Hardware, Design PCB for Safety.

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I'm always frustrated when products are not designed for safety from the start. It is a beginner mistake because colleges do not typically teach this requirement. Usually, young engineers have to learn it at their first place of employment.

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Design for Safety

Product should not be a shock or fire hazard.
Reference UL507 Articulated UL Test Finger Accessibility Probe PA100A for Electrical Safety Test Safety Standards Thorn Probe
(See: https://www.amazon.com/Articulated-Finger-accessibility-electrical-standards/dp/B0716YYXN2)

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