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  • Build your own Variable Lab Bench Power Supply

    Pot question ... you list one logarithmic and one linear in the parts above. Is it important to use them as listed, one of each? Or can they both be logarithmic or linear?

    In my case, I will use this to locate a short to ground on laptop mainboards. Set the voltage to the rail requirement, and slowly bring up current. The will make a component that is shorting to ground heat up, making it identifiable. Or in some cases, the bad component will blow. In the event it's a short inside the board, at least there will be a hot spot. Unfortunately, the laptop power supply shuts itself off when there is a short to ground on the board. Making it difficult to locate the problem area. Using this bench supply, will hopefully come in handy.

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