Something more soon. I’m still catching up on sleep from traveling in the past week.
But this looks interesting — TechShop. Basically a shop where you can go and pay a day-pass fee to take classes and otherwise use industrial fabrication tools — for plastic, metal, cloth, whatever. They even have a laser-cutting machine, among their other tools.
They’re not in San Diego yet, but are apparently working on it.
So I’m a big fan of electrostatic speakers; the kind that move a large diaphragm between two high voltage stators, instead of relying on an electromagnet to move a cone back and forth. They’re usually way too pricey for me; I have a pair I was lucky enough to pick up at a store-closing sale. I think they sound better and more natural than most standard (cone) speakers.
However, this plasma speaker seems impressive. I’m curious as to how it actually sounds in real life as opposed to through a camcorder; but I like the idea that the gas is basically pushing the air around, and nothing else.
Not sure I’d actually want a plasma speaker. But the concept is cool.
The other piece of audio interestingness I’ve found recently is the Dodecasub, which apparently due to its configuration and the way in which they wire up the drivers, will give you wonderful bass in front of it up to a distance of about 15 feet, but almost nothing to the rear and outside the room you’re in. I’d have to see (hear) that to believe it, but I like the idea.
I haven’t forgotten to keep posting; the stuff I’ve been busy with has been more mundane, though.
The city approved the rough framing and electrical work a couple weeks ago; since then I’ve been having Fun With Insulation. I just finished the last of it, and while I don’t really have the energy for a full post, I just want to say that while I appreciate what it does and that it’s an incredibly efficient insulation material (we have one room that’s been insulated properly, and it doesn’t get above 80 degrees in the summer), i HATE HATE HATE installing the stuff.
I have installed 1 and a half packs of R-13 batts in the walls, 2 packs of R-30 batts in the exposed ceiling areas, and 3 packs of R-19 batts in the attic above existing insulation (which, installed in the early 80s, was only R-7, so we now have R-26 in those areas). That’s a lot of itchy fiberglas.
Here is what I have learned doing so:
* There aren’t a heck of a lot of fuzzies, though there are more when you cut the batts, but you can vacuum them up with a vacuum cleaner
* A HEPA filter, or ghetto HEPA filter, is a godsend (I’ll post about how to make one soon), but doesn’t prevent the itch
* If you even look at fiberglas funny, you will start to itch
* The paper facing on fiberglas batts is more durable than kleenex, but not by much
* (From one of our drywall guys) If you dust yourself with talcum powder or baby powder, you can look at fiberglas as funny as you want and you won’t itch as much, until you sweat the powder off
* Tyvek suits are not built for people taller than 6 feet or with a long torso.
* The Kimberly Clark tyvek suits are slightly better built than the other brand, but still rip in the crotch if a person taller than 6 feet bends over wrong.
* Either brand of tyvek suit makes you hot and sweaty
* Installing fiberglas in 90 degree weather in an attic is a good approximation of one of the levels of hell
* Showering in cold water FIRST, after dealing with fiberglas, and shampooing and soaping with the cold water will get rid of more fiberglas bits than warm water. You can switch to warm water later, after you had a good wash with cold water.
There are probably more things I’m forgetting, but the important part is that I am now done with fiberglas for a very long time. I hope. Will post more soon.
Today, I bring you a post outlining how to start the process of soundproofing a wall.
I got a lot of help and advice on this part from the good folks at Super Soundproofing here in San Diego — I’m trying to do my best to follow their direction, but I may be missing something here and there. With that said, though, here’s how I’m doing soundproofing for the first wall between two bedrooms.
On this wall, I only pulled the drywall off of one side, so it’s not getting the full double-sided soundproofing treatment that the living room to bedroom wall is getting. But for sound transmission between two bedrooms, I think this’ll do OK.
The steps to complete the wall are basically:
Seal all holes and butter any boxes with acoustical caulk
Install cotton insulation batts between studs
Lay and attach mass-loaded vinyl across the studs
Seal mass-loaded vinyl edges with acoustic caulk, and butt joints with lead tape
Lay green foam tape over each stud
Install 5/8″ sound deadening board (like GP HushRock) on wall
Seal seams with acoustical caulk
Install 5/8″ drywall, with seams running perpendicular to sound deadening board seams
Seal seams with acoustical caulk, leaving room for joint compound and taping
I used an SPL meter to measure the difference sound level after adding the various pieces, with the stereo in the next room turned to 25, playing The Puppini Sisters’ “Mister Sandman”. (Not quite pink noise, but it was something fun to listen to.)
So here are the steps I followed:
First, any wall penetration on the other side needs to be sealed with acoustical caulk that dries very flexible and rubbery (and stinky for the first week), to prevent sound transmission from air gaps. As well, any box (like the electrical boxes for power and ethernet/coax) needs to be buttered up with the stuff in order to reduce vibrations and resonances of the box.
Last week, Make posted a link to a doorbell that I saw a few years ago that got me thinking. The doorbell — an exposed electromagnetic solenoid and two wine glasses — is basically just the mechanism from a standard hardware store doorbell with wine glasses instead of the metal xylophone-style (or metallophone, for the picky) bars that make the ding dong noise.
Upon seeing that, I thought it was rather neat, and tried to come up with something I could make that would be similarly cool, and far less pricey. In the course of random shopping, we found a singing bowl with a pleasant note; and it made the perfect candidate for a doorbell mod.
So we bought that, a wall platform at Cost Plus, and a cheap electromechanical doorbell at the hardware store. I think the total cost came out to about $70. It turned into this:
It really wasn’t too hard to make; it’s not the prettiest thing in the world, but it sounds good, and is enough of a doorbell to make the dogs go nuts when they hear it.
One of the things I dabble with every now and then is electronic circuitry. I’m not nearly to the point of doing fun things with PIC boards and microcontrollers, but I do enjoy wiring up and playing with small circuits. And I’m currently somewhat fascinated with what one can do nowadays with LEDs.
I’ve ordered an MR16 light from SuperBrightLEDs — I got the 3W warm white spotlight bulb. It’s actually quite nice; I have some MR16 track light transformers I’m not using, one of which seems to work OK (no flicker or buzzing) with this bulb. The light given off is remarkably similar in color temperature to a nice halogen bulb, and reasonably bright — you’d need a few of them to come close to a 20W halogen bulb — more than I expected. It’s actually quite good as an accent/spot light. Unfortunately, it’s $35 per bulb, which isn’t cheap.
So I started investigating the parts. They use Philips’ Luxeon LED emitters from LumiLeds, which come in various configs. The ones I’m interested in are warm white (1W max — the 3W bulb uses three), and cool white (3W max). They’re like other LEDs except they’re much brighter, and use correspondingly more current (350mA instead of 20mA like normal LEDs).
I had the idea that I could put together a simple package of an LED and the support circuitry, and with any luck fit it all into a package that would go into a bi-pin Malibu light fixture, so I could purchase some reasonably inexpensive outdoor lighting, and add way more lights to my piddly 120W transformer (that’s already got 50-60W in use with 5 fixtures) for various bits of landscape lighting.
So I ordered 5 of the cool white 3W LEDs, which came out to about $27 for all of them, and have those. I ordered the star package which includes a bit of a heat sink; these things get hot.
For a support circuit, I didn’t want to use the traditional “just use a resistor” circuit to limit the current. I found the LED current controller circuit that uses a couple of resistors and a transistor to achieve the right current through the LED.
I guesstimated some of the values, and ordered five each of the following from Mouser Electronics:
Component
Price
Xicon 3W 5% Small Metal Oxide Resistors, 30 ohms
$0.39 each
Xicon 3W 5% Small Metal Oxide Resistors, 2.2 ohms
$0.39 each
Fairchild Small Signal Transistors TO-92 BC63916 NPN GP AMP
$0.14 each
Rectron Rectifiers – Bridge RS-1 1A 200V
$0.46 each
The total order comes out to about $7, not including shipping. This is why I’m posting; other than the exotic LEDs, getting components like this can be super cheap. If this works the way I think it should, I’ll have converted malibu halogen lights to LEDs for about $7.50 plus labor; not much more than the cost of the actual replacement bulbs.
If it works out, I’ll post a how-to with pictures. For now, gotta wait till the order comes through.
