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In MCU-based projects, this design uses a single push button to switch on and switch off 5-V and 15-V supplies in sequence.

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Katherine Haan, MBA, is a Senior Staff Writer for Forbes Advisor and a former financial advisor turned international bestselling author and business coach. For more than a decade, she’s helped small ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Annemarie Conte Annemarie Conte writes the Ask Wirecutter column, ...