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Show HN: A Google Calendar Door Sign

newfangled.me

21–30 of 35 posts

Re: Show HN: A Google Calendar Door Sign

#21
post #3

There might be a market for an e-paper based version of this that shows an entire day or week of schedule.

I built something similar for my desk using a raspberry pi and this 2.7 inch e-ink display: http://www.embeddedartists.com/products/displays/lcd_27_epap...

The nice thing is they have python drivers for it and it works with the gpio pins.

Re: Show HN: A Google Calendar Door Sign

#23
post #4
post #2

Sorry, spark.io is down and I'm not sure what it is: A dev-board? Why not use an RPi instead of an arduino for something like this? costs ~ 25-35 USD (depends on model) + a WiFi dongle and you can write code in Ruby/Python?!

Spark core is a low power ARM Cortex M3-based board with WiFi onboard. Very neat. I can give you several good reasons why it is more useful to do this with a Spark core (or an Arduino), but the most important to me is that learning how to program very constrained hardware platforms is useful.

I can probably do that on a bifferboard[1]. I own one that it's out of use now, but still I'd so so much more potential on a RPi.

Anyway it's good to have choices! I'd probably grab a 'spark' since I can write code in ruby, comes very handy! :-)

[1] https://sites.google.com/site/bifferboard/

Re: Show HN: A Google Calendar Door Sign

#24
Site lists the Core with embedded chip antenna at $39, which is about the cost of a $35 Trinket 6-pack (http://www.adafruit.com/products/1509). Granted those lack connectivity, but I think there's a sweet spot for something in between (i.e., with built-in BLE), maybe along the lines of these: https://www.kickstarter.com/projects/2016620887/mcthings-tin...

Either way the Spark looks nice, and the extra cost is sure to be recoverable in developer time.

Re: Show HN: A Google Calendar Door Sign

#26
post #3

There might be a market for an e-paper based version of this that shows an entire day or week of schedule.

There is. In fact there's a whole suite of products out there serving it.

At the base level you have DIY solutions (small LCD's, e-ink etc) which are loads of fun to build and can work quite nicely for some scenarios.

Another option that a lot of buildings are starting to use is iOS / Android apps along with a device in a wall mount (https://eventboard.io/ et al). Cheap (ish), easily replaceable and upgradeable hardware and apps that are quite affordable.

From here you then move into more dedicated devices which also provide some deeper integration with the environment. Traditionally this has something that has been handled by the AV world with products such as AMX's (http://amx.com/) RMS or Crestron's (http://www.crestron.com/) RoomView, however there's a bunch of other really exciting players around to like Condeco (http://www.condecosoftware.com/) which merit some consideration. Regardless of who's providing it, its at this level the tech starts to getting a little more exciting. Generally you begin to tie in with sensors (PIR, seat pressure, signal presence on laptop input etc) inside the room to provide analytics on occupancy, auto cancel meetings when there's a no show, integrate with NFC for handling access control or user auth etc. If you coming from the AV side the rest of the room can also start to interact with that booking information to (for example, parsing meeting info for video / teleconference details etc).

Re: Show HN: A Google Calendar Door Sign

#27
To power this with a battery a better solution would be to use a switching power supply. (For example a LTC3525 step up converter with two AA 1.5 V batteries.)

The linear voltage regulator basically turns 4V of the 9V block into heat. This is not really efficient.

Re: Show HN: A Google Calendar Door Sign

#28
post #24

Site lists the Core with embedded chip antenna at $39, which is about the cost of a $35 Trinket 6-pack ( http://www.adafruit.com/products/1509 ). Granted those lack connectivity, but I think there's a sweet spot for something in between (i.e., with built-in BLE), maybe along the lines of these: https://www.kickstarter.com/projects/2016620887/mcthings-tin... Either way the Spark looks nice, and the extra cost is sure…

There's actually a new Chinese board that does that cheaply. $4.50 per unit, you could probably get cheaper price if you bought them in bulk. It's the ESP8266ex. Someone used on to implement a simple minecraft server.

https://www.youtube.com/watch?v=R1zx0xV0pWw

Re: Show HN: A Google Calendar Door Sign

#29
post #27

To power this with a battery a better solution would be to use a switching power supply. (For example a LTC3525 step up converter with two AA 1.5 V batteries.) The linear voltage regulator basically turns 4V of the 9V block into heat. This is not really efficient.

Here's a step-down converter from Adafruit https://www.adafruit.com/products/1066 It's pin-compatible with the linear regulator, so you can just swap it out.

Re: Show HN: A Google Calendar Door Sign

#30

Way back before the WWW my student dorm door was plastered in misc comics and clippings - I kept cycling the clippings and being part if a high traffic corridor it got me a number if interesting people knocking to say they enjoyed it. It was I guess my first blog (maybe Pinterest) Anyway, besides that I think this really would be a fantastic solution to the "meeting room" problem. Book a room direct from the door its…

I worked for a very large software corporation for a few years, and we had exactly this. Little touchscreen LCD displays to the side of the door for all the major meeting rooms, on which you could book the room. Nobody used it for that, though. They just did it from their desk through Outlook. It was useful to see how long a room was free for if you needed it for an impromptu meeting, however ("Next booking for this…

Yeah but people who book rooms in advance from their desk are called ... Err ... organised :-)

I think the lack of rooms available to scatterbrained too busy people is a major source of negative creativity in the world

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