Left (slowest) rotor
A
start pos.
Middle rotor
A
start pos.
Right (fastest) rotor
A
start pos.
Reflector (UKW)
Signal path: where this letter actually goes
press a key below · key
· Plugboard
in
· Right rotor
fwd
· Middle rotor
fwd
· Left rotor
fwd
· Reflector
UKW
· Left rotor
back
· Middle rotor
back
· Right rotor
back
· Plugboard
out → lamp
Keyboard (the QWERTZU layout the real machine used, not a straight A-Z grid)