The first 105 Alpha 7 are built and we get some feedback that sometimes the Atto Kellermann LED indicator is burning out. So far we have 3 cases with this problem.
It looks like some Attos cannot handle the 14.4V from the lupine battery. But there is good news. The fix is easy and cheap.
On the electric diagram of the Alpha 7 you can see on position 16 we solder in the minus wire of the Atto's a metal film resistor of 10 ohm axial lead 1W. This will fix the problem, they cost around €0.10- and to solder them between is about a 10 minutes job.
Here are some links where you could buy them: