Lighting rants, car rants, lessons-learned, info, etc.
A chronicle of my own learning experiences delving into the field of lighting, along with observations on hybrid and conventional cars and miscellaneous other topics, and some useful tech reference stuff.

[Jump to Prius-hacking, the latest craze!]

     hobbit . at . techno-fandom . dot . org
      [read very infrequently; see below]

Lighting rants
lighting/lighting-linkfarm.html -- Many lighting-related meta-pointers, originally to support a couple of specific projects and seminars as well as being a rathole-farm
lighting/dimmer.html -- linearizing cheapo Torchiere dimmers
lighting/arisia02.txt -- review of early experience as LD at a local con
lighting/saas02.txt -- South Asian culture show, largish lighting gig at MIT, spring 2002
lighting/isr02.txt -- a song of sprinklers: failed, then rescheduled, Israeli dance gig
lighting/balty02.txt -- review of lessons learned LDing *another* con
lighting/h2k2.txt -- hogging the WholeHog at H2K2, aka the HoPE 2002 hacker con
lighting/neutrik.txt -- a small rant about Neutrik's solderless connector fiasco
lighting/side-cyc.txt -- more in the "lessons learned" department: description/analysis of lighting a large backdrop from the side, MIT, spring 2003
lighting/as-workshop.txt -- review of the Actorsingers' lighting & sound weekend workshop, early Aug 2003
... a bit of time passes ...

lighting/splash05.txt -- summary of helping teach and implement a very short-timeframe show at Splash 2005, a weekend program run by MIT's ESP organization
lighting/ab06.html -- lighting the dances at Anime Boston 2006, and general observations
lighting/dmx-signals.txt -- a brief study of RS485 signal degradation when launched from various sources into different types of cable, and some other observations [including some advice straight from Doug Fleenor himself!]
lighting/static-zing.txt -- showstopping lighting-desk problems stemming from one of those newfangled plastic-top folding tables ... important lesson here!
lighting/bigsrch.html -- a search form to do unlimited message searches on the LightNetwork forum [and others] hosted at Delphi/Prospero. Uses cookies, grrrr
*Note: Light Network moved off Prospero and is now at http://www.lightnetwork.com/
lighting/yelloband.gif -- Fun with color, aka a little roadie humor
lighting/masq-fx.txt -- Lighting effect "art fag" descriptions aimed toward costumers participating in SF/fantasy convention masquerades, or possibly any other sort of similarly theatrical production

Venue info
lighting/kresge-ckt.txt -- Kresge auditorium [MIT] hardwired-dimmers circuit map
lighting/nhs-ckt.txt -- Natick High School auditorium circuit map, mostly correct [NIY, and at this point probably never will be since NEFFA's out of there]
lighting/pph-ball.txt -- The horrendous state of the Crestron house-lighting controller at the Boston Park Plaza hotel. It desperately needs to be reconfigured

Useful lighting control stuff
lighting/m518.lib.txt -- Corrected Martin robo 518 fixture profiles for inclusion in Hog _lib.lib. Flying Pig got some of the values and modes wrong, and left out "lampoff". Includes comments on the "real life" values that the fixture understands, which will *vanish* once you load it and re-save your show
lighting/sliders.lib.txt -- Hog fixture profile to produce 27 raw DMX-valued output channels
lighting/extract.lib.txt -- Procedure to extract text-format fixture profiles from HogII _LIB.ROM
lighting/m918.lib.txt -- Improved Martin robo 918 fixture profile, providing somewhat better indication of "real life" fixture behavior
lighting/PLL2.txt -- Phase-lock macro to fake "tap sync" functionality for Hog desks
lighting/dmxval.sh -- Stupid little shell script to translate between channel % and DMX value[s]
lighting/LP15xxfix/ -- Upgrading a Leprecon 1500-series board to a GROUNDED power supply, making it significantly more stable and interference-resistant
lighting/etc-rfu/ -- A quick look inside the typical RFU for ETC boards, and diagnosis of a rather common cabling problem that plagues these units

Other theatre tech
sound/clearcom.txt -- a rundown on Clearcom and similar type intercom electrical characteristics, with pointers to other related resources [was lighting/clearcom.txt]
flipcoil/howto.html -- description of how to roll cables with no twist, using the flip-coil / over-under / fake-it / zero-wrap method [it has many names]
National Electrical Code [NFPA 70] 2001 ROP draft available in PDF format under NFPA70/

Car stuff -- hacks/mods, rants, pix, stories, etc ...

