04/22/08

update on the great ypsi bike-powered movie thing

OK, it was super short notice, but some of us met last Friday evening to discuss the bike-powered movie project. About 8 people attended. Following are my rough notes on what was discussed. If it’s not clear from reading through them, the consensus of those present was that it’s not only a project worth doing, but one that might actually work.

• We need a name for this thing, a logo, and a website where we can keep people posted on our progress. Maybe something with “people powered” or “off-grid” in the name. How about “Ypsi Off-Grid,” or the “Ypsi Off-Grid Film Series"? And maybe, if we don’t accept money from the DTE Foundation, we can even use Brackache’s line about telling the power companies to “kiss our gyrating, well-toned asses” in our marketing materials. That, I think, would look damn good on a poster. (Will someone remind me to delete this if we decide to go to DTE for funding?)

• Kurt A, who does the great Prospect Park website, was the first to bring up light pollution. He suggested that we choose a moonless night. And, at that point, local solar guru Dave Strenski reminded everyone that new lights had just been installed in the park. He wondered if they might be shut off somehow. My suggestion, that we smash them, was rightly shouted down. Dave seemed to think that we might be able to get black hood over them, if there weren’t a way to get them shut off. I have to think there’s a central way to shut them off, but, if not, I suppose the sight of us all marching in wearing black cloaks, which are then ceremoniously hoisted up to cover the lights, could be pretty cool.

• It was the feeling of those attending that we could do it with ten bikes, assuming we had sufficient battery storage so that we could begin charging prior to the screening.

•A decision was made, I believe, to divide our ten people-powered charging stations into two general types. Five would be fully built-out, using salvaged bike frames welded permanently to bases. A few of these could even use office chairs instead of bike seats. I haven’t spoken with him yet, but word is that we have a welder willing to donate his time. In addition to these five permanent but portable power stations, we’ll also have five “ride-up” stations where people can pull their own bikes in, hook up to a generator, and start pumping out power. It’s undecided exactly how this will be done. Either the back tires can run on conveyer belt rollers that power a generator, or the back wheel can be removed and a chain run directly to a generator. (In that scenario, we’d have to also figure out a way to keep tension in the chain.)

• Bikes. I’ve got one to contribute. Andy Claydon from Flying Bomb Records also has one to contribute. I suspect we can find a few more here in the MM.com audience. If not, we can go to the police department, or perhaps Detroit’s Back Alley Bikes. It shouldn’t be that hard to find bikes to scrap, though. [Speaking of local bikes, does anyone know the deal behind Bikes In Town moving from Ypsi to Canton? Is there any chance that we might get another shop, or a bike co-op to fill the void?]

• I’m probably going to get the job of marketing and fundraising. Right now, I don’t have a plan. I may look for some grants, if we can do it without being an official 501c3 non-profit. And, if not, I may look for an established non-profit with a complimentary agenda, to join forces with. And, outside of grants, I’m sure there are local businesses and individuals who might want to support something like this. (A few of them have already contacted me.) I’m also thinking that maybe, if we’ve got a cool logo, we might be able to sell t-shirts at the July 19 Shadow Art Fair to raise some money.

• We kicked around various alternatives for handling sound. One of the ideas was that we broadcast the signal somehow and ask people to come with their transistor radios and boom boxes. Andy is taking the lead one this. I just talked with him, and he thinks that it’s doable. We have some concerns about how it might sound with dozens of radios playing, but we’ll at least give it a shot. If we have to, we’ll go with some big PA (public address system), but we really like the idea of having a distributed system with a lot of people contributing. I don’t know if we’d make it a rule, but we discussed that it might be cool if everyone came prepared to help in some way, whether it be by bringing a bike, a radio, or a huge bag of popcorn.

• Where to put the screen… It was pointed out that we could probably get the best image by shooting against the back of the building at the entrance of the park, but we all agreed that it would be a hell of a lot cooler to have the screen set up right at the water’s edge, so that we’d be looking toward the river. We just need to figure out how big of a screen we can use, what material would give us the best image, and how to hang it. (A sheet hoisted up between two trees might work, but the angle and movement of the screen could detract from the experience.)

• The first time out, we’ll keep things relatively short and simple. We’ll just show Night of the Hunter. If we pull it off, we’ll get more ambitious next time, perhaps starting with a cartoon and including trailers for upcoming films. (If we get this first one done early enough, we might even be able to have a few screenings this year before cold weather comes.)

