Quick 555 PCB for bending

by Jimmie on February 11, 2011

555pcb I started working on a schematic for the 555 looping circuit, and I ended up doing a PCB for it as well. You can download the files here. My plan was to hopefully etch and test out the board today, but those plans got delayed. I’ll probably give that a shot tomorrow. I’ve gone ahead and uploaded the PCB files I’ve been working on. It’s only at v0.5 till I test the board out. I’m also going to play around with the silk screen, but the layout probably won’t change, as I can’t see anywhere to reduce it further and still keep it single sided.

The PCB measures 1″ x 0.7″ and is single sided to allow for home fabbing. I could make this smaller with SMD parts, but it wouldn’t be single sided any longer. One position on each pot isn’t used, but I left them in there, as they could be used for strain relief instead. The diode is completely optional, as that causes the 555′s duty cycle to stop being 50%.

What that means, is that sometimes you want to press a button for a very short burst between longer pauses. Or have the button press for a long time between short pauses. Sometimes it doesn’t really matter, and you just want a square wave. In any case, you can change the configuration with this design. The diode also runs through a switch position, so that you can have an external control for it.

I also left a spot for an external trigger. That would allow you to hook this up to some kind of external circuit, like a sequencer or midi board. You’ll need to cut a trace for that, and the trigger voltage will have to be at least the same as the reference (which is currently tied to VCC). The trace you’ll cut is the one from TR to the 10uF cap. I’ll probably do a run of these if it works out, in which case I’ll make the side that needs to be cut.

I’m currently using two 100k pots to modulate the time. R2 is actually the left one (I should probably label them), and R1 is the right pot. If you want a simple oscillator, then just use a standard 10k resistor for R1. You can change both pots as well. Larger pots will give you slower rates, and smaller pots will give you quicker rates. You can also change out the 10uF cap to change timing as well. These are the values I found good for triggering simple toys.

555pcb I also did a quick PNG file for etching. You can either get it from Flickr, or from the PCB files. It’s high res, but should only be 1″ x 0.7″. If it isn’t then you’ll need to re-size it as well. The file has been mirrored, so this is actually the bottom layer as etched from a single sided PCB. Please let me know how yours turns out and what you do with it.

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Triggering the Sing-A-Ma-Jig with a 555

by Jimmie on February 10, 2011

Wow, just wow. The 555 worked like a charm. I didn’t even need a transistor for it, which I mentioned in the previous post. I used a simple 555 timer to get it to loop. Turns out that Btn1 just need to be dropped to ground, and then it signals a button press. Luckily, the 555 output was designed to either sink or source current, so it can be used directly without a transistor.

This thing is so fun. You can even listen to me playing with it. Seriously, this thing is going to be great.

I’m using a TLC555CP from TI, which starts with a voltage as low as only 2v! What that means is that I can power this off of my 3v toy. My favorite page for basic 555 information is located here. I’m using the astable configuration with a greater than 50% duty cycle.

IMG_0438 I’m going to do a proper post on this later to fully explain what all this is doing, and how to use it with other toys. For now I’m having fun playing with it. I’ve also done three blog posts today, in short succession. I’m going to go and grab some food now, then I’ll probably do up a proper schematic in Eagle. I will probably do a PCB for this as well, since it’s extremely useful. I’ll actually submit that for the 555 contest.

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Sing-A-Ma-Jig is a creepy toy!

by Jimmie on February 10, 2011

IMG_0357 Holy crap, I can’t believe they make this thing for kids! Even without the molestache(which I printed out), it’s still creepy.  It’s also quite ripe for bending. The thing is called a Sing-A-Ma-Jig, and I got mine at target while in NYC a few weeks back. I even opened it up that night and just used my fingers to see if it was bendable, and it is indeed.

This post is something that should have been posted yesterday, but I sort of started hanging out with my roommates. Then beers got involved, and then motivation was thoroughly lost. The previous two days was a combination of sleep deprivation, workshop preparation, visiting of friends, and travel. Seriously, I didn’t do anything creative for those two days, and I was running on only a few hours of sleep a night. That really tends to sap my creative energy. I’ll post a few projects after the month is over to make up for it.

This post is about the exploration of the toy, and how I go about finding fun points to bend. I made a quick video, and I also uploaded a bunch of pics to my Flickr. Behold, the first video:

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Open Source Hardware Definition 1.0

by Jimmie on February 10, 2011

The Open Source Hardware definition has reached v1.0! I’m proud to say that all of my kits fully comply with the definition, and will continue to do so in the future. I feel very strongly about the free culture movement, and believe that it is the best way of going about things. Knowledge and digital resources should be free.

I actually learned electronics through exploring things online. If people would not have posted their projects and code for me to learn with, then I would probably still be doing systems administration. I would have still bought kits and soldered them together, but I would not have progressed as quickly as I did if the resources had not been available online, open source, and free.

That is why I’ve allowed for commercial use in my licensing from the start, and I’m glad that it’s in the OSHW definition. Basically, hardware costs money. If you can’t at least make the money back for your project, you are far less likely to move beyond a small production run. That means that anyone can also download my source, and create kits that directly compete with me. However, they are then held to the same license, and must release the modified source as well.

