Category Archives: DIY

GAMELÍN!

Finalmente, luego de realizarse en México y Colombia, el taller de Gamelines (dispositivos sonoros diseñados por el Labo de Juguete) se hace por primera vez en Buenos Aires, Argentina. Qué es un Gamelín? Es un circuito sonoro que ejecuta un versión de un escala musical indonesia, mediante la interacción del usuario directamente sobre la placa del circuito. De acuerdo al contacto físico del usuario, el circuito ejecutará una frecuencia determinada (a mayor cantidad de superficie de contacto, más alto el tono). Al pertenecer todas las notas a una misma escala musical, este circuito es ideal para ser ejecutado junto a otros iguales, logrando interesantes climas y contrapuntos.

Gamelín está basado en el uso del microcontrolador attiny45/85  , de tamaño y nombre pequeño pero con grandes posibilidades creativas. Durante una jornada súper-intensiva ensamblaremos y pondremos en marcha 15 nuevos gamelines. A continuación, la información del taller:

SÁBADO 19 DE MARZO (11 A 19HS.)

CASA ABASTO (ANCHORENA 632)

VALOR: $700 (incluye todo excepto batería 9V)

+INFO E INSCRIPCIÓN: LABODEJUGUETE@GMAIL.COM

A continuación algunas fotos del taller realizado en Cali, Colombia y un video de los gamelines en acción (en la Fonoteca Nacional de México ):

Haga click para ver el pase de diapositivas.

Antes de despedirnos les recordamos que el Gamelín es HARDWARE ABIERTO

 

 

 

 


GAMELÍN!

Making Spirit-Infused Beverages!

A bunch of members & friends of the Milwaukee Makerspace recently gathered to try our hand at something that does not mix well with all the heavy machinery at the shop: alcoholic beverages!  We attended a consumer cocktail academy hosted by Hendricks Gin at the Iron Horse Hotel, and we had a blast!

Check out our pictures:

Making Spirit-Infused Beverages! Making Spirit-Infused Beverages! Making Spirit-Infused Beverages! Making Spirit-Infused Beverages!

Cheers!

Chocolate Printer Cooling System Test

This week I attempted the first test of the chocolate printer cooling system.  The cooling system is intended to solidify the chocolate just after it leaves the extruder nozzle so that by the time the next layer is started it will have a solid layer to sit on.  The cooling system consists of a centrifugal blower with a brushless DC motor blowing room air into a styrofoam cooler containing a block of dry ice.  The air passes over the dry ice and gets chilled as the dry ice sublimates directly into very cold CO2 gas.  The chilled air and CO2 mixture exit the box through a port with a hose that will ultimately blow the cold air on the chocolate.  At least, that’s how it is supposed to work.  It blows air at -12C as measured via a thermocouple, but unfortunately, the air exit port ices up in about 2 minutes and blocks the air flow.

There are many possible solutions.  I can add a heater to the exit port to prevent formation of ice, or dry the air going into the box using a dessicant cannister or maybe just use water ice instead of dry ice if the higher temperature will still cool the chocolate adequately.   Maybe using an old miniature freezer with an air hose coiled inside would do the job.  It would be really interesting if I could use the waste heat from a freezer to keep the chocolate liquified and flowing.  Back to the drawing board!

Custom Police Badge

I was a “Grammar Police” officer for Halloween this year.  My costume consisted of some standard police equipment, as well as a dictionary, thesaurus, citation tablet, red pens, and, of course, my lovely custom badge!

 

Step 1: Design.

I scoured the web for pictures of “grammar police” shields, but ended up creating this design in Microsoft Word, using clip art from the web, generic shapes from Word, and shaped text boxes.  It was pretty simple and used the software I had readily available.  The portions of the design that are solid black are the parts that will be etched into relief during the process.

 

Step 2: Create!

With much encouragement & assistance from a fellow Makerspace member, Jon (of Dalek Asylum fame), I crafted this badge using mostly jewelry-making tools & methods.  We first spray-painted a square piece of copper, then used the laser printer to burn away the paint from the sections that were solid black.  This gave us access to the “fields” that would be eaten away in the etching process, giving the piece segments of relief.

After some clean-up (note to self: don’t use abrasive cleaners at this step next time!  and maybe not industrial spray paint, either), we left the copper square to soak in ferric chloride for approximately 45 minutes.  We checked the progress of the etching every 15-20 minutes, and decided that after 45 minutes we had enough of an etch to give the details enough depth to stand out.

After more cleanCustom Police Badge-up to remove the ferric chloride & remaining paint, I had a nice, shiny, scratchy piece of copper with an etched design.  At this point, I really started finding my way around the jewelry bench.  I used a small jewelry saw to cut along the outer lines of the badge, which was frustrating until I found the right rhythm for cutting.  My badge was finally starting to take shape!

From here, I filed the edges smooth & buffed the finish to remove some of those fine scratches.  I gave the piece some dimension by using tools at the jewelry bench to accentuate the “belly” at the bottom of the shield.  Once it felt reasonably even and I was happy with the general appearance, we applied a liver of sulfur gel to the surface of the badge.Custom Police Badge

The liver of sulfur settled nicely into the etched corners, giving the piece an aged patina and highlighting the small details.  I really like how it settled into the fine lines left by the etching solution around the perimeter of the main field!  The small striations in the copper there give it a very unique appearance.  The patina provided by the liver of sulfur also helped hide some of those fine scratches I mentioned earlier.  We wiped off the excess & applied a museum-quality wax, since the badge will be worn and handled like jewelry, to maintain the patina.