So, here’s a concept, though I’m sure I’m not the one who pioneered it. We went on a couple-hour road trip a few days ago, and I made a mix CD for it. But since I can’t post the songs (copyright violation), or stream it (expensive), the only way I can share it with others is to post a table with the song, artist, and album. We’ll call it an open source mix tape. And just to be snarky, it’ll be web-2.0 as well (note hyphenated web-2.0 is similar to but for trademark purposes not identical to Mr. O’Reilly’s copyright) — each album takes you DIRECTLY to the Amazon page for that album, except for one obscure Japanese album. (Full disclosure: each is an Affiliate link.)
Listening to and evaluating the mix is left as an exercise for the reader. My notes are at the end.
So obviously, I’m greatly influenced by a few things — techno lounge music and Soma FM’s Secret Agent music stream. I am amused by cheese, but do require a certain quality to the music I listen to. I can’t do techno that’s either just noise (is that “industrial?”) or only has a beat; I need something at least slightly melodic. Some of the Ursula-1000 style sampler artists do it for me. And well, I’m entertained by goofy music and energized by things approaching punk (but again, not noise punk).
Most of the music more or less flows; some of it could stand to be mixed together because a few have strange intros and such, but for the most part there aren’t any jarring transitions. (I used to help out a DJ a long time ago, who tried to teach me some of the finer points of choosing music.) Some songs are fun to listen to; Secret Agent Man is done by a Japanese band (RC Succession) that released an album of song covers where all the lyrics are literal translations into Japanese, including Summertime Blues and Queen’s Bohemian Rhapsody. Others just have a good driving beat (“Take This Job and Shove It”, “Ballroom Blitz”).
Still others are peppy covers of older good songs (various Henry Mancini/Pink Panther tunes, Seks Bomba songs, the Lemonheads’ Mrs. Robinson). And later on it goes into some good funky soul (Aretha could sing Hot Cross Buns and it’d still be good). For good measure (only 41 more shopping days) there’s a Barenaked Ladies’ Christmas song thrown in as well.
Anyway, use the links to check out song previews, buy some new albums if you’re feeling like it, and enjoy the open source mix tape.
So I’m putzing around with web logs, and one of the search terms that brings up my site is “rackmount fridge”. Nonplussed, I do the search; apparently these things do exist.
Not sure exactly what purpose these serve; I suppose we could order one and send our facilities folks into tizzies (no food or drink in the server room, don’t you know). But I thought the extent of weird was rack mounting a playstation 2– I suppose there’s always something weirder…
A while ago, after putting in sprinklers around the house, instead of getting a standard sprinkler timer at Home Depot, I bought an RS-485 digital output module, some relays, and an RS232-RS485 converter. I wrote a *really* basic perl program to control the thing, and basically set it up so that the sprinklers come on now and again via cron; the only real ‘computerized’ thing I did was to have it check weather.com to see if it said “rain” and not water if it was supposed to rain.
Due to changing landscaping (some of our plants survive, but others died) and the fact that the drip system on one of the circuits has some persistent (and annoying) leaks, and the fact that when we got the Electro-Gun termite treatment we had to disconnect it, along with everything else electronic that connected to in-wall or in-attic wires (yeah, that kind of sucked at lot) we kind of stopped using it.
We’ve been doing more potted plants lately; we have a lovely dwarf orange tree, some mint and chives, and a couple of plumerias that refuse to die no matter how much we neglect them. Lately it’s been getting a little much to remember to water everything with the hose though, so I figured it was time to fix up the sprinklers and such again.
The sprinklers are back and hooked up (had to repair a pipe break from a dog that pulled too hard on a leash wrapped around the valves), and the drip systems go to all the potted plants now. The drip system still leaks in a couple of places, but I may try some X-Treme Tape on those spots.
One thing that I’ve started wondering about, though, has been how hard it would be to set up moisture meters to figure out when to turn on the sprinklers. The same place that sells the digital output interface also sells an RS-485 analog input module (and since RS-485 can be a ‘network’, I can use the same serial port on the same computer to monitor it too). I just have to figure out how to measure the moisture in the dirt around various plants.
Turns out the wine industry (and probably other parts of the agriculture industry) have been doing this for a while. There are a coupleofplaces that sell moisture monitors; it’s basically electrical probes stuck in some kind of gypsum compound that’s connected to a probe to measure moisture content.
