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Simple Printer Port Interface, Input-Output - del20005Port Circuit to see the inputs logic state and drive a few outputs. This page triggered by "Use of a PC Printer Port for Control and Data Acquisition" Printer Port Page of Peter H. Anderson.So i made some example circuits and VB programs for students. A demo Milli Volt source, Digital Voltmeter and Logic Analyzer examples for learning, are on these pages. I have tried to derive power from PC itself in this circuit, Care should be taken not to short circuit or apply any voltages above 5V to PC Port Pins. There are protection in all chips these days, but you may stress the limits, so design and use opto couplers to be on the safer side. See Parallel printer port. that uses opto-isolators. and Opto-isolators. |
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| Simple Printer Port Interface, Input-Output - del20005 |
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The vb programs works well on xp-p4 and may not work well on win98-P2 (speed). Logic inputs in above circuit are floating add a 100K to ground for all 5 inputs if you want to use it as a logic probe.The Logic Analyzer Program is here dla_demo.zip . Demo Logic Analyzer 100KHz VB6 program with source code, can be tried with this circuit. An Example to get fast time in uS as vb timer min. 1ms is here perftmr.zip. The design source is here 20005.zip. A visual basic 6 program with source, to test this circuit and experiment is here dpc_demo.zip. More Information. |