Stap 1: schematisch
the MOSFETs should be the irf3205 here is a link to buy them on ebay: http://www.ebay.com/itm/like/360750944641?lpid=82&chn=ps&ul_ref=http%253A%252F%252Frover.ebay.com%253A80%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmtid%253D1588%2526kwid%253D1%2526crlp%253D53601919689_324272%2526itemid%253D360750944641%2526targetid%253D124316371209%2526rpc%253D0.21%2526rpc_upld_id%253D45240%2526rlsatarget%253D%2526device%253Dt%2526mpre%253Dhttp%25253A%25252F%25252Fwww.ebay.com%25252Fitm%25252Flike%25252F360750944641%25253Flpid%25253D82%252526chn%25253Dps%2526adtype%253Dpla%2526gclid%253DCjwKEAjwxKSoBRCZ5oyy87DimEcSJADiWsvgEt7EV_MccRHNkepUiHGVMu32S6fvUquD5IHPOGKUGhoCAZ3w_wcB%2526srcrot%253D711-117182-37290-0