Simple to use Lipoly low voltage alarm that is small and light for on board use, plug's into balance lead for detecting low voltage on individual cells. A loud alarm will sound and LED will change from Green to Red if any individual cell drops to 3.3v or below.
Spec. Lipoly Range: 2s~4s Size: 38x25x11mm Weight: 7g Voltage Accuracy: 0.03v Low Voltage Alarm Threshold: 3.3v (per cell)
I'd be inclined to agree with what Andrey has implied, and say that the 4S isn't keeping up. It may be old and tired, or perhaps it is just not rated well enough for the purpose. A hex can use a lot of power. If I fly my 450 quad hard and/or in windy conditions on a 2200 3S, the motors will work harder and I can elicit the same behaviour from the alarm as you describe. On a 4500 3S it is quite ok. Same would apply to a lower capacity/C 4S (maybe more so as it will need to supply more current at the higher voltage). What are the capacities and C ratings of your 4S and 3S batteries?
You say, with a 3S lipo, it doesn't work? maybe you're connecting it to the 4 upper positive pins, the black wire of the balance connector in lipo has to connect to the ground pin (-) . About the beeping as you apply throttel, maybe your batt is not big enough for the 4 motors, or C rating is small. what batt do you use, and how many amps do your motors take?
This unit can only be plugged in before running your Rc correct.
If your storing your Rc overnight you have to disconnect from balance plug as the leds that are on will drain lipo ?
Bit of a pain when you have to take apart radio box etc or is there a better way.
Greg, the units and leds take around 60 mA of current. If you have a 2200 mAh lipo, so in a day and a half the lipo will be drained. The idea of this device is to plug it before you use your RC gear, and disconnect it after use. Otherwise, you also risk weaking up in the middle of the night, frightened by the loud noise of the buzzer :-)
Fortunately, no! On the other hand, It wouldn't be the first time my cell phone starts to beep in the middle of the night :-)
1 thumbs up!
4 Stück gekauft, wurden vom Zoll beschlagnahmt weil das CE-Zeichen fehlt. HobbyKing leistet keinen Ersatz und fühlt sich nicht zuständig.
11 comments. Reply..
I love this smal alarm system. Easy to fit and very safe. After connetion, it check every cell of your Lipo and the horn will be activated for a second. It is very loud and a nice working tool for more saftey.