74ls245
http://www.datasheetcatalog.org/datasheets/150/231645_DS.pdf
At89s51
http://www.atmel.com/dyn/resources/Prod_documents/doc2487.pdf
ULN2803
http://www.datasheetcatalog.org/datasheet/motorola/ULN2804A.pdf
7805
http://www.datasheetcatalog.org/datasheets/228/390068_DS.pdf
BC328
http://www.datasheetcatalog.org/datasheet/fairchild/BC328.pdf
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