posts tagged with the keyword ‘attiny’

2017.10.12

NoiseMaster V

We’re moving along in the series with yet another noisemaker. This one features a control interface! Which is to say, there’s a potentiometer involved to alter the sound. This one is mainly wood with some pieces of HDPE added in. Originally I had the speaker mounted to the front, and it sort of looked like a radio, but for some reason I can’t remember, I moved the speaker to the back of the unit.

NoiseMaster V

Besides just having a button to activate the sound we’ve added a slide potentiometer. I grabbed a big pile of them from eBay years ago to have on hand, and I still have a lot of them around so I figured an audio project would be a good use for one. You may notice that the green button I used is a pretty close match to the green filament I used for 3D printing the potentiometer mounting plate. That worked out well.

NoiseMaster V

I designed the mounting plate so it could hold the potentiometer in place using two #4-40 bolts, which screw directly into the potentiometer to hold it to the plate. I then added four more mounting holes so the plate could mount to the enclosure. I kept those #4-40 for consistency. Again I’ve gone with the green PLA for the plastic parts, creating some interesting contrast between 3D printing with plastic and wood working. (And yes, there’s also blue HDPE pieces on this noisemaker.)

NoiseMaster V

Because the slide potentiometer needs to mount fairly close to the surface, and I’m using wood that is well over a 1/4″ thick, I had to chew out a bunch of the wood to make a big hole for things to work properly. I used some Forstner bits to make a rough slot in the top. Since the plate will cover it the beauty (or lack of beauty) of the slot didn’t matter much. (I’ve never really used Forstner bits in the past, but they’ve become a favorite of mine in recent years.)

NoiseMaster V

Our control interface, a button to activate the sound, and a slide potentiometer to alter the sound. I tried to position them for comfort when using two hands, though you can sort of operate it with one hand. The handle (knob?) for the potentiometer is also 3D printed, though it is covered in black Plasti Dip which gives it a nice feel when touched. I thought about making spares in case one “disappeared” during the show, but I never made more, and it did not disappear.

NoiseMaster V

The knob model had some rounded edges, and once again I’ll have to say I was pretty impressed with the Maker Select Plus at being able to handle it. It did take me a few iterations to get a knob that I liked, but this one turned out pretty well for a quick ‘n dirty project. It slid onto the potentiometer shaft very well as a press fit, and I felt pretty good that it would not have been easy to remove without some effort.

NoiseMaster V

And of course, one last hack… The screws I had were a bit too long for mounting the speaker as I did for some other noisemakers so I ended up hot gluing a white plastic puck behind the speaker to increase the distance so the screws would work. The puck was another thing I grabbed from the junk pile at work, because you never know when you’ll need some small white plastic pucks.

This is just one post in a series about noisemakers. Check out the other posts as well:

2017.10.09

NoiseMaster IV

The next noisemaker in our series is a bit more sophisticated in its construction and finish. This is the first one that features painted wood, and as a nod to what one of my design instructors used to call the “El KaBong” I added a large arrow pointing towards the button that the user is meant to press.

NoiseMaster IV

This one is also a “standoff enclosure” (is there another name for it?) where there is a top and bottom surface, separated by legs (or standoffs.) The standoffs were 3D printed, and I do have to say that the MSP did a good job. The standoffs for the speakers were also printed, and those required a bit more detail to work properly…

NoiseMaster IV

You can see in the model the small indent needed for the speaker to mount. This is due to the metal from the speaker mounting holes being present, and not providing a flush surface for mounting. There’s also countersink holes designed into the bottom of the legs, to allow the screws to sit flush. I do enjoy being able to model parts that fit exact, with the holes for screws the perfect dimension. As this whole project moved forward I found myself combining wood working with 3D printing, and I liked it.

NoiseMaster IV

I think it turned out well. I didn’t really plan for the “Xmas” colors, but I had green filament loaded up, so I just went with it. The speaker is from a weird set of car speakers I got from the Hack Rack at Milwaukee Makerspace. They were encased in a plastic enclosure that was not fun to tear open, but the speakers were nice, and worth the time…

noisemaster-0230

Speaking of time, while the first few noisemakers I built were quick ‘n dirty, this one looks like it took a lot more time. At this point I was working on multiple noisemakers, so I’d still have plenty to do while paint or glue was drying, or I was waiting for parts to 3D print. Once again, this one just has an ATtiny85 making the noise. At this point I still had a pile of ATtiny boards and kept stuffing them into noisemakers. (I did branch out a bit later, though.)

NoiseMaster IV

This is just one post in a series about noisemakers. Check out the other posts as well:

2017.10.06

The NoiseMakers (Part II)

In our introduction post I mentioned NoiseMaster 3000 and all of the noisemaking devices we built. We’re now up to number three!

