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Category: making things

The Brew Hauler

This past Saturday when I stopped at Cap N Cork to get some brewing supplies I also bought a Brew Hauler. This low-cost (~$12 or so) strap system made out of nylon webbing fits around a carboy making it much easier to carry. Instead of having to carefully lift a full (and potentially wet) carboy and hug it while carrying it around the house I can now just lift the nylon straps and carry it.

This worked well on the initial test of carrying a carboy of Chocolate Milk Stout from the laundry room into the bathtub where it’s fermenting, and I suspect it’ll work well after that. While looking up info on the product I did find this report of it not working right for one person, but I suspect that they didn’t have it set up quite right, resulting in the carboy sliding out one side of it. I’ll keep a careful eye on it, but it seems like it’ll be just fine.

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Public Domain Mountain Bike Trail Courtesy Yield Sign


 
Public Domain Mark

In mountain biking literature it’s common to find graphics which replicate a yield sign and indicate that, as a courtesy while riding trails, cyclists should yield to both hikers and equestrians. I recently found myself needing one of these graphics for a map that I’m working on, and while it’s easy to find small raster (PNG, GIF, etc) versions online I was unable to easily locate a vector copy, much less one that had a license allowing free reuse. So, I made one myself and it’s available as public domain for anyone to reuse.

This graphic, as seen above, can be downloaded from here in EPS format: mtb_trail_courtesy_yield_sign_v1.eps

In making this logo I used cyclist, hiker, and equestrian graphics provided by the National Park Service as part of their Map Symbols for NPS Maps. Being released in October 2011 these are as up to date as possible. Curiously, these symbols have just one symbol for “Bicycle Path” which seems to combine all cycling routes under one symbol.

I believe this artwork (mtb_trail_courtesy_yield_sign_v1.eps, MD5 checksum 4aac401c347b80675a673e756a604480) to be free of known copyright restrictions and I am thereby releasing it into the public domain. If this artwork is reused elsewhere a citation (to Steve Vigneau / nuxx.net) would be appreciated, but it is not necessary.

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Mukluk Fork Light: First Draft

As mentioned a month ago I had the parts laying around the house for fitting a Philips commuter bike light to a rigid fork crown. I’ve poked with this on and off over the last month, including taking some time to cut a water bottle to hold the battery and fill/fashion the top of it with leftover GREAT STUFF foam. Tonight I finally put together the power supply, built the wiring harness, mounted a bottle cage to a fork, and put it all together.

This looks like it’ll be a pretty good auxiliary light for winter riding; something to provide some nice, low-angle light to increase contrast / shadows. It’s listed as being ~100 lumens, and being a European commuter-style light it’s designed to cast a rotated D-shaped light, illuminating only the pavement and not shining in other riders’ eyes. Being mounted just above the Mukluk’s large tire this casts a decent-sized shadow, but I don’t think that this’ll be a problem when riding. I’m now just looking forward to the trails freezing so I can get out and try this.

To put this together I used the following items, all of which were sitting around the house unused, generally left over from other projects:

· Philips SafeRide BF60L60BALX1 Light
· Tenergy 14.8V 3Ah LiPo Battery Pack
· Sure Electronics PT-PC021 Step-down Power Supply
· Cannondale Water Bottle
· Random Fasteners
· King Cage Bottle Cage
· Silicone-insulated Stranded Wire
· Cable Ties
· Hot-Melt Glue
· Neoprene Sheet
· Left-over GREAT STUFF (Yes, I was somehow able to save a can and get it dispensing again by removing the nozzle…)

I’m not sure that I’ll stick with the fork mount for the battery, but wanting to keep the main bottle cage empty it seems to be the best option. I also might modify the battery holder to be a bit more solid, but right now I’ve got the power supply wrapped in neoprene which nicely holds the battery in place. This results in nothing rattling around and everything working pretty well, so we’ll see where it goes…

UPDATE: Runtime tests show a little over six hours runtime off of one charge. The setup has also been proving quite durable and reliable. I may switch to a smaller battery and a more permanent mount, but for now this setup seems to be working wonderfully.

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CRAMBA’s Addison Oaks Mountain Bike Route Map

For a while now I’ve lamented that, while they do a nice job of illustrating the whole of the park, the park provided maps for Addison Oaks don’t show the mountain bike trail route very well. After a meeting with park management it was decided that a new map of the MTB route would be nice, and over the last week I spent some time gathering GPS data at the park and drawing up the map you see above: CRAMBA‘s Addison Oaks Mountain Bike Route Map.

When drawing this map I was working with the following intentions:

· Make the MTB route easy to find for new users to the park.
· Provide sufficient landmarks (mile markers, water tower, RC plane field, cell tower, lakes, etc) to make it easy for a new user to locate themselves along the route.
· Illustrate where the MTB route interacts with other marked routes, such as equestrian trail crossings and segments shared with marked equestrian and hiking routes.
· Allow the map to be used alongside the park-provided maps by including common reference points.
· Produce a map that is readable when printed in B&W or color.

