A není lepší si koupít 12V 6A a 5V 6A na napajení těch relatek a servomotorku
http://www.ebay.com/itm/AC-110V-220V-TO-DC-5V-12V- 24V-Switch-Power-Supply-Driver-Adapter-LED-Strip-L ight/152134115704?_trksid=p2047675.c100623.m-1&_tr kparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26as c%3D41375%26meid%3Ddabe282e5bc5407f95a4c13394f4eb3 2%26pid%3D100623%26rk%3D5%26rkt%3D6%26sd%3D3715149 93202
A k tomu 12V trafu dokoupit dva třeba tyto?
http://www.ebay.com/itm/L7805-Buck-Converter-DC-DC -7-15V-9V-12V-to-5V-2A-Step-down-Power-Supply-Modu le-/311605110621?hash=item488d1ca75d:g:0S4AAOSwo4p Yfv8P