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by jermg77
Sat Sep 01, 2012 4:38 pm
Forum: Automation, sensing and robotics
Topic: Burglar alarm / iPhone alerts from RPi
Replies: 16
Views: 21644

Re: Burglar alarm / iPhone alerts from RPi

I'm starting to feel like my limited understanding has brought be to a dead end. I've built this circuit: http://www.raspberrypi.org/phpBB3/viewtopic.php?t=14615 I'm replacing the reed switch with a 13.8vdc trigger from the alarm panel. Pyrowl is working fine with test messages, but using this test ...
by jermg77
Sat Aug 18, 2012 5:30 pm
Forum: Automation, sensing and robotics
Topic: Burglar alarm / iPhone alerts from RPi
Replies: 16
Views: 21644

Re: Burglar alarm / iPhone alerts from RPi

Hi, This is a great idea. I already use Prowl to alert me of things that happen at home, it would be cool to enable a RPi to do the same. I am having some trouble getting the example working - the lack of indents is one issue. However the error I am getting suggests I am missing some part of the in...
by jermg77
Sat Aug 18, 2012 4:44 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Help interfacing 13.8Vdc to GPIO
Replies: 6
Views: 1606

Re: Help interfacing 13.8Vdc to GPIO

ok, so I've built this (to the best of my ability). I used the transistor version solely because Radio Shack does not stock any optoisolators (you should have seen the blank stare on the employee's face when I asked.. sigh..) So, having built this, and again being very new to it, I figured prior to ...
by jermg77
Wed Aug 15, 2012 8:30 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Help interfacing 13.8Vdc to GPIO
Replies: 6
Views: 1606

Re: Help interfacing 13.8Vdc to GPIO

Excellent.. While I'm asking elementary questions, can you steer me towards proper parts? The opto isolator is easy enough to find, but the resistors seem a bit hard for me to sort through..

I appreciate the help!

-jerm!
by jermg77
Wed Aug 15, 2012 5:37 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Help interfacing 13.8Vdc to GPIO
Replies: 6
Views: 1606

Help interfacing 13.8Vdc to GPIO

So, I'm nvery new at this stuff and am trying to get a grip on some basics. I'm looking to use my Rpi for sense a 13.8vdc source. Anyone care to point me in the proper direction? Does this look like the way to go? http://arduino.cc/playground/uploads/Learning/Level_shifting_4_arduino.pdf Thanks! -je...
by jermg77
Tue Aug 14, 2012 4:22 pm
Forum: Automation, sensing and robotics
Topic: Burglar alarm / iPhone alerts from RPi
Replies: 16
Views: 21644

Re: Burglar alarm / iPhone alerts from RPi

Hello! I'm new to all of this... (and I mean ALL) So, I will be brief... I'm looking to replicate this project, with one difference... In place of using a switch on a door, my goal is to have the burglar alarm siren be my input device (at least the siren outputs on the alarm mainboard.) Here is wher...

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