	Two electric motors and a gasoline engine, forever enmeshed in
	a deadly struggle for power, each seeking to gain the most while
	using the fewest precious resources -- their delicate dance
	constantly choreographed by a consortium of cold, calculating
	computers -- which in turn are mere slaves to a stream of arbitrary,
	capricious, and often downright stupid instructions from the loose
	nut behind the wheel.

cars/prius-linkfarm.html -- Pointers to many resources about the Prius and other hybrids, many of them pointer-nests themselves. A thousand fascinating ratholes
cars/prius-flyer.gif-- A one-page flyer that simply points to here, for randomly handing out to people who seem interested
cars/prius-mods.txt -- Full list of modifications to this particular car, many of which are described in the pages below
cars/sweet/ -- Discourse on observing a "sweet spot" engine efficiency range, yielding improved MPG at mid and higher speed ranges with proper application
cars/b-mode.html -- Lengthy explanation of what the "B" shift-select position is for, and some related quirks of the Prius hybrid system
cars/warpstealth.html -- Description of a subtle but zero-consumption high-speed "glide" mode that allows longer and more efficient coasting at speeds above 41 mph
cars/boost-hack/ -- Test-bench illustration of why regenerative braking can work at low motor RPM and still charge a high-voltage battery
cars/worktruck -- Small pictorial essay on handling large and/or heavy loads in a Prius, with particular attention to protecting the battery
cars/gps/ -- Making a relatively permanent mount for a GPS power cradle, using an easily-removable vent panel as the base
cars/nest/ -- Constructing a cozy sleeper-berth in the Prius, including a hack to run the ventilation system on very low power
cars/pwe/ -- An amusing hack to enable the power windows in a Prius without turning on the rest of the car. Also shows some details on safely removing the dashboard panels
cars/tpms/ -- A strange but functional tire-pressure warning system based on wheel speeds
cars/ect/ -- A circuit to read the raw output voltage from the engine coolant temperature thermistor, and convert it through a "linearizer" to a reasonably close mapping from degrees C to volts
cars/tachack/ -- How to install an aftermarket tachometer into a Prius, including notes on how tachometers work, how to test and calibrate them, and how to match the input circuitry to the car's signal levels if needed
cars/vvt/ -- Investigation of where variable valve timing comes into play in the Prius at highway speeds, including refutation of an earlier theory
cars/warmair/ -- Quick-n-dirty hack to redirect engine air intake from a warm air source rather than a cold one, with the intent of increased winter economy. Some test results posted within
cars/heatgames/ -- Second revision of the above warm-air intake, plus a detailed account of removing the cowl above the engine and installing a block-heater
cars/maint50k/ -- Changing the Prius HSD transaxle fluid, using the seekrit undocumented top fill plug accessed by shifting the inverter without having to drain, refill, and air-bleed its coolant. Other minor but useful preventive maintenance items discussed as well
pix/prius-ferrups.jpg -- One method of tying in a UPS to the Prius 12V system. The 450VA Best Ferrups has 66 Ah at 12V inside, way more than the Prius battery itself. The right answer, however, is to stop messing around with this feeble, inefficient 12V nonsense and build a 10kW or more inverter that feeds directly off the HV battery. See also www.priups.com
cars/naked/ -- The "Naked Prius" tech exhibit takes top honors at AltWheels 2005
cars/starthole/ -- How to fix a factory-assembly problem that can cause damage to the motor control harness, due to a starter blockoff-plate fitted backwards
cars/bp/ -- Friction-brake pressure monitor for the Prius, to show when fluid is sent to the wheel cylinders and causes kinetic energy to burn away as useless heat. Pix, circuit, discussion, etc.
In contrast to the still-vaporware Coastal product to display brake pressure, this is real and functional NOW
cars/prius-log/intro.html -- The ongoing Prius diary / blog [still and forever under construction..] Someday, when I'm not actually hacking the car, I'll get time to write more into this... for now, it details the purchase rationale and process
cars/prius-rally-hints.txt -- A guide to high-mileage Prius driving technique, specifically aimed at participants in Tour de Sol and other efficiency competitions
cars/training/ -- Online Prius/hybrid technical training course material, including details on operation, safety, diagnosis, routine maintenance/repair, and a special section on 3-phase motor basics. Slides-format so far. An ongoing project
pix/quad-rings.jpg -- Some silly photochopped ideas for painting the plastic Prius trim-rings
cars/prius-curves.gif and cars/SAE-bsfc.gif -- A collection of power/efficiency curves. Kilowatt output can be mapped very nicely to RPM, so achieving high efficiency is as easy as watching a tachometer [which, unfortunately, you have to install yourself] and trying to stay north of 1500 RPM or so whenever the engine is running
pix/holyshit.jpg -- An early result from having better instrumentation in the Prius, and paying attention to state transitions, energy demands, efficiency curves, etc. With good weather and summer gas, I can reliably reproduce 70+ mpg on back roads -- not quite up to the level of the Pittsburgh paragons who achieved 110 mpg, but still well ABOVE the EPA numbers for this car
cars/brakerust.jpg -- Visual answer to the common "brakes grabbing" Prius complaint. The fix? Throw it in neutral to disable regen during a couple of stops; you'll clean 'em right off.
cars/squirt/ -- A prototype injector monitor hacked together for the Prius, to see exactly WHEN we're consuming that precious fossil fuel
cars/imeter/ -- Installation of a prototype battery-current meter for the Prius, w/ pix, driver circuit, and discussion
cars/toyota-tis-sucks.txt -- A rant engendered by a rather horrendous "web experience" at Toyota's service-manuals subscription site
cars/ev.html -- Version 0.1 of the Prius EV-mode switch, hastily crocked in prior to its first real road trip [warning: largish pictures]
cars/Nomograph-plus-PSD.gif -- Rework of Graham Davies' original nomograph, showing the speed/torque relationships in the Prius planetary driveline and a simple schematic view of the system's construction
cars/meta1/ -- Thumbnails of the collected Prius/hybrid "slide show" as of 080418 [512 images in 8 meta-blocks, about 2.6Mb total]

