in this revision:
- consultation remarks from Doc Vorel
- used iso7241 instead od PC847
- board dimensions 82x94mm
- used IRFB4115 instead of IRFP260N or IRF2807
091118:
- changed positions of FETs, to be more accessible for mounting cooler
- some minor pathways changes
091119:
- added forgotten condensator on ISO7241 power supply pins!
091122
- added switch option for LTS 25-NP power supply pin (in case that ISO7241C shall be powered by 3.3V)
- some power pathways strenghtened
100119
- some parts changed to SMD, some labels added, holes made 3.2mm