mercedes ir small key coil impedance

[verica]

hi to all have this mercedes ir key small one nec mcu inside it have coil like all other keys have it it is broken i need info for impedance and how many turns to make new coil

[agabna]

hi to all have this mercedes ir key small one nec mcu inside it have coil like all other keys have it it is broken i need info for impedance and how many turns to make new coil

hello
i think if yoy found other used key and replace the coil
save your time it better than made your own

[pepi]

The impedance I dont know, the length of wire is 1.11m resistance 3.1ohm. If the body of coil is broken you need another coil because you can no reach impedance on the broken coil.

[triak88]

Hi,
Every coil have paralell with coil a cap (parralell circuit).Their FR-(resonance freq) for cummunication is 125khz .If you meassure the cap paralell to coli you can from formula get inductive of coil. Formula is

http://t1.gstatic.com/images?q=tbn:ANd9GcTwY1_ql3aJaeGc4wx3VDPd6f2QvvILi gb7Hs6bC4OxI28KmhDS

[verica]

found one from other key finish job