Wednesday September 13th, 2006|
Dynon EMS Alert Audio Wiring
Ok, it's been a while since I've updated the site. I've been pretty busy, then this past weekend was my birthday and my parents came into town and I got some sort of stomach virus and spent several days visiting my good friend John.
Anyway, one of the things I did while I was sick was to get in contact with DRE communications regarding alarm inputs on the intercom. DRE is actually out of business due to some sort of internal legal spat among the owners, but Garth (a former employee) is now providing support for DRE's products. Anyway, Garth was kind enough to fax me the above schematic for wiring in audio alerts into the intercom. It's pretty much exactly what I have read in other places, using various resistors to gang up audio inputs. Click here for a larger image.
So anyway, on the way home today I stopped into Radio Shack and bought a handful of various resistors. I got some 330s, 220s, 100s, etc.
Then when I got home I experimented with using various sized resistors. The above picture is *NOT* the finished product, only my quick connection to test the resistor combinations to get the best output.
I ended up using a 220 on the COM audio and a 100 on the Dynon EMS alert and it works like a champ. Now I just need to figure out how I'm going to make this look pretty. I'll probably just solder and heatshrink it and be done with it. I've thought of purchasing one of those little project boxes from Fry's, but I don't think that's going to be necessary. If I ever need anything else to the audio inputs I'll just install a full blown audio panel.