Step 3: Profit(?)

The badge was added to my collection of Grammar Police equipment, which included shiny aviator sunglasses, and a tactical belt (excess nylon webbing with a clasp) with a dictionary, thesaurus, red pens, custom grammar citation padlet, and toy handcuffs.  It was quite the fun costume, and even though none of my trick-or-treat’ers understood, all my friends did!

Custom Police Badge

 

Thus ends the story of my first Makerspace project.  Oh, what fun it was!

El labo de viaje

Invitado por VIDEOSÓNICA, el labo se hizo presente en Cali durante la segunda semana de octubre para brindar una nueva edición del taller GAMELINES. Durante dos días y en dos sedes (el hermoso Lugar a dudas y la Alianza Colombo Francesa de Cali) construimos nuevos gamelines y compartimos el amor por la electrónica y los microcontroladores.

El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje El labo de viaje

 

 

Muchas gracias, Carolina Carvajal, Mariángela Aponte Núñez, Giovanny Terranova y todo el equipo de Videosónica por toda la hospitalidad y ayuda en la estancia en Cali!

Recuerden que Gamelines es hardware abierto. Acá encontrarán información sobre cómo programar el chip que se encuentra en el corazón de la placa.


El labo de viaje

Chocolate Cooling System Almost Ready For Testing

Chocolate printer progress continues.  This week was devoted to the print cooling system.  The chocolate will come out the extruder nozzle in a semi-molten state.  It needs to solidify by the time the next layer of chocolate gets deposited on it, and I’d prefer it doesn’t drip or sag, so it needs to be chilled right after extrusion.  The current plan is to blow chilled air over the chocolate just after it leaves the extruder.   The chilled air will come from a foam insulated box containing a block of dry ice.  There will be a blower pushing air into the box and a hose delivering the chilled air/CO2 to the print.

A couple weeks ago I got a blower from American Science and Surplus and this week I got it running by using a model airplane ESC and servo tester to drive its brushless DC motor.  It appears to be capable of blowing much more air than I’ll need.  There are many unknowns yet to test.  How much chilled air/CO2 will it take to solidify the chocolate after it leaves the extruder?  How long will a block of dry ice last when used this way?  Will ice build-up inside the chiller box adversely affect its performance?

I designed and printed three parts for this system- a mount to attach the blower to a foam box up to 1.5″ thick, a hose coupler to allow delivery of the chilled air/CO2 to the print, and a hole saw to cut holes to fit the other two parts.   The printed parts fit as if they were designed for the job!

3D printed hole saw

Chocolate Cooling System Almost Ready For Testing

Hose connected to hose coupler

Chocolate Cooling System Almost Ready For Testing

Hose coupler parts

Chocolate Cooling System Almost Ready For Testing

Blower mount for air chiller box

Our New Laser Cutter!

The new laser cutter station in our classroom.

We are very happy to share that Hive76 is now home to a 45W H-Series laser cutter from Full Spectrum Laser! Members now have the capability to cut complex 2D shapes in wood and plastic in thicknesses up to 0.25 inch. If you can draw it on a computer, the laser can cut it. It’s great for engraving too:

Our New Laser Cutter!

Hive76 rocks!

We’ve just begun making test cuts and machine break in. Our next step is to develop a class for members to become laser cutter certified. I can’t wait to see what kind of cool projects our members will use this tool for. In the mean time, stop by our open house Wednesday nights 7-10pm to see it in action and find out how to become a member!

 

 

 

Our New Laser Cutter!

Laser guts.

 

 

First Ever Test of the 3.5 Liter Syringe Extruder

My last post showed how I made a plunger for a 3.5 liter syringe.  Today’s post is the results of the first ever test of that syringe assembly including the plunger.  The goal of the test was to determine if the syringe pusher would be able to push very thick, viscous paste (sort of like melted chocolate) out of the 1/4″ syringe nozzle.  It was also a test of the ability of the previously made silicone plunger to maintain a seal even against whatever pressure develops inside the syringe as it is pushing.

I mixed about 1 liter of extra thick pancake batter to a consistency that I thought would be much thicker than molten chocolate (pancake batter is much cheaper than chocolate) and shoveled it into the syringe, then bolted on the pusher and hooked it up to a power supply:

Looking back, I probably should have loaded the syringe from the other end.

Syringe loaded with super thick pancake batter.

 

 

 

 

 

 

 

 

 

 

 

Here’s the actual test.  It gets especially interesting about 1 minute in:

The syringe continued drooling after power was removed due to air that was trapped inside the syringe.  As the plunger pushed, the air was compressed.  When the motor stopped the compressed air continued to push out the batter.  I will have to be careful to eliminate air bubbles in the material when it comes time to use this in a printer.

It only took a couple minutes to clean out the syringe after the test was done.

The pusher did its job much better than expected, and the plunger held up just fine, too.  I feel confident that this device will be able to extrude chocolate.   Now the real work begins…