electronics

[Damo17]

TT: the only way to confirm something like this is to construct the circuit and experimentally test it out.

A diode has a forward voltage as well as a reverse voltage (usually excluded as it almost always lead to permanent damage to it). I'm not sure if 6V is enough to kill the diode in reverse bias, but if it is, there will be some interesting complications.

The max voltage a reversed bias diode can take before braking down is usually 50v+. But this depends on the doping of the p-n junction. Take for instance a zener diode which has a heavily doped p-n junction, it allows electrons to tunnel from the valence band of the p-type material to the conduction band of the n-type material, such that the reverse voltage is kept to a known value.

[bigtick]

For commercially available Zener diodes, breakdown voltage values range from 2 to 200V.
http://itute.com/board/viewtopic.php?f=6&t=607&p=1228#p1228