• We need storage space. I have to think that there’s a landlord out there somewhere in Ypsi with a piece of industrial property sitting vacant. Or, what about the old 555 building that the City owns on Water Street? I wonder if they’d allow us to store things there. One would think they’d be anxious to put the Water Street property to good use, but you never know.

• It’s still not certain what positions we’ll all end up taking, but, assuming he’s into the idea, I think that all of us, at least all of us at the first meeting, would very much like to have Dave Strenski in charge of the engineering. He seems to have a really good handle on it. A lot of people there had a much better understanding than I did concerning the science of it, but I think everyone would agree that Dave knew the most. And, as he built the solar system at the Co-op, he’s got real hands-on experience with batteries and DC to AC inverters. (In other words, I think he’s the best chance we’ve got not to be electrocuted.)

• I don’t enjoy fundraising, but, at the very least, we’re going to need to bring in several hundred dollars for the generators. There’s a chance that we might be able to get away with not having a DC to AC inverter (if we find a projector, VCR and sound system that run on DC), but it’s unlikely. There’s also the possibility that we might be able to borrow an inverter, but, from what I’m told, they tend to be big, expensive things. Dave has priced them out recently and says that they could be as much as $1 for every watt they handle. That means an inverter that would handle 1,500 watts might cost about $1,500. Hopefully, someone will cut us a break though.

• As for the generators, we’d need to have one to attach to each bike. (We did discuss the possibility of using car alternators, but I believe the consensus was that generators would be a better solution.) I’m not sure where we got the number, but we seem to think they would cost about $150 each. If we’re running 10 bikes, that’s another $1,500. The cool thing is, however, once we bought them, we’d have them forever. As long as they kept working and we had the energy to pedal, we’d always be able to make power for community events. (We did also discuss scenarios where several bikes would sit side-by-side, driving one generator. The problem there, however, if I’m remembering correctly, is that everyone would have to be pedaling at the same speed.)

• I thought briefly about applying for a Shadow Art Fair grant, but, after talking it over with some friends, I’m thinking that I won’t. Even though I think it’s exactly the kind of thing we as an organization would love to support, I don’t want for there to be an appearance of impropriety. (I was planning to excuse myself from judging, but, even then, if I got some of the grant money, people could suggest that I used my influence, etc. So, I dropped the idea.)

• As far as next steps, we need to build one each of the power stations - one complete system and one “ride-up” unit - so that we can measure how many watts are output. (I didn’t clear it with the family yet, but I can probably find a way to front the money for the first two generators.) And, while the production team takes care of that, I need to locate a projector, determine how many watts it requires, and how large of a focused image it can produce. I also need to start looking for grant money. And, as I mentioned at the outset, we need to get going with a name, logo and website. We also need to pick a date for the first event, get the City’s approval, and setup a Paypal account so that we can accept contributions online… Oh, and we need to secure a place to store the bikes temporarily, and a line up a few folks with trucks who wouldn’t might hauling them out on event days… And that’s just what we have to do first. There’s a lot more that needs to be done if we want to actually pull it off.

OK, I hope that made some sense. The bottom line is that it was a damned good meeting. Jim from Café Luwak was there and he said it was like being a part of the Apollo 13 mission, which I think is an awesome analogy. Sitting around the table, trying to figure out how we were going to make this thing fly, it really did feel like we were out there somewhere, all by ourselves, completely cut off from society. It was really cool, and I’d like to thank all of the folks who came out for the first meeting. As for the rest of you, I’m sure there will be opportunities to be involved in the future. Just let me know if you’d like to join the team and I’ll add your name to the email group.

Comments, Pingbacks:

Comment from: Brackache [Visitor] Email
If that $150 ballpark figure is correctish, point me in the direction of where to purchase one of them bike generators and I'll buy one and let y'all use it. Also, I have a tandem bike we don't use, say maybe if the generator is really rusty and requires the power of two people to crank it together dorkily.
PermalinkPermalink 04/22/08 @ 19:26
Comment from: mark [Member] Email
The $150 number may be way off base. We've got to look into it. I'll keep you posted though.

The first thing we have to do is figure out how much wattage we'll require. That means we need to identify the VCR, projector, and sound system we'll be using and get their specs. Once we have that, we'll know exactly what we need. If we're right about ten bikes, maybe we could get a volume discount somewhere.

And thanks for the offer of the tandem. That's very cool.
PermalinkPermalink 04/22/08 @ 20:26
Comment from: melissa [Visitor] Email · http://www.severedunicornheadsuperstore.com
- What if the bottom of the screen (if it was light fabric like a sheet) had weights stitched into it? I'm pretty sure something like this could be picked up at Joann Fabrics (some kind of weighted piping). Or it gets made so that the two sides of the fabric screen have casings/openings for inserting poles that then go into the ground. For fabric, there's also heavier light-colored fabric for home decorating stuff that would work that wouldn't flap around as much and also wouldn't tear like a vinyl-type material might.

- What about some kind of play on "drive-in movie" for a name?
Or calling them "dirty movies" cuz they're being powered all down and dirty style.

- I'm going to be the owner of a used mini van beginning next week, so if you need stuff hauled around, let me know.

- If you end up needing bikes really badly, get in touch with Back Alley Bikes-- last time I was there they had bikes coming out of their eyeballs and were dying to get rid of them.

Are you shooting to have this running this summer? What's your timeline?



PermalinkPermalink 04/22/08 @ 20:39
Comment from: mark [Member] Email
Yup. We could try weights at the bottom. Or, we could stake the bottom into the ground somehow. I still think that it would be almost impossible to keep the wind from rippling though it. And, I suspect it would be almost impossible to get it completely straight to begin with. Personally, I'd be fine with it. Some folks, however, might find it too distracting.

There's also the question of what to make the screen out of. I'd been thinking about a plain white sheet. I'm told, however, that we might be able to get real screens from Property Disposition at UM. They're apparently made with silver stuff that makes them more reflective. If we can get ahold of one, I figure that we should try it.

I'll add "Dirty Movies" to the list of titles being considered. I like it, especially given our City's reputation for smut, but I think it could work against us PR-wise. We should still consider it, though.

Cool on the mini van. Congratulations on that.

And, yeah, assuming we can all get our shit together, it would be great to at least get a test screening in this year. If we bust our asses, I bet we might even be able to get in a few.

PermalinkPermalink 04/22/08 @ 20:49
Comment from: trusty getto [Visitor] Email · http://www.trustygetto.com
I'm so out of shape, and I got so exhausted just reading that, I had to take a break ;)

Now that I'm all rested, I'll check into the lighting situation and see if the lights can be turned off.

PermalinkPermalink 04/22/08 @ 20:49
Comment from: John on Forest [Visitor] Email · http://home.comcast.net/~marraeshuler
Mark, did you miss my remark here
where I put this link to my offer of a DC-AC inverter?

I wasn't at the meeting, so I don't understand why the idea of using an automobile alternator was rejected. At $150/generator I'd think the alternator route would be a lot less expensive.

My DC-AC inverter was the largest available at Wal-mart. It was about $80 for 750 watts, quite a bit less than $1500 that you put in your post for only twice the power. The key would be to find a projector that runs on less than 750 watts.

I don't know why the radio idea wouldn't work, re: "We have some concerns about how it might sound with dozens of radios playing". Drive-in movie theaters use that technology all the time with great success.

Also, Marlena offered her talent as a pre-event. She is quite serious about this offer.
PermalinkPermalink 04/22/08 @ 20:57
Comment from: Deadhand Dan [Visitor] Email
I really want this to work for you guys, even though I don't live in Ypsi - I'll even paypal you some money, but I'm wondering about the noise of 10 generators - will that interfere with people hearing the film?
PermalinkPermalink 04/22/08 @ 20:58
Comment from: John on Forest [Visitor] Email · http://home.comcast.net/~marraeshuler
I could tow my sailboat down to the park, put up the mast, and hoist the sail if you want to use that as a movie screen.

