||<tablewidth="520px" tablestyle="text-align: center;"bgcolor="#ffffa0"> {{http://mikrokopter.de/images/deu.gif}} Seite in [[UndervoltageSettings|deutsch]] ||<bgcolor="#ffffa0"> {{http://mikrokopter.de/images/fra.gif}} Page en  [[fr/UndervoltageSettings|francais]] ||

<<TableOfContents>>

= Undervoltage setting =
You find the undervoltage setting in the 'Misc' tab of the settingsdialog of the MK-Tool.


You can set the limit to a fixed value like 13,2V (value 132 in MK-Tool) or you insert the limit of a single LiPo cell (like 3,3V) (value 33 in MK-Tool)<<BR>>
If you set the limit to a single cell voltage, the FlightCtrl will auto dectect the used LiPo cells at startup.


= Voltage reference FC V2.1 =
A 3,0V voltage reference is used in the FlightCtrl by default.<<BR>><<BR>>
/!\ There are a few FlightCtrl '''V2.1''' (sold 10/2010 - 12/2010) where a 3,3V voltage reference may was assembled.<<BR>>
This results in a voltage measurement, that is 10% too low and the under voltage warning is generated too early.
<<BR>><<BR>>

You can find the voltage reference (IC7) here:

{{attachment:UndervoltageSettings/FC_21_IC7.JPG}}

{i} With a loupe you can see the marking (only the first two letters are important): 
 . '''CR'''xx = 3,0V - voltage reference (default)
 . '''CS'''xx = 3,3V - voltage reference

<<BR>><<BR>>
To select the assembled voltage reference, just open the settingsdialog while pressing the 'ALT key' (MK Tool V1.72a or higher). Go to the undervoltage setting and select the voltage reference:

{{attachment:UndervoltageSettings/voltage_reference.jpg}}

<<BR>>

{i} Hint: You have to use a FlightCtrl-Firmware V0.82b or higher. -> [[en/Firmware-0.82]]