I don't suppose there is a manual in English somewhere? My German is rusty
(http://www.loet.de/download_en.html).
Suggestions on how to build/where to find such a voltage regulator? The manual isn't very helpful in that respect - at least as far as I can make out. Would adding a resistor to the +5V line be sufficient?
either power supply or PCI bus has 3.3 V. The manual is not telling much about that - I saw no english version around. the manual talks about those jumpers and what to avoid when both sockets are populated. the circuit can also be the basis of other designs such as capacity measurement board. --Q