LittleMonster Speaker



After some successes and some big failures the little guy is pretty much done. Even though I didn’t succeed in using capacitive touch as the main interaction with the speaker I am happy with the final outcome.

Here is the link to my tutorial:



and its come a long way from the original set of sketches!

The concept: A fun and interactive Bluetooth speaker aimed at vinyl toy lovers.

The process began with a lot of sketching in an attempt to figure out a direction. I decided that I didn’t want to design a speaker that looked like every other speaker out there, I set out to have fun in this project and and in the process use this as an opportunity to expand my 3D modeling skills.

Once I chose the design I loved the 3D modeling process began. This was a big challenge for me since I’ve never been really confident with my CAD skills. I had never set out to model and build a form that needed to house electronics. My biggest worry was that I would screw up the measurements and end up with a 3D print that was too small to hold all the inner parts.


After taking apart the existing speaker I measured all the components and based my design around those measurements.

Once the 3D print was done and cleaned I began assembling and wiring the speaker. I was planning on using my Flora board and capacitive touch sensing to bypass the Pause/Play button. With capacitive touch sensing would the Flora would know when someone would touch the body of the LittleMonster and send a signal to a resistor** that would complete the circuit usually activated by pressing the button.

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What was supposed to be a relatively simple coding exercise quickly turned into a big challenge. Something that had been coded into the speaker’s original circuit board kept overloading and shutting down the entire system when I tried completing the circuit with the Flora. At first I thought that I was overloading the board trying to add all the new components at once, so I tried just activating the button using only the FLora and a simple code that would complete the circuit every 10 seconds. However, I quickly discovered that the speaker was previously coded so that if the pause/play button was held down it caused the speaker to disconnect the bluetooth.

After some consieration I decided that I needed to find another way to bypass the button that didn’t involve messing around with the existing board. From my success creating a simple switch for the Poopy-Light I decided to use the Monster’s body as a switch that would complete the circuit using copper tape.


LittleMonster Speaker III

Hey all!

Since we last saw each other I successfully printed the little guy and have focused my attention on the electronic interface. Even though my goal is a simple interface it has been challenging so far but I am headed in the right path.

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I am going to be using my Flora and capacitive touch sensing to Play&Pause the music. I am currently soldering really small wires to the existing board very carefully.

The Flora board will sense when the body of the speaker is touched and it will send a signal to the pause button to activate.

LittleMonster BlueTooth Speaker II

Hi all,

I have been doing a lot of research on the topic of building a Bluetooth speaker at home. I have found several tutorials on hacking existing speakers and combining them with Bluetooth wireless headsets to create a functional speaker. After talking to Richard in search for wisdom on this topic, he suggested that I should really consider hacking an existing speaker.

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This is the speaker I am going to buy and hack, I chose it both for its size and price.

I have been focusing on what the shape of the speaker. This has has been a challenge, since I want to follow a couple of design principles:

1. The design must be easy to assemble.

2. The design must not take up much space.

3. The design must be easily transported.

4. The design must be fun! 😀

Possible form:


I am planning on 3D printing the shell of the speaker (In ceramic perhaps). I have always been interest in learning more about the process and this is a great learning opportunity. I will continue to design the form.

See you all tomorrow!

Andres Iglesias Final Project: Speaker

Hi all!

For my final project I have been playing with the idea of designing a BlueTooth speaker system for cel-phones. I have been thinking of doing a project like this for a while now and with the skills I’ve been learning in class it finally seems like I will be able to actually make this concept real!

The idea is to design an open source speaker system that can be housed in different forms, giving the user the freedom to chose what this speaker actually looks like. For my model I will design and build the form of my speaker, however I want the set of instructions to be clear and simple enough to allow someone else to build and make their own out of whatever they want.

The speaker will work using BlueTooth to receive the signal from the phone, and I want the user to interact with it with tapping or sliding motions by using touch sensors.

The size of the design itself will be determined by the electronics that need to fit in it, however I want it to be small enough to be able to be moved around easily.

I will upload my doodles soon!



Tests and switch

Lots of experimenting with Arduino!


For the Button test video please check out my Instagram:

My switch was heavily inspired by Berk’s “awkward plush night light” but deals with a different yet still very awkward scenario. I designed this switch to light up an LED every time the toilet seat is down. This way I know that the bathroom is going to be used for an extended period of time. Also I know not to open the door since I’ve discovered my suite mate refuses to lock it.

Enjoy! 🙂

“Plush” Phone Case

Hi all!

I managed to delete my entire post earlier today, however, here is the process for my phone case!

wallet4 copy

I started with a concept sketch of the pattern I wanted to create. These are the materials I ended up using:

-Gray wool, leather, 1 Piezo electric disc, 1 blue LED, Arduino UNO board.


I started by testing out the pattern. I had never used to sewing machine and I knew it was going to be a challenge even though the pattern I drew up seemed simple enough. Getting straight lines in that machine was hard! I will continue to practice this skill for sure.

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I used the code from the “Knock” example as a base. I changed the “threshold” and the “delay” in hopes that the Piezo sensor would become sensitive enough to detect the cel phone’s vibration. Regardless of the code ( that works) it seemed that the vibrations of the phone alone wouldn’t trigger the threshold to go above 1.




Go to my instagram to see a video of me tapping the cel phone-case like a crazy man.

Thank you : )

Problem with acceleration.

Hi all!

This weeks challenge was a tough one! It took me a while to figure out what I was doing. The code was uploading fine once my computer found “Leonardo” 😛

However, it seemed that no amount of shaking was going to light up any LED’s on this cardboard. My stitched weren’t the best or tightest however I knew that the connection was strong from last class.  It wasn’t until I spoke to some of my classes that I realized the “Thresh-hold” was set too high and that if I dropped it down to a low number it would make the sensor very sensitive.  Below are photos and videos of the LED lighting up! 😀 Finally!

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IMG_2490These are some ugly stitches 😀

A very bright struggle.

Hi all,

I have never considered myself much of a techie guy so this process has been a challenge for me.

I began the experimentation process by going through the examples in the Arduino program, however, I could not get a set of two LED’s to turn on.

Frustrated; after a couple of tries, I decided to read this blog and see if that would help me in one way or another. I read and compared almost every set of code most of my classmates had played with (except Jung’s, I don’t own a toy I am willing to cut open, yet). 😀

Two of my failed attempts:

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That shade of orange might now be my least favorite color.

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finally, after what seemed an eternity, I was able to learn from Julia’s code! With her post I was not only able to make my own crowded little rainbow, but also play around with the speed at which the lights would change colors! Thank you Julia!



Below you’ll find a link to my Instagram account where I posted the video of my little success.

Thank you!

Tyvek / Prison Contraband


In prison, many activities and objects are considered to be contraband. Gambling, alcohol, and weapons (to name a few) are not allowed inside prison walls.  I began this design process by researching the material properties and limitations of Tyvek.

It melts (ish), it is hard to rip, and it repels water.

My initial sketches explored the idea of using Tyvek and a scrap material to fabricate a prison shank.


I set out to sculpt the form from a piece of scrap wood; small enough to smuggle and hide. The shank would serve as a fork as well as having a sharp end that would be either dipped or covered in melted Tyvek.  This would give the wooden fork a long-lasting sharp edge for cutting smuggled food or fruits. 😉


I began carving the fork’s shape using rasps and files; as well as the battle that was melting the Tyvek onto the wood.

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Below is the final form.






Thank you.