I think that this map meets these intentions. There will, of course, be versions released after this as stuff changes around and points for improvement are identified, but I’m pretty happy with the result thus far. Hopefully others will find it useful.

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Vector Symbols for Maps

Ever been drawing a map and found yourself needing vector copies of symbols? Well, thanks to the great state of Minnesota there is a font containing most of these symbols freely available. On the state’s page Recreation Symbols Extension for ArcView one can download recreate.ttf, a 126-character TrueType font containing indicators for everything from XC ski trail difficulty to lighthouse locations and from winter camping sites to RV dump locations.

To make using this font easier I’ve created a spreadsheet-based key listing each of the symbols next to their corresponding Unicode character. This can be found here: Minnesota DNR Recreation Symbol True Type Font Key.xlsx

There’s a few other nifty things that Minnesota has provided to the general GIS community, including Road Symbols. The rest can be found here.

UPDATE: Here is another set of symbols provided by the National Park Service (NPS). These are much more up to date and provided as both PDF and .AI files.

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Broken Garage Door Closed Sensor

This evening I was tightening and adjusting a few bits on my garage door when I noticed that the plastic garage door closed sensor was bent to one side. Upon touching it and applying a bit of pressure to bend it back it snapped off, rendering the opener incapable of detecting when the door was closed. The result was that the door would close, hit the pavement, press hard, then reverse making it impossible to close the door without stopping it manually.

Wanting this fixed I hurriedly grabbed some scrap aluminum (left over end panels from the SDrive NUXX) and fashioned a new lever with a slightly different spring retention system. As rebuilding this required drilling out the original pivot rivet I had to use a screw in its place, but hopefully this will work out fine. I also applied some UHMW polyethylene tape to the edge of the lever in hopes of keeping it from abrading the sled which presses against it. Some nail polish was also used as thread locker (because I couldn’t find my Loctite) to hopefully keep the assembly together.

A photo of the resulting assembly can be seen here, and thus far it’s installed and working fine. Hopefully it’ll continue to work well and the old, low-quality plastic part will have a permanent replacement.

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Future Snow Bike Light?

This evening while straightening up the basement I decided to play around with combining parts from two previous projects (a commuter light picked up at the MMBA Expo and the Bicycle Video Recorder) and it seems to work. I’m able to use the rather large LiPo battery and voltage regulator to get the requisite 6V, and it seems to power the light nicely.

The light should be mountable on the crown of the Mukluk, so maybe I’ll put this to work as a low-mount night riding light for winter use. I’ll just have to sort out the battery mount, but that shouldn’t be a big deal. Yay, another project!

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Low-Cost Fat Bike Stand

 

 

  

 

 

 

 

With the acquisition of a fat bike I needed a way to store it standing up in the garage but my favorite rack, Feedback Sports’ RAKK, won’t work with a tire this wide. So, I set out to build my own. The result is what’s seen above, a collapsable stand which holds the rear tire at the bottom in a channel and at the top/sides to keep it from tipping over.

There are some other PVC rack designs floating around online, most similar to this one from Bogley Outdoor Community, but they all seem to have derailleur or brake rotor interference issues to one degree or another; see this photo for one example. By building an L-shaped stand I was able to completely avoid this.

The rack also has a lip extending off the back of it which serves two purposes. First it keeps the rack from tipping backward when pushing the bike into it, and second, by jutting out just a bit further than the rear tire, it keeps the stand just far enough from the wall that the rear tire doesn’t touch. Thus the bike can be inserted into the rack by pushing the whole assembly against the wall (without holding it), and it keeps the rack from inadvertently being unusably close to a wall. This latter point is a problem with the Feedback Sports RAKK, as if it’s sitting too close to the wall the bike cannot push the spring loaded arm backward and the rack must be slid away from the wall before a bike can be inserted; a bit of a hassle when the rack is set close to others in a small garage.

 

 

  

 

 

 

 

Total parts cost for this project was US$13.08 (after 6% Michigan sales tax), purchased at Lowes, not including incidental supplies or tools:

1″ Schedule 40 PVC Pipe:
· 1x 10′ Pipe
· 4x End Caps
· 2x 90° Elbows
· 8x Tee

Presuming a 7/8″ inset in each fitting the 10′ piece of pipe is then cut into the following size segments:

· 10x 4.25″
· 2x 24″
· 2x 11.25″
· 2x 1.25″

If your pipe fittings have something other than a 7/8″ inset or if your tire size is a fair bit different from mine you’ll want to adjust these lengths as necessary to ensure that you’ve got the appropriate distances between support pieces. The spacing that I found to work for my Salsa Mukluk 2 with a Surly Rolling Darryl rim and either an Endomorph or Larry tire has a base rectangle with inside dimensions of 4.25″ x 11.25″ and an upright with a 4.25″ x 24″ opening. Bikes with narrower (or wider) rims or tires may require this opening to be adjusted.

