i recently got a Dick Smith electronics book from Australia..in the circuits in those books they use the DS548 NPN transistor and the DS558 PNP transisotor..my local electronics shop says tht these must transistors made by dick smith...i remember once buying the C828 NPN transistor instead of the DS548..could anybody tell me the corresponding PNP transistor for the C828, or could u tell me a better subsitute for both..these are needed for simple circuits such as LED flashers, light activated switches etc...