Showing posts with label AAA Battery Protection with LED Indicator. Show all posts
Showing posts with label AAA Battery Protection with LED Indicator. Show all posts

Wednesday, November 21, 2018

AAA Battery Protection with Wrong Polarity LED Indicator

This simple circuit will protect AA or AAA battery from wrong polarity connection to your device. If the battery is connected in opposite way, D1 will conduct and PTC Fuse will break the circuit. Wrong polarity indicator, LED 1 will be turned on at the same time.
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Ultra-Precise, Current-Sense Amplifier

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