Teardowns
cars/ginv/ -- In-depth mechanical and electrical analysis of the Prius inverter. Still in progress
cars/brkjob/ -- Discussion/pictorial of brake cleaning and service, with particular attention to the front caliper slide pins, and a section on how the rear drum self-adjusters work
cars/bodyecu/ -- Details on removing and disassembling the Prius "body ECU" and main connector/relay block from under the drivers-side dash
pix/prius-rheo.jpg -- Detail pic of the dash-lights "rheostat" in the Prius. It's actually a low-side PWM unit with a couple of other control leads
cars/prius-12V/ -- Details on the Prius 12 volt battery -- dimensions, type, the mounting area, voltage regulation, and quiescent drain
cars/dcty/ -- Simple removal of the "courtesy light" bulbs to avert 12V battery discharge from leaving a door ajar, with enhanced safety hints
cars/tb -- Pictorial rundown on the Prius electrically-actuated throttle body
cars/prilock -- Cleaning and maintenance of the Prius physical driver's door lock, to make it work better by removing the factory grease
cars/nest/ -- [Already listed above, but contains details on blower-fan controller]
pix/aw07/ -- Our Altwheels 2007 booth included a nice "exploded" layout of major Prius components and how they talk to each other
cars/mfd/ -- Diagnosis of a subtle but common fault in certain Prius display screen units, detailing a fairly easy repair that can save $thousands$ for out-of-warranty '04 and some '05 owners

Other car stuff
cars/mpghints.html -- Well-known but seldom followed guidelines for obtaining much higher fuel economy from most vehicles -- no gimmicks, just technique
cars/freefuel.gif and cars/freefuel.txt -- A dumbed-down version of the above covering just the very basics. Used as a handout at Altwheels 2006 and beyond, to encourage smarter driving
cars/noid/ -- Simple automotive testing widget to beep and light an LED when given power, and optionally load down the circuit at the same time. Like a noid light, but more versatile
cars/valvestem/ -- Article on defective valve stems, that began cracking away near the base after only a year in service. Entirely due to outsourced crap materials
cars/subie.html -- SOLD! 2000 Subaru Legacy L wagon, 58K miles. Reference remains for historic value and mildly amusing pictures
cars/carhacks-TR-beta.txt -- Preliminary version of a "car hacking" article that Michelle Delio was working on for the MIT Technology Review, forwarded for editing/approval
cars/carhacks-TR-final.txt -- Final release version of MIT Technology Review "car hacking" article, which despite what was thought to be a final editing pass came out rather mangled away from the supposed original. Compare and contrast! [All the articles by Delio have since been pulled over the HP / Carly Fiorina imbroglio, and a stupid, busy-work "investigation" was launched]
cars/sub-hack-1.txt -- Design and motivation of a "throttle position sensor bias" control to smooth out off-the-peg engine response
cars/sub-leak-2.txt -- Sad-but-funny saga of getting the runaround at a local dealer over a simple radiator leak
cars/pooper-give.txt -- Plea to the local net/social community to let the Pooper enjoy a dignified retirement [which eventually did happen, yay]

Miscellany
subnets.txt -- One-page quickie chart of subnet bit boundaries and allocation strategy that allows sensible room for expansion, based on RFC1219
pix/charlie/ -- A close physical look inside the MBTA's Charlie Card
pix/whr/ -- Installation of a Rheem "Marathon" water heater, with supporting details on tank construction, minor plumbing triumphs and letdowns, and ways to take the pressure off

The geeky wallpaper page has been split out to a separate index. The picture links are unchanged.

Security disclaimer: It's not my goddamn SITE, monkey-boy.

Image disclaimer: Requests for "original" or non-watermarked material are denied by policy, no exceptions. Sorry.

I normally live at avian.org, should you wish to get in touch.
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