Play LMA Sound!

THIS WILL HAPPEN TO YOU!!

One day out flying;

The wind will stop blowing and you will land down the hill
You will have a mid air and crash down the hill - or in long grass like Floyd did in Panama

You will misjudge your landing and end up in the trees behind the slope
If you have a lost model alarm fitted you will be able to walk straight to you model and retrieve it. If you don’t it could take days to find (if you are lucky).

A Lost Model Alarm is cheap insurance! $20.00

Floyd had an LMA, he walked/slashed his way straight to the model!

This device uses a state-of-the-art microcontroller giving you advanced features to help prevent the loss of your model aircraft (low battery alarm and interference alarm) and the ability to recover it in the event of you losing it (lost model alarm). Furthermore, DigiAlarm allows you to monitor your receiver battery level during flight by using an audible battery level indicator.

Lost model alarm.
Transmitter interference alarm.
Battery voltage level indicator on power-up and during flight.
Low battery alarm.
Connector pins makes a Y-lead unnecessary.
Low power consumption (alarm sounds for 2 days on fully charged battery).
Compact and light weight.

TECHNICAL INFORMATION
Operating Voltage 2.7 V to 6.0 V

Operating Temperature -20°C to 80°C

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.

BEEP CODES

On power-on, the alarm will sound the beep code according to the battery voltage shown in Table 1. During flight, as the battery becomes depleted and the voltage falls through the various voltage zones (represented by battery voltage level in Table 1), the associated beep code will sound 3 times.

Beep Code
Battery Voltage Level

3 short beeps = More than 5.0V

2 short beeps = From 4.5V to 5.0V

1 short beep = From 4.25V to 4.5V

1 long beep = From 4 V to 4.25V

Morse code ‘B’ (continuous) = Less than 4V

CONNECTIONS

Figure 1 illustrates the connection of the alarm between receiver and servo. Make sure the servo connector is fully inserted onto the alarm connector pins (labeled Negative, Positive and Signal). Make sure the alarm is connected to the same port on the receiver that the servo would normally be connected to. When used in conjunction with other DigiProducts, make sure the alarm is upstream (closest to the receiver). The pin configuration illustrated is compatible with Futaba systems.

Figure 1. Connection Diagram

SETTING UP
Insert the alarm into one of the active channels of the receiver, making sure the connector is correctly polarised (it is possible to insert the connector the wrong way around on some systems - check the colour coding). If you are driving a servo with the channel used by the alarm, connect the servo to the alarm as shown in Figure 1, again ensuring the connector is correctly polarised.

FINAL CHECK
Switch your transmitter on. Switch your receiver on and the alarm should sound a beep code according the battery voltage level. Test the alarm by switching off the transmitter. The alarm should slowly sound the Morse code for SOS. If interference is detected, the SOS Morse code will also sound.

Morse code for "SOS": _ _ _ . . . _ _ _ . . . _ _ _ . . ., etc. With your transmitter and receiver on, if the voltage level of the receiver battery pack should fall below the critical level of 4.0V the low battery alarm will sound the Morse code for "B": Morse code for "B": _ . . . pause _ . . . pause _ . . . pause, etc.