Upon further research, it looks like I may have to refigure this a bit. The standard “insert two nails in the ground and measure the resistance” won’t work because the salinity (and hence the resistance) of the soil may vary with the fertilizer content. “Insert two nails in gypsum (plaster of paris) and bury in the ground and measure the resistance” appears to work a bit better, but a) if you use DC instead of AC to measure you’ll get a galvanic effect and one of the probes will degrade, and b) it’s longer lasting than two nails in the ground, but still degrades after 3-5 years.
So I’ll have to use some kind of AC current to measure (maybe use the 24VAC sprinkler transformer for this plus a bunch of rectifiers), figure out how to quickly make a bunch of probes that are similar enough that I don’t have to spend a lot of time calibrating them, and then see if it’ll work at all for being a useful measure of “when to turn on the sprinklers”.
But on the plus side, it’s easier to water our plants again. Now to remember to fertilize…
I almost forgot — one more thing I wanted to do was to plug RUSC.com. “R U Sitting Comfortably” is a web site that collects recordings of old-time (30s & 40s) radio shows. When I was growing up there was an AM radio station that would replay shows like Burns and Allen, The Life of Riley, The Jack Benny Program, You Bet Your Life, and the Green Hornet. All great fun.
So recently I got a bug up my ass (not sure why) to find one of those shows, and lo and behold there are websites that collect them! RUSC seems to be one of the most complete; they have some of all of the above shows and tons which I had no idea existed or had only heard mention of. (Did you know that Allen Funt did “Candid Microphone” before he went on TV for “Candid Camera”?) They’ve also got old time baseball and football broadcasts, as well as some historical stuff (news/NPR-type broadcasts from Europe during WWII).
I’m a bit of a history buff in that it can be interesting to find out what went on during a time period and who influenced what. I love James Burke’s show “Connections” which traces a thread of connection from one seemingly unrelated item to another and another. (I don’t like going to the extent of writing papers proving a theory, though.)
So it’s also interesting to see shows like “I was a Communist for the FBI” from the middle of the Red Scare, or “Boston Blackie” and “Charlie Chan”, presenting an oh-wow-that’s-really-bad stereotyped view of certain ethnic groups. The shows even have commercials from the time; it really is something of a look into people’s lives (okay, as much as radio reflected that) and society’s views and values from sixty to seventy years ago.
Anyway — the SO and I are having fun listening to shows from old time radio, and the subscription fee is pretty tiny for what it is (we’re paying about $6/month). They have a few samplers; I heartily recommend them.
So here’s some stuff I’ve been thinking of and/or found over the past week. Okay, two things.
When it comes to evolution, right-wing nutjobs (I hesitate to call them Christians) think that it’s not real, and God created everything in a matter of days. However, when it comes to gays and lesbians, these same people think that being gay is a choice rather than a result of a person’s biology because there’s no way that that sort of behavior could have survived evolutionary selection. You can’t have it both ways, folks; time to rein in the stupid and actually think about your positions for a change. (I have nothing to link to for this; it’s just an opinion I’ve formulated while reading some of the stuff that people on the right spew.
The other cool thing I found was a group of people who a) build tesla coils, and b) the subgroup who modulate the frequency of the coils according to MIDI input. I’m linking to a forum thread because I don’t want to deep-link to anyone’s videos, but check out some of the videos there. The heavy-metal-guitar-like noises are actually the sound of the electricity coming from the tesla coil.
That’s kind of it for now. I’m sure other exciting things are happening, but my brain has melted in the heat, so I can’t come up with any now.
Okay, maybe I will turn this into a “here’s what I found on YouTube today” blog, at least for a bit. Though actually GVOD found this one first.
I’m not sure if this is supposed to be a drug reference, or what (sweet smoke?), but the music is decent, and I’m amused that everyone becomes happy and dances once they get a pie. Does it make sense? No. But it’s a fun 4-minute video.
Then there’s this, which I saw just before E3. It made the Namco booth people with their pac-man hats doubly funny.
And of course, the inimitable and always funny Pablo Francisco; we have the CD where he originally does the movie preview voice bit, but this is the first time we’ve seen it live:
Okay, I promise this won’t turn into a “here’s what I found on YouTube today” blog. But here’s what I found on YouTube today.
