Mono by Zoe Romano and integrates a felt & velostat bend sensor on the middle finger. A lilypad arduino is programmed to read the analog sensor value of the fabric bend sensor, and trigger 1, 2 or 3 LED lights to light up depending on how […]
Voodoo Sensor Doll
Also: poke sensor, pin prick sensor, prick sensor, sting sensor… Two layers of conductive fabric with isolating spacer in between.
eTextile Summer Camp 2013
The eTextiles Summer Camp 2013 Call for eTextiles Practitioners! The eTextiles Summer Camp (eTextile-summercamp.org) is a five day event that brings together expert practitioners of eTextiles and Soft Circuitry in one place to share their knowledge and skills through hands-on workshops, and facilitate discussions around their practices. We are looking for makers, designers, engineers and […]
E-Textile Knitting Circle
Every first Tuesday of the month, from 7pm onwards, at the Fablab-Berlin A monthly get-together for sharing, making and debugging all things eTextile related! Link >> http://www.fablab-berlin.org/de/e-textile-knitting-circle/ Flickr set >> http://www.flickr.com/photos/plusea/sets/72157633453846218/
July/August/September 2013, Nadelwald, Berlin Workshop to be announced… In this workshop participants will sew a fashionable bike jacket with integrated blink signals.
Crochet and Code
September/October/November 2013, Bratislava and Trencin, Slovakia To be confirmed >> http://col-me.info/
Dyeing Conductive Yarn
Conductive yarns are often in gray color which makes your project looks grayish. What if we color them in different colors so we can explore the aesthetic expression more freely, or match the conductive yarn color with the rest of the yarn to hide it completely? I have made a trial to dye the conductive […]
EL panel/wire inverter hack
EL panel and inverters are interesting material, but rather hard to control since it involves inverters with AC current. There are some nice tutorials on how to control AC side with triac or EL sequencer at sparkfun, buildr.. so on. But I always had a bit of problem when I want to fade them slowly, […]
Tinkering with Textiles & Electronics
Saturday 13 April 2013, 1-6pm, Betahaus, Berlin Friday 26 April 2013, 11:30am-4pm, Betahaus, Berlin as part of the General Assembly Artisan Weekend This workshops combines textile crafts, new materials and electronics to build interactive fabrics. Participants will be introduced to a range of conductive fabrics and threads as well as a selection of electronic components […]
Silent Pillow Speaker
This example uses an ATtiny microcontroller (programmed using arduino!) to playback a melody every time a head is laid on the pillow. The speaker is embroidered with conductive directly onto the surface of the pillow. A magnet is mounted directly behind the coil, inside the pillow is a knit pressure sensor that detects when a […]
ATtiny Programming Shield
This little circuit sits nicely ontop of an arduino board and lets you quickly plug in an ATtiny chip for programming using the Arduino “language” and IDE to write the code, and the Arduino board as an ISP programmer to upload the code to the tiny chip.
Soft & Tiny Pillow Speaker Workshop
Sunday 24 February 2013, 1-6pm, Betahaus Maker Weekend in Berlin, Germany This workshop is a good introduction to making soft circuits and writing some basic arduino code. Instead of learning how to program an Arduino, participants will learn to use an Arduino to program an ATtiny microcontroller, the difference being that the ATtiny microcontroller is […]
Amplified Pillow Speaker
An embroidered fabric speaker made into a pillow. Inside the pillow an amplification module hacked from a commercial device lets you easily connect your mp3 player to play back your favorite music. While the speaker might not be as loud as commercial speakers, you can very comfortably lay your head down on it to rest.
Still a work in progress…. Using an arduino or an ATtiny microcontroller to translate sound (from a microphone or an audio jack) into light patterns.
simple heat circuit
You can make a simpler heat controlling circuit using TIP122 transistor. The above image is the schematic. If you want to control a lot of heat lines, you can use shift register between arduino and input pin of TIP122. This method is not good if you turn on/off the heat in high frequency. TIP122 will […]
ATtiny: 7-Segment Display
This circuit uses the ATtiny 8-pin microcontroller which has 5 I/O pins to create a 7-segment display. Since a 7-segment display only requires control of 7 individual LEDs, we use 4 of the ATtiny I/O pins as charlieplexed outputs (n*(n-1)). Leaving the the fifth I/O pin to be used as digital or analog input or […]
Sound Amplifying Circuits
This post covers a few different (very basic) techniques for amplifying various sound sources. On the one hand sound coming from circuits inside toys that make sound (toy piano, singing greeting cards, recording and playback modules…), as well as sound made by generating frequencies using a microcontroller such as the ATtiny or an arduino board. […]