 

 

  

 

 

 

 

I did all of my cutting with a hacksaw or bandsaw, depending on which was more convenient. Once all pieces are cut the ends need to be deburred and slightly beveled with a file or razor blade. Before assembly I also scrubbed the colored labeling off with some acetone and paper towel, but this isn’t a necessary step. If doing so caution must be taken as the acetone dissolves / etches the PVC, so one should be careful not to damage the surface or let it pool. It is also extremely volatile and flammable and thus any cleaning of this sort should be performed outdoors.

Assembly proceeds as pictured here, with all items cemented in place except for the where the upright meets the base. Parts were liberally coated with PVC cement (no primer, as this doesn’t need to hold water), and before this could set the parts were tapped into place with a dead blow hammer, measured with a ruler to ensure appropriate gaps, and aligned by pressing the parts against a flat surface. I found it was easiest to assemble the short cross pieces first, then fit the longer pieces, then the legs, and finally the end caps.

 

 

  

 

 

 

 

The resulting stand works out very nicely, solidly holding the bike by either the front or rear wheel. This integrates well with the row of RAKK-supported bikes in the garage, and now I don’t have to lean by bike against a hose holder, garbage can, or wall. I’m quite happy with how it came out.

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AMB χ1: Complete

Yesterday evening I finished up retrofitting my AMB Mini³ headphone amplifier with the AMB χ1. This is a battery management board which replaces the original charging circuitry and 9VDC NiMH battery resulting in a considerably faster charge and longer runtime. By using a Lithium-ion polymer (LiPo) battery the runtime has been extended to ~25 hours (for my high performance version) while the charging time has been reduced to ~1.5 hours. (AMB.org claims that this is a 10x improvement in charge time and a 3x improvement in run time.)

The photo above shows the rear end of the Mini³ without the end panel, showing the two LiPo packs (the silver / strapping tape pieces) the edge of the χ1 PCB (top), and the bi-color charge/fault indicator LED. Assembling this involved removing a small handful of diodes, regulators, and resistors from the Mini³’s PCB, adding a header in place of the LM7812 voltage regulator, and plugging the χ1 into that. As documented on AMB’s site building the χ1 was pretty straightforward and involved only a handful of medium-size (and easy to solder) surface mount parts. I almost wish the design was all surface mount so I wouldn’t have to deal with as much through hole, but I understand his desire to not go all-SMT in order to keep things easy to assemble.

I use this headphone almost every day at work while listening to music from my iPod, and thus far it’s sounded great. However, due to my weird patterns of not being in the office I haven’t been leaving it plugged in for long enough lately, so whenever I’ve been wanting to use it I must plug it in to use it. Hopefully this new version with a shorter charge time and longer run time will sort out that problem.

Now I want to build something else, but I’m not really sure what. I’m somewhat considering a beefy Class A amp and new monitor speakers for my desk at home, all nicely integrated with a USB DAC and tucked under my desk. I could even build the monitors themselves, but this would end up being a pretty big project and I’m not sure it’d get me enough benefit…

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Park Tool BBT-19 vs. Truvativ Howitzer Team BB

This evening when beginning assembly of a friend’s new snow bike I ran into a bit of frustration while fitting the bottom bracket. Due to the design of the Truvativ Howitzer Team BB that he chose it’s not possible to use a Park Tool BBT-19 bottom bracket tool to torque it to spec. Because the spindle has to be inserted before both cups are fitted and the tool itself isn’t very deep, the spindle keeps the tool from fitting on the cups for final torqueing. To finish the job I instead had to use a standard box-type wrench for external BBs. This did the job, but it would be nice to know that I got the torque spot on.

The stuff shown above is the initial assembly of Bob Costello’s new Carver titanium snow bike, and includes an E-Type front derailleur. This is the first time I’ve fitted one of these derailleurs, and it was a pretty easy task. However, as I was warned, the Finish Line Anti-Sieze (Ti-Prep) compound which needs to be applied to all metal fastener surface is quite a pain. It seems to be a fine metallic powder suspended in a grease, and the resulting compound is sticky, staining, and it ends up just about everywhere. Unlike grease it’s not easy to wipe off of anything but metal and solid plastic surfaces; it soaks quickly into skin and is even difficult to remove from nitrile gloves. Thankfully ProGold Lubricants’ Shop Towels do an amazing job of cleaning it up from both frames and hands.

Unfortunately, we ran into a little quirk with the acquired parts which put the build on hold for a bit, but I imagine that’ll be remedied soon.

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