I found The Skeletor Show a while back; I just found it again. It’s an unemployed voice-over artist doing a really good job remixing bits of old He-Man shows. The voice-acting is certainly much better than it was in that 80s cartoon kids-can’t-tell-the-difference-between-real-acting-and-crap show.
Also, I’ve really started enjoying RocketBoom. Sort of a video blog version of Boing Boing (i.e., “here’s strange random crap people sent me”). NPR’s blog of all places introduced me to it.
Again, I’m supposed to be doing my Japanese homework. I’ve done three questions so far (out of many, many more). But meanwhile, I went through some of the photos I took at the Wild Animal Park today, and made my first ever animated gif:
These are a couple of lorikeets (colorful nectar-eating parrots; famous for making large liquidy sprays of poop — if you get one as a pet, invest in plexiglas and make sure you can hose down their living area) from the aviary where you can buy a cup of nectar to feed them. These two were doing either a mating thing or a territorial thing, and the picture sequence actually turned out to be rather interesting. (And in only 400k!)
Round three of the pictures! I just had dinner at a new Thai place we tried (see outofhousandhome for the review later), and had two Thai iced coffees. So I’m a bit uh, perky.
Today we start with the meat of the PS3. The disclaimer said that this was still an in progress design, but it looks like they’ve gotten more final in terms of the design. (more…)
Another day, another set of pictures. One more post probably later tonight or tomorrow.
My nose has been running all morning; either something bloomed during the night and is blanketing the area, or I picked up a convention cold. Plus my legs are sore. Other than that, I’m doing OK.
Today I went to E3. We ended up taking the train, then the subway — much better than driving. I took a bunch of pix, with one minor annoyance. etc. But I guess a camera makes you look like the press to most people, so I got treated pretty deferentially by almost everyone.
dreamGear, however, gets a raspberry. They had a decent looking PSP car dock that embeds in the headrest of a car seat, like people install monitors for the back seat. I thought it was neat and moved to take a picture of it, when one of the exhibitors asked if I was with the press. I said no (possibly a bad move), and she said that they didn’t allow pictures:
• From those who weren’t the press.
• Of a device that was at E3, a media show.
• That was visible from all around the booth on the show floor.
• That the exhibitors were showing off.
So, no mention from me except the raspberry. I hope the two of you reading this don’t buy their PSP car thingy.
Everyone else was great; even when a security guard called me over and I thought I was going to get bawled out, it turns out he just wanted to tell me that I could get a much better shot from where he was standing. And he was right.
Also during shooting, realizing that I had a couple of 2GB camera cards, I ended up switching from my normal mode of JPG to RAW, to see if I could fix white balance and stuff after the fact, instead of trying to switch to keep up with whatever colors were happening at the time. Not entirely sure what to do afterwards, I imported them into iphoto like usual — which can fortunately do a good job converting from RAW to jpg. I figured I’d just edit in photoshop like usual.
Not so. I got Photoshop Elements with the camera; turns out I need the full version (CS2) to use the raw plugin. I can upgrade for $500, but that won’t happen for a few months, at least.
Filed under: Actual fun! — Administrator @ 10:23 pm
We spent a day in SF today. First we took caltrain, then we took BART, and got off and walked around some.
We saw a bunch of random lovely-looking restaurants, stopped in a lovely pet-supply store called Best In Show (ha ha), grabbed coffee at two different and yummy coffee houses, and generally had fun wandering around.
Then we went to the Presidio and wandered around the new Lucasfilm buildings; we saw the statue of Yoda and marveled that the creek and lagoon both had “emergency stop” buttons (photos to be posted on Flickr soon).
After that we crossed the Golden Gate, looked at the fog covering the bay, the bridge, and such, and then drove up to Battery Spencer to look back down (and be buffetted by the wind blowing the fog up from the Pacific Ocean).
Then we had an excellent dinner of Tapas and Crepes, and retired to bed.
My SO asked me to mention that she feels poopy tonight, however, and will be double-blogging tomorrow.
I’ve been a reader (off and on) of jwz’s stuff for a while now. I regularly read the DNA Lounge backstage log and occasionally read the rants at jwz.org.
I just discovered his blog-o-links, however. A big list of fun and scary things at the same time.