Troubleshoot your car battery with ATtiny

Last winter I experienced some problems with my car battery. I knew that it was about time to replace it so off I went to buy a new one. This fact reminded me of an old article about a car battery/charging system diagnostics kit I had seen in one of those 1980s electronics magazines. That magazine’s battery monitor relied on an IC that had several analog comparators arranged in a way similar to the ones in ...

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