Reef Central Online Community
Marine Depot

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > Do It Yourself
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old 01/11/2008, 08:36 PM   #1
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
OT HELP: LED Light Indicator

I need to know if there is a way to hook up a small light, LED, or similar size to an Audio/Visual jack that feeds into a TV Monitor.


Here's the sitchiashun.......The TV's are hooked to cameras that are watching animal enclosures. There are numerous TV's and no way to tell WHICH TV the noises are coming from.

So I am thinking a small indicator light that hooks into the AV wire jack just prior to it entering the AV jack ! (Don't know if I'm using the correct terms here !)

Anyone....? Anyone....?


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/11/2008, 08:50 PM   #2
BeanAnimal
Registered Member
 
Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,771
Can you explain the setup a little bit more. How many cameras feeding each monitor. What kind of cabling and jacks?


BeanAnimal is offline   Reply With Quote
Old 01/11/2008, 09:26 PM   #3
Kentanner11
Registered Member
 
Kentanner11's Avatar
 
Join Date: Apr 2007
Location: Phoenix
Posts: 1,956
an easy thing to do would be to check out line level monitors from pro dj/audio websites. I would recommended www.allprosound.


__________________
- Tanner

Current Tank Info: RSM 34g
Kentanner11 is offline   Reply With Quote
Old 01/11/2008, 10:08 PM   #4
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
Ken...the link didn't connect...! But I'd like to take a look at their stuff !


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/11/2008, 10:11 PM   #5
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
The TV's are hooked to B/W cameras that feed an image through an RCA jack....into the TV. What I want is to hook a small light that will light up to indicate sound is coming from that particular camera.

Sort of like when a light goes off on the telephone of someone that is hearing impaired to let them know there is an incoming call.

I think it should be just a matter of a small adapter that plugs into the the male end of the wire just prior to it going into the RCA jack ! Does this make more sense ???


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/11/2008, 10:34 PM   #6
melev
Moved On
 
melev's Avatar
 
Join Date: Sep 2002
Location: Ft Worth, Tx
Posts: 43,217
RCA jacks carry sound and video (somehow), not power. LEDs need power. I've got no idea how you could do that.


melev is offline   Reply With Quote
Old 01/11/2008, 11:05 PM   #7
funman1
Registered Member
 
funman1's Avatar
 
Join Date: Jan 2006
Location: Roseville, CA
Posts: 4,898
I think your best bet would be to get or make a small device that lights up when audio is present,
and put "THAT" in the cage with the animals and visible to the cameras.
I'm sure there's a small project like this on hobby websites. It could prolly even be battery operated.

Just my thoughts on how I'd tackle the issue..


__________________
Professional Pyro: NO REALLY; I get PAID to blow stuff up!!

~Steve~

Current Tank Info: 12G NANO
funman1 is offline   Reply With Quote
Old 01/12/2008, 02:07 AM   #8
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
The 'animals' in question.....are Falcons. They are already in the breeding chambers and absolutely cannot be disturbed. Putting anything into the breeding chambers other than food...simply is not an option; but thank you for the suggestion !


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/12/2008, 02:19 AM   #9
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
Thanks Marc !


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/12/2008, 02:29 AM   #10
kgross
Premium Member
 
kgross's Avatar
 
Join Date: Nov 1999
Location: Nampa, ID
Posts: 5,870
It should not be to hard to do. I'm not sure what the line voltage is on your audio in, but you could use a op amp and relay to turn on the LED if the voltage was above 1/4 max, or even just little bit above the background noise level.

Get a multimeter and measure the voltage on the jack and see what your average voltage is, should be zero with no sound, make some noise and see what voltage you get with sound, and then you could use a comparator to turn on the relay when ever the voltage on the line is above the set voltage. If you know much about electronics it would not be to difficult to build.


__________________
Proud Member of the Idaho Marine Aquarium Society

America will only be the Land of the Free as long as it is the Home of the Brave.

Current Tank Info: AGA 180gallon tank, VHO/MH lighting, DSB, calcium reactor, Also a 7 Gallon Nano softy tank, and a 32 gallon cube
kgross is offline   Reply With Quote
Old 01/12/2008, 04:09 AM   #11
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
PM Sent


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Old 01/12/2008, 07:24 AM   #12
BeanAnimal
Registered Member
 
Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,771
Exactly Kim. The audio is "always" on and there is a certain noise floor for present for EACH input. You need a simple audio level meter with 2 adjustments. 1) for noise floor, or in laymens terms to set the minimum peak that will trigger the light. and 2) a sensativity adjustment to tune the circuit to fit your needs. You are basically looking at a mV scale that will rise and fall with the presense or lack of audio.

As Kim mentioned, we can do this with an OP amp or two. However it may be easier to just adapt a simple VU meter design instead of trying to come up with your own circuit.

Elliot sound products is a great resource:
http://sound.westhost.com/project60.htm
Also if you email Rod he may be able to offer some advice.

http://www.free-electronic-circuits....vel-meter.html

http://www.4qdtec.com/avu.html

On this page: LED VU METER http://ourworld.compuserve.com/homep...tm#vumeter.gif


BeanAnimal is offline   Reply With Quote
Old 01/12/2008, 07:31 AM   #13
BeanAnimal
Registered Member
 
Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,771
There are also DOZENS of sound activated switch kits out there.

Here is a spendy one that does almost exactly what you want. http://cctvproducts.stores.yahoo.net/sa1a.html

Good luck


BeanAnimal is offline   Reply With Quote
Old 01/12/2008, 06:27 PM   #14
UH_OH_5_OH
Registered Member
 
UH_OH_5_OH's Avatar
 
Join Date: Sep 2005
Location: Illinois
Posts: 1,184
BeanAnimal....thanks so very much ! I will pass this info along to my dad and see if he can pull it off !


__________________
Life is hard; it's alot harder if you're stupid !

Current Tank Info: None !
UH_OH_5_OH is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 07:07 AM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.