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jrjohns
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Iron
Re: Part IV: Fundamentals of Digital Debugging
jrjohns   1/19/2012 2:58:34 PM
NO RATINGS
One note:  A lot of the "Serial" Point of Sale printers are actually RS-232 and will require a signal level adapter between the digital logic levels and the printer.  There are many sources of these adapters.  Be particularly cautious if you connect the printer transmit line to the embedded project as RS-232 levels will generally exceed the maximum voltage input level to the microcontroller. 



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