[sudoroom] electronic access

Jae Kwon jkwon.work at gmail.com
Mon Nov 19 05:55:45 CET 2012 

Thanks for the writeup, Susan.

I'm doing some research online on this now. If you want to chat live, ping me on IRC at #sudoroom or find me on #sudoroom_access.

## Electric Strike
 * Can the electric strike be installed easily, or does it require cutting the door or wall?

## Internal Door Thing
 * What is the mechanism by which the vertical bars retract?
 * What existing device can automate this retraction without modifying the external panic bar mechanism?
 * How much does it cost?

## External Door Thing
 * If all fails, then we can definitely make an external device that will not obstruct the original door mechanism, by 3d printing a robotic pair of pushers. Who's interested in this project?
 * We will learn how to use Blender and/or Sketchup (whichever is better suited for modification of gear and lever systems),
 * and we will scour the internet and Thingiverse for existing works to fork from,
 * and we'll be doing some basic arduino programming as well

## Interim Solution
 * Who's going to be at SudoRoom when? We need to keep a calendar of key-keepers, who will be responsible for handing keys etc.
 * Someone needs to create this very specific Google Calendar and invite us.
 * Who has the keys now? How many are left?
 * Who is willing to volunteer to be at SudoRoom at future dates and hours? I'm willing to be there once a week until we get a long term solution. We need more volunteers.

 - Jae




On Nov 18, 2012, at 8:17 PM, Susan Werner <heinousbutch at gmail.com> wrote:

> What's generally used in these cases is what's called an electric strike:
> (see http://en.wikipedia.org/wiki/Electric_strike or 
> http://www.accesshardware.com/press/AHS%20HES%20CompleteGuide.pdf )
> 
> An electric strike is a device that is installed in the doorframe that frees
> the bolt (and thus the door) to move even when the bolt is extended. 
> 
> Another option is to replace the entire panic bar is replaced with a panic bar 
> with an internal delocking mechanism that can retract its bolt when power is 
> applied. 
> 
> What should *not* be done is any modification of the panic bar -- doing so is 
> likely to violate fire codes / life safety codes. In most building codes, there
> are strict requirements about what's allowed (and not) on doors with panic bars
> and from what I understand, modifying the panic bar is likely to cause a code
> violation. (an electric strike doesn't interfere with any of the functioning of 
> a panic bar, so those are OK)
> 
> Once you have a something that unlocks when power is applied, all you need to 
> do is interface that with a 3.3V / 5V logic output (relay + transistor with the
> right protection diodes is an easy way to go) and connect that to a computer. 
> 
> -- 
> Susan
> 
> On Nov 18 19:08, Andrew <andrew at roshambomedia.com> wrote:
>> Hi Susan,
>> 
>> Last I heard we were going to get an estimate from a door guy and then see
>> if we could do it our selves for cheaper. The problem we have is that the
>> outside facing door is one of those push bar doors. We aren't sure how to
>> approach replacing the lock with an rfid or card reader. Do you have any
>> experience with that?
>> 
>> Thanks,
>> Andrew
>> 
>> 
>> On Sun, Nov 18, 2012 at 6:41 PM, Susan Werner <heinousbutch at gmail.com>wrote:
>> 
>>> What's the status on the access things? I'm interested in helping out --
>>> I've
>>> already built very similar things (electric strike + magnetic card reader
>>> interfaced with a WR850G wireless router running openwrt (i interfaced the
>>> e-strike to the GPIO pins and the magnetic card reader to its serial port).
>>> 
>>> I also have a working beaglebone running linux (it's a small ARM board
>>> with a
>>> hellton of GPIO pins, a handful of serial ports, USB, and ethernet) and I'm
>>> willing to use it for the door access control.
>>> 
>>> --
>>> Susan
>>> 
>>> On Nov 18 16:57, Andrew <andrew at roshambomedia.com> wrote:
>>>> All updates on the access issues. I tried to get in today, but no one was
>>>> there or heard the buzzer.
>>>> 
>>>> --Andrew
>>>> 
>>>> 
>>>> On Tue, Nov 13, 2012 at 12:48 PM, Jenny Ryan <jenny at thepyre.org> wrote:
>>>> 
>>>>> There is a meta-organizational meetup at 6pm before the meeting
>>> tomorrow.
>>>>> 
>>>>> Jenny
>>>>> http://jennyryan.net
>>>>> http://thepyre.org
>>>>> http://thevirtualcampfire.org
>>>>> http://technomadic.tumblr.com
>>>>> 
>>>>> `~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`
>>>>> "Technology is the campfire around which we tell our stories."
>>>>> -Laurie Anderson
>>>>> 
>>>>> "Storytelling reveals meaning without committing the error of defining
>>> it."
>>>>> -Hannah Arendt
>>>>> 
>>>>> "To define is to kill. To suggest is to create."
>>>>> -Stéphane Mallarmé
>>>>> ~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`
>>>>> 
>>>>> 
>>>>> 
>>>>> On Tue, Nov 13, 2012 at 12:32 PM, Andrew <andrew at roshambomedia.com>
>>> wrote:
>>>>> 
>>>>>> Sounds great. I'll be there.
>>>>>> 
>>>>>> 
>>>>>> On Mon, Nov 12, 2012 at 11:06 PM, Jonoakland <
>>>>>> bayopensourcehardware at gmail.com> wrote:
>>>>>> 
>>>>>>> I'm willing and able to help with the construction side of the
>>>>>>> electronic access system I propose anyone interested in the
>>> electronic
>>>>>>> access project meets before the meeting for brainstorming 6 o'clock
>>>>>>> Wednesday and then after the meeting also...
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> sudoroom mailing list
>>>>>>> sudoroom at lists.hackerspaces.org
>>>>>>> http://lists.hackerspaces.org/mailman/listinfo/sudoroom
>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> --
>>>>>> -------
>>>>>> Andrew Lowe
>>>>>> Cell: 831-332-2507
>>>>>> http://roshambomedia.com <http://roshambomediacom>
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> _______________________________________________
>>>>>> sudoroom mailing list
>>>>>> sudoroom at lists.hackerspaces.org
>>>>>> http://lists.hackerspaces.org/mailman/listinfo/sudoroom
>>>>>> 
>>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> --
>>>> -------
>>>> Andrew Lowe
>>>> Cell: 831-332-2507
>>>> http://roshambomedia.com
>>> 
>>>> _______________________________________________
>>>> sudoroom mailing list
>>>> sudoroom at lists.hackerspaces.org
>>>> http://lists.hackerspaces.org/mailman/listinfo/sudoroom
>>> 
>>> 
>>> --
>>> 
>>> 
>>> 
>> 
>> 
>> -- 
>> -------
>> Andrew Lowe
>> Cell: 831-332-2507
>> http://roshambomedia.com
> 
> -- 
> 
> 
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> sudoroom at lists.hackerspaces.org
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