OK, bad idea. Still a wind problem and besides the sail is not flat.
PermalinkPermalink 04/22/08 @ 21:04
Comment from: amanda [Visitor] Email
we so very much need electricity at the downtown ypsi farmers market, and i wanted to do the bike-powered generator thing a few years ago to get it, though never made it happen... if we could make some of these bikes to use at the market (which i think would be a huge hit with visitors, and a *great* community physical activity promoter-- and then also of course at the film fest, i could probably find funding for them... i've long dreamed of having one of these things we could take to garden sites for workdays-- just to have enough electricity to charge cordless drill batteries and maybe a radio...
PermalinkPermalink 04/22/08 @ 22:26
Comment from: mark [Member] Email
John, I did see your earlier note about the inverter, and I believe I left a comment in reply in an earlier thread. My understanding is that we'll need more than 750 watts, but I'll let you know after we've identified all of the items we'll be using and what their power needs are. And I'm not sure about price. Jim looked into inverters today too, and, like you, found that they were pretty inexpensive, at least those in the 750 watt range. I haven't had a chance to talk with Dave yet, but I will. Maybe once they go over 750, there's a big difference in the kind of technology that's required.

And I appreciate Marlena's offer to do story telling prior to the film. Given the fact that the first film, Night of the Hunter, isn't too kid-friendly, however, I was thinking that we probably shouldn't encourage kids to come. If it works, though, and we have other films, then it's absolutely something we'd consider.

And thanks for checking on the lights, Trusty. I appreciate it.

And, Dan, you're right - it could be noisy. We'll just have to wait and see. Hopefully we can put the bikes far enough away that all the spinning generators won't interfere too much.

PermalinkPermalink 04/22/08 @ 22:32
Comment from: mark [Member] Email
And my original thought, John, was to put the screen on the other side of the river, and project across the water. I think, given the power of the projectors that we're talking about, though, it's just too far. I think it would be cool though.
PermalinkPermalink 04/22/08 @ 22:34
Comment from: mark [Member] Email
Or, here's another idea. We could drop the screen from the bridge. Everyone would have to watch it at kind of an angle, but it might be cool.
PermalinkPermalink 04/22/08 @ 22:35
Comment from: mark [Member] Email
Actually, Amanda, I wanted to talk with you about it. I think there are grants we could go after, but, as we're not a 501c3, we can't. I was thinking that maybe we could join forces on this and run it, or at least some component of it, as a Growing Hope project. Anyway, it's something to think about. Regardless, I think that's a great idea about providing energy at the Farmer's Market. Our hope was always that they'd be put to good use when not being used by us, and this would be perfect. I love it... The only problem would be getting them too and from the market each week... But maybe there's space around there that someone would donate. If it was only a few blocks, we could put them on wheels and roll them over.
PermalinkPermalink 04/22/08 @ 22:42
Comment from: amanda [Visitor] Email
yeah let's talk more. i don't know about ten, but we could store a few at the GH Center...
PermalinkPermalink 04/22/08 @ 23:01
Comment from: Andy C [Visitor] Email
A few things. The radios should work with the FM transmitter since I saw a lot of places advertising them for Drive-in theaters. We can cover 150 feet for pretty cheap right off the shelf. I have a electronics geek friend, here in Ypsi, who is looking into the cost of home building a larger one. We should still have some external sound back by the bikes but a stereo will do, no need for a PA. Lots of small radios will keep the noise down too.

In the summer it doesn't get dark until 10pm so kids staying up till midnight might not be the best idea. Can we even be in the park that long? Not to mention an hour break down and the mosquitoes!

I have large sheets of white material we can use for a screen and to test for reflectiveness if needed. Could be spray them with a gloss paint to increase the light bounce? This is only a back up if the screens fall through.

As for storage, maybe can split them up amongst us. I'd be happy to store one in by basement.

I'm sure Ypsi Bike or Tree Fork Bikes would be happy to help out. Word on the street is there's a lot of piping in the basement of Ypsi Bike on Michigan Ave. Seems someone was trying to make custom bike frames down there. Well it was there when Bikes in Town owned the spot less than a month ago.
PermalinkPermalink 04/23/08 @ 00:25
Comment from: meximese [Visitor] Email
I love the idea. It's great.

A couple of things: You're going to want at least a 2000 ANSI lumen projector, to cut through ambient light and whatnot. You could get away with less, but then keep things dark.

Apparently you can get by using a 600 watt inverter to power a 2500 ANSI lumen projector. And these things run around $80 - $100 dollars. So you might be over estimating the expense.

Powering a stereo, vcr and other items shouldn't take much. But you will want a decent receiver to make things audible. Ambient noise adds up. Also, the FM transmitter for audio can work, but only if there isn't a nearby, dominant radio station to interfere. In ann arbor, WCBN proved too powerful for this idea.

