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EMC Basics #15: Use gaskets to seal and solve leaky RF seam problems

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In this this second part of LED Lighting Craze series, we focus on reliability. I found some interesting information on LED reliability for the components as well as the lights as a whole.
In my system the SPI interface for the ADC is returning 0xFF for every read. What could be wrong?
In this case we have a circuit that worked well at one operating point, but reliably self-destructed at another operating point. The active load circuits were the same. The transistor power dissipation was the same. The engineer pulls out his hair and cries out to the heavens: ‘What is going on?’
In this part, we go to greater depths to look at TL431 dynamics. Adjust your air regulator for the deeper dive. What is seen in the data sheet plots of gain and output resistance for some manufacturers is at first hard to believe.
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