Thread Tools
Jul 13, 2003, 10:20 PM
stegre's Avatar

Lost Model Alarm

In another post I mentioned the Digialarm Lost Model Alarm.

I thought it might be fun to place a link to the sound of this thing. It fires off when you turn you transmitter OFF and the plane is still ON ( like when it is lost in the brush)

It causes my neighbors dogs to howl, now you too can be as popular....

Lost Model Alarm SOUND

It's nice and lound!!!

Sign up now
to remove ads between posts
Jul 13, 2003, 10:25 PM
TheTick's Avatar
That thing looks much smaller than Air Alert by Hobbico. Where can I get one? how much are they?
Jul 13, 2003, 10:31 PM
stegre's Avatar


They are on my website

and are $20. Check on the "Extras" page.

In addition, they beep as your battery becomes critical so you can land, more info is on the site.


Jul 13, 2003, 10:56 PM
Registered User
Can it support 5 cells battery (3AAA x 5, 6V)?

Jul 13, 2003, 11:00 PM
characters welcome!
Mark Wood's Avatar
From Steve's website:

Operating Voltage 2.7 V to 6.0 V

Operating Temperature -20C to 80C

Average Current Consumption - alarm inactive 4.5 mA

Average Current Consumption - alarm active 10.6 mA

Weight 6 g

Size 23 x 12 mm

Low Battery Alarm Threshold 4.0 V

NOTE: Supplying more than 6 volts to the product could cause permanent damage. Please only use 4 cell battery packs.

Pretty neat, Steve!

Jul 13, 2003, 11:05 PM
Registered User
So... are there any LMA that can input over 6V with battery checker?

Jul 13, 2003, 11:11 PM
Piscine Promulgator
surfimp's Avatar
Another nice feature of the LMA is that when you plug it in, it beeps to let you know how many volts the battery has in it. Probably not good to rely on alone, but definitely a nice feature all the same.
Jul 13, 2003, 11:14 PM
stegre's Avatar


Thanks Mark! It sure beats extra walking in a rattlesnake area like Cajon Pass!!

Sorry, no over 6v LMAs of which I am aware. If there is enough demand, we can look into having them built.

To address size, here is my P-39 for the warbird combat contest at Cajon Pass next weekend(48" span)

and here is a close-up with the LMA installed (about.5" diameter)

Hope that gives you the proper perspective ( Note: my model got dirty at the slope today... oh well, it's for combat anyway)

Is the sound coming out nice and loud from your computers?


Last edited by stegre; Jul 13, 2003 at 11:20 PM.
Jul 15, 2003, 08:17 PM
Insert custom witicism
Jeff Charlot's Avatar
I've seen that charge jack somewhere. How does it work and where can I find one?

Jul 15, 2003, 08:42 PM
stegre's Avatar

charge jack

Jeff, that charge jack is also on my site under the "tips" section. They are easy to build and reliable if you build them correctly and use the right components.

To all others, I've made it easier to hear the lost model alarm now, check it out under "extras"

Jul 15, 2003, 11:34 PM
Insert custom witicism
Jeff Charlot's Avatar
Thanks for the tips Steve.

Jul 24, 2003, 11:06 AM
Registered User
Since I put in a LMA in my Mini Blade, I fly with more confidence since I always know the status of my battery, but it can help me pin point my plane where I go down, if I can't see it. It is lot more compact than the Hobbico Flight Alert, and theirs has a separate throttle wire and connector. And the LMA only has a connector, to hook it up to the servo. Not only is it smaller, but it can take upto 6V. I like hearing the friendly beeps, and if I don't hear the right number the Mini Blade stays on the ground.

I am know going to put it in all my planes, thanks Steve for a great product.

Jul 24, 2003, 03:37 PM
Registered User
JLSalas's Avatar
I have a very similar one from (I don't remember the manufacturer) Tower. This kind of device has 3 functions:

a.- To find a lost plane
b.- To remember to turn off your receiver when your fly has finished.
c.- To make a frequency check: If you turn on your plane and don't hear any sound from it, somebody is using your frequency.

This last feature is maybe the most important of the 3.

Jul 25, 2003, 01:43 AM
stegre's Avatar


I think the best feature is the actual intended purpose( to find your lost model), but 2nd best feature is the low battery warning sound that tells you when to stop flying and land. Great safety feature and saves you $$$.

Jul 25, 2003, 10:43 AM
Registered User
JLSalas's Avatar
And the third feature cames free with the other you mentioned.

Those things are great!!!

Last edited by JLSalas; Jul 25, 2003 at 01:15 PM.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Lost Model Alarms - maybe this will work ? solentlife Radios 18 Oct 09, 2016 03:46 PM
Question The stand-alone Lost Model Alarm solentlife DIY Electronics 7 Sep 07, 2016 01:50 PM
Discussion How to setup lost model alarm on Futaba SBus Vkirbys Multirotor Drone Talk 0 Jan 31, 2016 03:37 PM
Help! need telemetry, gps, lost model alarm dhauch Multi Task F3X 10 Dec 06, 2015 09:57 PM
Help! Banggood Lost Model Alarm Setup mike_u Multirotor Drone Electronics 1 Nov 21, 2015 10:50 AM