Door | Anxious Door

Howstuffworks “How Power Door Locks Work”

The stepper motor / gears option is very noisy. I am considering ditching the variable lock and going for something like this car door lock. The part (from Jaycar) is 10AUD and very nearly thin enough to fit within the door cavity.

The mechanism should have heaps of torque â€“ that would mean I could replace the spring on the deadbolt returning the authentic noise. I think its a simple motor with gearing â€“ when i supply 12V it shoots out and stops â€“ the motor still tries to run but the sound isn’t bad.

Notes with Allan.

Limit switches at the end of the deadbolt throw. Or reversible solonoid. Or solonoid that can be switched off. Osram. Sprecker and schue. Telemechanique. Pefhel and Fuchs.

Test computer controlled lock.

The gear and other parts arrived from Small Parts on Friday. I cut the gear by hand and assembled a temporary fixing. Here the Arduino runs a test cycle on the system.

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Lynch pin.

These two aluminium pieces lock the rotating gear to the main driver of the deadbolt. The L-shaped piece both spreads the split cylinder and acts as the turning arm.

Door missing.

Inside door.

“Which side of the door do you want?”

Motor mounting.

‘Daemon’ by Leinad Zeraus (2006).

pp107

No. They don’t. We believe the components are triggered not by each other, but by reading news stories. For example, one component just issued this press release…” he passed a printed page, “…only after the siege story hit the wire services. The release is digitally signed, Sobol wants us to know it was his. We already tracked down the origin of the press release; it was emailed from a poorly secured computer in a St.Louis accounting firm. The program destroyed itself after it ran, but we were able to recover it from a tape backup. It was a simple HTML reader searching hundreds of web sites for headlines about the estate siege.

pp183

Ross raised his eybows at that. “That’s to prevent him from inadvertently triggering a new Daemon event?”

“Precisely. There’s no doubt it’s reading the news. So you’d be advised to stay out of the headlines.”

[wikipedia]
[website]
[WSJ]

Daniel Suarez, aka Leinad Zeraus, in Wall Street Journal March 2009

Over-centralization and excessive interconnectivity in the pursuit of hyper-efficiency increases the fragility of the system.

Intelligent door.

Zina has turned up a book containing references to a door that reads the newspaper. Curious. More on that soon.

SCANZ is in New Plymouth again next year. Their call for proposals closes in just under a month. I am hoping to design a window that listens to weather reports and pays attention to news relating to extreme weather and climate change.

Midnight notes.

In Gibson’s Kill Switch, a computer intelligence released to the internet becomes dangerous as its freedoms are challenged, somewhat like HAL in Kubrick’s 2001. The intelligence `retreats’ into its physical chrysalis when threatened, a caravan, that is a well defended (physically) space as well as occupying a privileged terminus on the global ‘net, a T3 connection.

The door, conversely, does not roam the internet. It is psyche is bound to its physical self. It is the network that allows it sensation there by causing its anxiety. If anything, it fears the network as much as it worries about the world at large, somewhat a network agoraphobia. And its response to threat could not be more different – rather than a violent outward reaction, the door executes a quiet, inner, invisible behavior. A network twitch.