How to Verify Orcad Circuit Matches Real PCB Schematic and Ensure Accuracy?

The discussion centers on verifying the accuracy of an Orcad circuit design against a real PCB schematic, specifically for a 12 V DC motor speed controller. The original poster seeks guidance on comparing the Orcad schematic with the physical circuit and confirming its correctness. Respondents request the actual circuit diagram or Orcad design files (.DSN) for review, emphasizing the need for proper documentation such as screenshots or PDFs. It is noted that without Orcad software, obtaining a .DSN file may be difficult. The circuit in question appears to be an oscillator and gate driver intended to control motor speed, with suggestions to consider adding an RC filter to the supply for noise reduction. An alternative recommendation is to use LTSpice, a free simulation tool, along with reference designs like those available from Linear Technology to simulate and validate the circuit before implementation.
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