This one has a more unique look, due to the material I used. I believe the “wood” is actually Bamboo, as this was an old cutting board that we replaced years ago. I didn’t toss it because I knew at some point I’d use it for a project. (See, I do have plans for those things most people just throw away!)

The NoiseMakers (Part II)

I also used some square dowels and a very small red momentary push button. Again, pretty much everything is exposed, though I did at least countersink the screws. The large hole was there when it was a cutting board, and I drilled speaker holes. and then used a countersink bit to give them an angle. (I think the rough edges are due to it being Bamboo.)

The NoiseMakers (Part II)

This one also features 3D printed parts. Little green standoffs were used for the PCB, and also for the speaker, so the screws could be the appropriate length. And once again an ATtiny85 powers the noisy noise. (This one is even more annoying than the previous!)

This is just one post in a series about noisemakers. Check out the other posts as well:

2017.10.01

noisemaster-0216

In our introduction post I mentioned NoiseMaster 3000 and all of the noisemaking devices we built. Well, here’s another one in the series.

While I used wood for the first one, I chose MDF for this one. MDF has some nice qualities, like being smooth and consistent in surface and size, but besides all that, it’s terrible. Actually, I should say that I’m terrible when it comes to working with it. It’s not like wood, which is forgiving, and I seem to split MDF whenever I use it. I find it annoying, so why not work with it for a project that doesn’t matter that much, so I can try to improve my skills a bit. Good idea, right?

noisemaster-0218

This one again makes use of an ATtiny (I have like 20 of them) and I sort of liked this design when I built it. You’ll notice in the photo above that the screws holding the speaker in place are at a weird angle. That happened in transport, and was not planned. They were actually straight when I built it, but being piled in a bin with a dozen other noisemakers and other things caused a little damage.

noisemaster-0219

You can barely see it, but this one introduces something that will show up in future posts… 3D printed parts. It’s just the standoffs in this case, since I used all the laser-cut standoffs for the last one. Again, all electronics and wiring are exposed, by choice.

noisemaster-0220

I used a lot of screw terminal blocks, typically for power input (though sometimes for speaker output.) Like anything you make, if there’s a chance someone besides you might use it (or if you forget things) add labels! I did not add the ‘+’ and ‘-’ to this, as I know that when I use two wire colors the darker one is always ground and the lighter one is always positive. Maks and Dustin didn’t know that, so they traced the symbols from the PCB and added the labels.

noisemaster-0221

This one once again remained pretty raw. I left the MDF as-is, and did not paint it or otherwise do anything to the surface. I was still just focused on building things quickly. (Don’t worry, that changed a bit as I built more of them.)

This is just one post in a series about noisemakers. Check out the other posts as well:

2017.10.01

noisemaster-3000

Around the end of 2016 I got some PCBs made that would hold ATtiny85 chips, and I used them in a sound installation. I was trying to figure out how I might reuse the piece(s) for Maker Faire Milwaukee, but I didn’t want to hang things, and I didn’t want to do the same thing again…

After I made SpringTime4 I thought about using the ATtinys in various noise-making devices, and so the journey began. (I also convinced Maks to join in and the idea for NoiseMaster 3000 was born. Oh, and along the way we recruited Dustin to join us.)

noisemaster-0211

I started digging up all the speakers I could find, and grabbed lots of wall warts from Milwaukee Makerspace, and I’ve always got scrap wood on hand, so I started building. At first I just slapped things together fairly haphazardly, but as I built more devices, I started making design choices. (You’ll see these in future posts.) In this post, we’ve just got a simple noisemaker. You press a button, it makes noise. (One of the criteria we set was that everything would be momentary, so no on/off switches. Sound could only be activated temporarily, so no one could turn everything “on” and then walk away. Sound should only be present when a person was engaged with it.

noisemaster-0213

In nearly all of the noisemakers I built, I chose to keep the wires and electronics exposed, or on display, as it were. If I used enclosures, they were typically open on multiple sides. Speakers were almost always visible. I didn’t stray too far from that aesthetic as I built things. Most of the buttons provided power to the unit, which started the noise, though later there were a few that used the button to enable the speaker. A subtle difference most people would not notice, but if you did, you probably know how microcontrollers work. :)

noisemaster-0212

I started working on the noisemakers in June, and thought that would leave plenty of time to make a dozen before Maker Faire. I came pretty close too, and along the way ended up doing some interesting things (at least I like to think so.)

I plan to write up posts showing each noisemaker (hence the “Part I” in the title of this post.) I’ll include photos and a short video, and notes about construction.

Enjoy the Noise!

This is just one post in a series about noisemakers. Check out the other posts as well:

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