That allows for a project to progress very quickly. I’ll admit it, I get board of things if they aren’t new or interesting, so it’s good for others to keep me on my toes, and it keeps me creating instead of just sitting on my laurels. It also means, that if someone moves into my space with an improved kit, that I can incorporate the improvements into the main project and then sell a better product myself. This is a market where first-seller has a distinct advantage.

The most common question I get asked is about larger kit makers taking my design and selling it. I’ve been approached by some of them, and they actually just buy the kits from me instead of kitting it up themselves. Theoretically if I’m doing my job and meeting market demand, then even large sellers are going to have a hard time getting into the market at the same volumes, and volume is how I make money with my kits. I’m just a small seller, but I’m making enough to live on and travel around the world.

In short, I make a living giving away my intellectual property, and I make enough money to live on plus travel around the world. I don’t make nearly as much as I did as a systems administrator, but I can honestly say that I love what I’m doing. I’m also constantly inspired by the others who are involved in the movement, and I’m extremely happy that I’m able to continue doing this.

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Modular Dice Tower

by Jimmie on February 6, 2011

I totally failed to get a post up today by 7pm (that’s what I get for taking a “nap” at 5pm). I also failed to finish anything substantial, as I was hanging out with a good friend all day, and only spent about an hour in sketchup before taking my “nap”. I did come up with the idea of having a Makerbot printable modular dice tower design though. This is the base section of it. It’s three inches wide, with a wall width of 1.5mm.

Here you can see the slanted module. I only really completed the template piece and this one. I had started on the bottom one, but wasn’t even close when I decided to “nap”. The slope of it should print just fine without support, so I can print it hollow. I’m much better at judging printable designs as opposed to laser cut-able ones.

Most of my creative efforts were daydreaming today, but I’m honestly inspired to finish up some more of these and print them when I get home. I’ll post the full set to Thingiverse before that though. I enjoy traveling around to different hackerspaces, but I can’t wait till I get home and have access to my tools and parts. I prefer physically making things more than digitally designing. A mix of the two is nice, but at the moment all I have with me is my laptop and LoL Shields.

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Dice Tower

by Jimmie on February 5, 2011

I didn’t want to do another LoL Shield project today, mostly because my whole front page is nothing but LoL Shield posts. So I decided to do something I’ve been wanting to design for some time, a dice tower. I have thrown it up on Thingiverse. The image above is just a quick render in sketchup, the actual file is an SVG that you will laser cut out of an 1/8″ material. I won’t get a chance to cut this out for a while, so if you do, please let me know how well it goes. I hope to add some art and flourishes (turrets, etc). I also can’t wait to try it out with a game that uses tons of dice!

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Ten Second LED Belt Buckle

by Jimmie on February 4, 2011

IMG_0398

The Diavolino from Evil Made Science is hands down my favorite Arduino clone. It’s the only one I sell at workshops, and it works extremely well with the LoL Shield. So much so, that it is my official recommendation as THE Arduino to use with the LoL Shield.

Why do I love it so much? It’s cheap, so you can dedicate the Arduino to the LoL Shield or other project. Since you build it yourself, you can simply choose to leave out the pin 13 LED, which gets rid of the ghosting. It also has a really low profile, so it works great as a belt buckle. Which I usually wear around at conferences.

I ran a workshop last night at Unallocated space, and one of the members flat out bought one of my pre-soldered examples (white one with the Diavolino). No-one has ever done that before, but next time I’m charging more than $110. So that basically made my project today re-building the kit I show off at workshops. Since I had to re-build a Diavolino, I decided to do a quick instructional page for the slight modification as well. The instructional page is much closer to my project than this post, but I’m combining them, as I spent most of my non-travel time today building the white shield again.

IMG_0412 The only modification for a belt buckle would be the removal of the reset button. I just don’t solder it in.

IMG_0413 Look at how much room there is!

IMG_0414 I usually wear the actual buckle off to the side. My shirt generally hangs over it, so it doesn’t really show.

IMG_0415 You can actually see the wear my belt has had from all the LoL Shields.

IMG_0416 Bam! Ten second belt buckle (minus assembly time).

IMG_0417 Here it is playing a very interesting video. On my belt.

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Updated LoL Shield Video

by Jimmie on February 3, 2011

http://www.youtube.com/watch?v=sWpqH37Zb9M

Since it’s been a while since I updated my LoL Shield stuff, here is a new video explaining it a bit. It’s mostly for the official LoL Shield page. Basically, my project for the day is doing stuff I should have done quite a while ago. Kind of lame for a project, but it’s something that needed to be done, and I didn’t have much time today between traveling and setting up for a workshop.

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Base 12 Clock

February 2, 2011

So I couldn’t let the whole clock thing be after my perceived failure yesterday. This time I went with a conceptual clock that I would write the display myself. What I came up with is a fairly good indicator of time at a glance, but takes a bit to get the exact time down. The [...]

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February Project Month

February 1, 2011

Like many folks on the interwebs, I’m going to be doing a sort of project a day thing. It’s mostly to get me back into documenting my work, and posting new content to my website. It came around when one of my roommates, Keith Simmons, quit his job and started hacking full time as well. [...]

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