ATtiny LED Letter Keychain Kit

 Jo Hinchliffe writes on the Tindie blog:

ATtiny LED Letter Keychain Kit

If you have tried your hand at soldering and want to progress to soldering with surface mount devices (SMD), this LED keychain kit might be just the ticket!

The kit is comprised of a tiny PCB featuring a grid of pads onto which you solder some of the 15 SMD LEDs supplied. You can use as many or as few as you need to make your chosen letter or icon. Arranged as 3 columns of 5 LED’s you can make any letter you require. The ATtiny micro controller can be supplied pre-flashed with the project code and once assembled the keychain has four display modes, all on, slow blink, fade and fast blink. Of course the code is provided in the documentation and you could always create your own patterns for the device.

You get a choice of LED colour when ordering and we think this is a great way to practice your SMD soldering or a nice kit to put together as a gift for someone.

ATtiny LED Letter Keychain Kit

New Charmware PCBs by Alex Glow

Screenshot from 2018-08-29 13-45-30.png
Alex Glow from Hackster posted an update on the Charmware modular tech jewelry system:

New Charmware PCBs from OSH Park! (Pt. 1)

Sweet, a package from OSH Park! Time for an unboxing! Plus, see how to upload and order your own boards.

New Charmware PCBs from OSH Park! (Pt. 2)

Visit for more information on the project:

Charmware // Modular Tech Jewelry System

These mini PCB beads (PCBeads?) help you build wearable electronic circuits!

New Charmware PCBs by Alex Glow

HDDG 32: Stimulating Communication Through Titillating Wearables

Bradley Ramsey recaps HDDG from last week:


HDDG 32: Stimulating Communication Through Titillating Wearables

Sarah Petkus takes the stage to discuss her ongoing project, which measures and indicates human arousal using stylish wearables


Sarah’s talk entitled SHE BON: Using Body-data to communicate the intimate and the unseen, discusses her work on a unique new project aimed at encouraging communication around human sexuality. Sarah is a kinetic artist, roboticist, and was recently called a transhumanist, which fits really well once you’ve seen her presentation.

The term refers to an intellectual movement that seeks to elevate the human condition both mentally and physically through the use of technology. Sarah’s talk begins with her origins, which were rooted in feelings of powerlessness.

So, she did what any maker would do: she built a robot army. With the help of her colleague, she built an army of 100 delta robots that you control with physical gestures.

HDDG 32: Stimulating Communication Through Titillating Wearables

Sarah Petkus: Using Body-data to communicate the intimate and the unseen

Awesome talk by Sarah Petkus for HDDG last night at Supplyframe in SF:

Using Body-data to communicate the intimate and the unseen

Sarah Petkus is a kinetic artist, roboticist, and transhumanist from Las Vegas, who designs electronic and mechanical devices which encourage reflection regarding the human relationship with technology.

Their talk will be about a series of wearable augments built to facilitate in sensing, tracking, and indicating one’s level of excitement (or arousal)! Each of the wearables uses a variety of sensors as input to influence quirky electronic and mechanical devices of my design as output. The goal in doing so is not only to create a stellar suit of electronic armor (or amour), but also to help facilitate a dialogue about sex and intimacy amongst my peers that is relatable, honest, healthy, and fun.

Follow Sarah and her projects on Patreon:Screenshot from 2018-07-13 13-00-51.pngSarah Petkus is creating ROBOTS

Sarah Petkus: Using Body-data to communicate the intimate and the unseen

ATTiny wearable by Facelesstech

tl;dr It’s a foundation for a wearable platform. It’s a Nato watch strap threaded through a PCB with a coin cell battery holder between the PCB and the strap. I’m using a Attiny85 this time around but could be used for most chips/dev boards. This is a proof of concept to iron out any problems […]

via Attiny wearable — Facelesstech

ATTiny wearable by Facelesstech

Audio Reactive Kitty Ears

Screenshot from 2018-04-10 12-04-10

Mary Etta West at SparkFun has remixed Anouk Wipprecht’s Kitty Ear project to make it react to audio:

Audio Reactive Wearables

At the beginning of this year I began prototyping an audio reactive headband to wear in my everyday life, like while dancing with my dog in my lab listening to Legend of Zelda dubstep.

Screenshot from 2018-04-10 12-07-34.png

 A few weeks ago I saw this post by my favorite Engineer/Maker/FashionTech Designer/Roboticist Anouk Wipprecht – a kitty ears soldering project with 3D-printed headband. I immediately ordered the Electronic Kitty Ears Headband from Shapeways, and after more digging around I found the Instructables tutorial for the kitty ears soldering project. The tutorial includes the BOM, the .stl files for the headband and a link to the OSHPARK shared project.

I downloaded the gerbers and exported the dimension layer as a gerber by itself. Then I imported it to the dimension layer in EagleCAD so I knew I had the same dimensions and my circuit would fit in the Kitty Ears headband. You can see the prototypes in the first picture. In a day I captured the schematic from the original prototype circuit and laid out the PCB design in the Kitty Ears form factor.

The design files and source code are available on GitHub:


Audio Reactive Kitty Ears

Cyborg Ring

From zakqwy on


Cyborg Ring

cordwood + smt + jewelry + blinkies + zinc-air batteries

This project evolved from Splinter, the SMT cordwood project I did last summer/fall. The ring is powered by tiny size 10 hearing aide batteries which should give 4-6 weeks of intermittent use, once I come up with a design that doesn’t break after a few days of wear and update the firmware to put the ATtinyx5 to sleep. The first rev (labelled ‘blink-ring’) used deep red 650nm LEDs. Searching for particular component lengths gave me an excuse to use strange 0508 resistors. And somehow, this is my first Charlieplexing project. Yaay novelty soldering!
Cyborg Ring

OSHWi Octopus Badge by Gustavo Reynaga

Alex Glow of takes a look at the OSHWi octopus badge designed by Gustavo Reynaga:

Screenshot from 2017-12-23 09-39-22.png

The design files and source code are available on GitHub:


GReynaga has shared the board on OSH Park:


Oshwi Badge HACKSTER Version Rev 1



Order from OSH Park

OSHWi Octopus Badge by Gustavo Reynaga