Finally, and I may be wrong here, but by registering with the city, getting 501c3 status, etc, it seems you're going to need "permission" to screen movies outside the public domain. And that is costly.

Just something to think about. I used to screen movies behind Michigan Theater in 04-05. But I stole my electricity from the
university...

PermalinkPermalink 04/23/08 @ 06:27
Comment from: Adam Davis [Visitor] Email · http://www.driveslowly.org
This is a very cool idea! Please add me to your mailing list - adavis,ubasics,com.

Some thoughts and research:

Inverters (Sam's Club):
3,000W - $338
1,200W - $114
800W - $ 57

Projector (Sam's Club):
Sharp XR30X
2300 lumens
1024x768 DLP
283W consumption
$675

Most projecters will consume between 200 and 300W max. DLP projectors are more efficient - they put out more light per input watt than LCD projectors.

Screen:
Sheets are cheap and available, but a 100" projection screen is only $70 (again, Sam's Club). If we wanted to expand later we could buy 4 and attach them to each other for under $300, giving a 200" screen, although that wouldn't be perfect, it would probably be brighter than a sheet.

Coating a sheet could be troublesome without the right paint - it has to be flexible, adhere to the sheet, but once dry not adhere to anything else even in hot weather. Once coated it would always have to be rolled to avoid creases (same as a real screen).

Other than ugly/visible seams, cheap 1/8" fiberboard is only $10 for 4' x 8' so for $40 we could have a 214" screen (17'). Lots more storage, but much less susceptible to wind, etc. Would still require a good coating of flat, reflective paint.

Stretching the screen:
Replacement tent poles (flexible fiberglass sections with shock cord through the middle) are inexpensive:
http://www.tents-tents-now.com/tents_pole_kits.htm
If we sewed a loop or roll along each edge of the sheet in a bowed pattern, and had angled corner pieces to put the poles into we could have a rectangle or square with bowed edges to keep the sheet/screen taut. It would take a bit of fiddling, and probably be iterative until we got the technique down, but it would take up very little space in storage, and would result in a ripple-free surface.

Alternately, set it up like a volleyball net: two poles with ropes along the top and bottom, and guy wires pulling the poles away from the screen.

DVD player:
A nice DVD player consumes about 40W. A portable DVD player will run off 12V, and can consume less, especially if the screen is turned off. $40-$150.

FM transmitter:
Even with a powerful station nearby, a good FM transmitter will do very well. Ramsey Electronics has a few synthesized FM transmitter kits for $140-$200. I do like the idea of using individual radios - that way we can optimize sound output individually, rather than having people who think it's too quiet, people who think it's too loud, and possibly annoying others that are in the area but not interested. I'm willing and able to build and test a kit if we want to avoid the expense of purchasing it assembled. These run off 12V, and consume maximum 8W.

Power consumption:
Projector <300W
DVD/VCR <100W
FM <10W

The entire system could be lower than 500W, so an inexpensive inverter should be fine. In fact, given that these are max values (which usually include a significant operating margin) we should be able to run them off a $25 400W inverter and still have a 25% margin. But if flexibility and over-engineering is required (or you want to run a PA) then an 800W would be more than enough.

With 10 bicycles, each cyclist could be cycling very lazily to provide the needed 500W. I'd recommend at least one small battery so we don't have power dips when people slow down cycling for intense parts of the movie, and it will create a load that will help avoid over-voltages when they all speed up during other intense parts of the movie. Two trained cyclists, going fast but not sprinting (aerobic) could maintain 400-500W for 2 hours, so there's a good upper limit if you need to know what people are capable of.

A typical small car battery is 45AH, which is about 500W for one hour. With a few batteries and 10 powerful cyclists you could cycle/sprint for 20 minutes and get enough energy to run the show for two hours with no cycling.

Would be neat to have an energy meter display in front of the cyclists (individually and collectively) that shows exactly how much power is coming from them vs the battery and each other - see if they can work together to match the load exactly, or 'work ahead' and sprint for a bit, then rest for a bit, etc. Would add an additional game to the fun.

Note that I'm not suggesting you use the components above, I'm merely giving examples of pricing and power consumption to use as ballpark figures.

