Hi,
Some interesting stuff.
http://www.circuitcellar.com/library...9/c99cdpdf.pdf
http://www.circuitcellar.com/library.../c109cdpdf.pdf
http://www.circuitcellar.com/library...99/c1299cd.pdf
(In the first link they talk about the ULN2003A).
Best regards,
Luciano
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