Rolf,
if you think your trigger signal is too weak just decrease the
resistance in series with the bulb, or just take the bulb out.
Bedini uses the 555 timer as an oscillator to pulse a opto-triac to
discharge a capacitor into the charging battery, and it oscillates
completely independant of the rotor spinning. It's a completely
different set up.
However, the 555 timer is a pretty interesting animal and might come
in handy later on for this kit.
Meehow.