I hope this is helpful, please keep me updated.

-Adam
PermalinkPermalink 04/23/08 @ 08:54
Comment from: mar on Forest [Visitor] Email · http://home.comcast.net/~marraeshuler
Thank you, Mark, for addressing the kids' program offer. I wasn't thinking of a particular film, though, and of course, I agree with you . However, If experience serves, I bet some parents will cart kids along to even the bloodiest, zombie-filled movies anyway. Seriously-we've all seen it happen.

I wanted to help, and it's the only thing I had to offer. Got no money, no engineering skills, my bike is too stupid to use for anything.

I can cartwheel for money at a future fundraising event for the freight-house, though. Some people might pay money to see a woman of my years cartwheel and end in the splits for a grand finish. (all proceeds to the freight house, of course. except for tips.)


still thinking about a name? is "sweat equity movies" useful? "Biker films"? "Pedal powered park movies"?

about noise and hearing the film-
some movies are excellent without sound, I think. Provide a mood and a tone to a get together. Really old movies are fun that way. I do it in one room of our house when we have our annual halloween party.
PermalinkPermalink 04/23/08 @ 09:04
Comment from: Jay R. Wren [Visitor] Email · http://jrwren.wrenfam.com/blog/
This is awesome. I've wanted to play with a bike and generator to generator power for close to a year now. I'd like to try it just for charging my AA batteries and cell phone and things. I've wondered how long and how much it would take.

I'm wondering what the typical efficiency of a store bought AC/DC inverter is. I've always seen them throw off a lot of heat, which makes me think that one could be built to be far more efficient. Maybe Dave knows?

If you are interested in presenting your progress or a report after the fact, the Ann Arbor Computing Society would love to hear about this.
PermalinkPermalink 04/23/08 @ 09:29
Comment from: ypsilanti cycle llc [Member] Email
Ypsilanti Cycle LLC is the new bicycle shop downtown Ypsilanti at 116-118 W.Michigan ave, since March 1st, 2008.
www.ypsilanticycle.com
734-482-7881 NEW NUMBER.
We have a full e commerce website for all your cycling needs if you can't stop into the shop right downtown Ypsilanti.
We also have an ebay section.Click on the Ebay link on the Website and it will take you to our special auctioning ebay store center; where we offer deals on closeout items and other great specials.

Ralph Ellis and Paul Neff have teamed up to bring a top notch bike shop to Downtown Ypsilanti again.
We sell new bicycles all levels, and repair all makes and models. We also sell used bikes.
Schwinn, GT, SE, FUJI, FELT, Diamondback bicycle lines and more being added are in stock and selling on a daily basis..

The past month has been great as several lines of bikes have had to be reordered because of such great support from Ypsilanti customers. Thank you very much.
Ralph and Paul appreciate the enormous support from the community, the day we opened up.

Ralph Ellis owned Ypsilanti Cycle, and the buildings since 1982 and had the shop through 1997.
Bicycles in Town owner moved to Canton in Feb 2008.
He is gone from Ypsilanti.
YPSILANTI CYCLE LLC. is here to stay and support the community in anyway possible.

Ralph Ellis has been building frames since, 1982 and has a full frame building technology center downstairs at the shop.
He can build any steel frame, fork set up you want.

Please feel free to stop in anytime at Ypsilanti Cycle LLC
www.ypsilanticycle.com
PermalinkPermalink 04/23/08 @ 10:48
Comment from: Andy C [Visitor] Email
Even most of the large auditorium projectors, 4000-6000 Lumens, do not exceed 500W.

VHS was decided on because it can start right back up at the same place in the film if power was lost.

Adam-thanks for the Ramsey Electronics link.

My apologies to Ypsilanti Cycle for calling them Ypsi Bike, it was late.
PermalinkPermalink 04/23/08 @ 11:39
Comment from: Adam Davis [Visitor] Email · http://www.ubasics.com
$25 used VHS player - runs on 12V or 110V: http://losangeles.craigslist.org/sfv/ele/650890273.html

Also might look at junkyards, they may have an older minivan with a built in VHS player. I've been happy with http://aachenauto.com for parts for my car.

The point about VHS tape restarting where it was stopped is very good. Alternately use a portable DVD player with its own battery (keeps playing if power stops) or a portable media player (zune, ipod, etc) both of which use significantly less power than VHS or DVD, but may require some conversion time.

-Adam
PermalinkPermalink 04/23/08 @ 14:56
Comment from: ypsilanti cycle llc [Member] Email
No problem,
we just want to make sure, people know we are here right downtown.
:-)
PermalinkPermalink 04/23/08 @ 19:07
Comment from: Jim Karnopp [Visitor] Email · http://www.cafeluwak.com
I am not sure if it will work out in time, but I have been looking at the model projector mentioned above at Sam's for my cafe. I thought it would be a nice thing to have for meetings and in the winter we could do a student film night or a you tube night or something like that. If I come up with the finances in time, I would be more than willing to share it for this project.
PermalinkPermalink 04/23/08 @ 21:13
Comment from: John on Forest [Visitor] Email · http://home.comcast.net/~marraeshuler
mark, I could launch my sailboat into the river and we could project onto the sails there as I navigate up and down the river.

Wait, I already said that was a bad idea.

Has anyone heard of those inflatable movie screens? We'd probably need 3000 watts just to run the fan for one of those though. That's a lot of bikers.
PermalinkPermalink 04/23/08 @ 23:25
Comment from: Timothy [Visitor] Email · http://twofellswoops.com
At the Bluish Barn, we used a wide white roller shade and flipped it sideways to fit an even wider aspect ratio. Those things are a pretty strong kind of vinyl I think and can be reinforced at points where they tie to supports. Then they can be simply untied and rolled up for storage.

Most projectors now are bright enough to make a projection that's easily viewable even with some light pollution. I wouldn't worry too much about that, unless you plan to have a gigantic screen.

Give me a month and I can get some bikes from my job. Also a VHS player, no problem.

I definitely think getting the radio transmitter thing to work would be awesome. Like meximese said, they tried this once at Twitch but had too much interference from WCBN at all frequencies for some reason.

From the sound of it, I think a logical thing to do is to actually go to the site and figure out the exact location before more decisions get made. How big does the screen need to be? Where/how will people sit? What would the traffic flow in/out be like? Could people come and go as they please? Would noise be an issue for any neighbors? These are just some of the questions that a good site scouting should answer.

Another thought: what about self-powering electric exercise bikes? Does anyone know if these could be somehow rewired to draw power?
PermalinkPermalink 04/24/08 @ 09:24
Comment from: eric [Visitor]
I don't know if it would save anything, but most of the power you'd be using would be converted to DC for the electronics anyway, so why not skip the whole inverter part and just open up the devices, find out what their internal DC requirements are, bypass their AC power supplies and connect regulated DC directly to their internal DC power inputs?

As for screens, one idea would be to construct a basic wooden frame over which to stretch a large sheet. You can make the frame using loose-pin hinges to hold it together, and you could gesso the sheet to make it more rigid and reflective. It could then be stored by simply removing the pins and folding it up, and would be more resistant to wrinkling than if it were painted.

A source for generators could be old motors from vacuum cleaners, fans, or washers/dryers.
PermalinkPermalink 04/24/08 @ 10:18
Comment from: frenchfries [Member] Email
There are plans on the web for adapting a bike trainer to fit a generator instead of the usual magnetic or fluid resistance thing. Here is a link

http://www.scienceshareware.com/build-your-own-generator-bike-trainer-stand.htm

Also, I put a link to this post on the Bike Ypsi forum. It would be sick if this could be the evening activity following the May 4 spring ride and festival--but probably that's not likely.

Anyway, I should be able to kick in about 100 W if I can put together one of these generators. Too bad it means less beer.
PermalinkPermalink 04/24/08 @ 11:28
Comment from: Old Man Gordon [Visitor] Email · http://www.gordonsfiveanddime.com
How about "Cycle Cinema"? or "Reels on Wheels"?
The Cs could be artistically joined to look like both a bicyle and film reels.
PermalinkPermalink 04/24/08 @ 15:05
Comment from: Edward Vielmetti [Visitor] Email · http://vielmetti.typepad.com
East Quad Bicycle Coop did a bike fixup recently - details at

http://cfa2.blogspot.com/2008/04/photos-of-east-quad-bike-coop-fixup.html

as you think of building bike generators this might be a good approach to parts (or people too).
PermalinkPermalink 04/24/08 @ 23:22

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