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Tag Archives: Electronics circuits

IR Remote Control

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DIGITAL STOP WATCH

Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926). IC MM74C926 consists of a 4-digit counter, an internal output latch, npn output sourcing drivers …

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Fridge Door Alarm Circuit

This fridge door alarm is using a 3V battery supply should be placed (in a small box) in the fridge near the lamp or close to the opening. With the door closed the photo resistor …

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Infrared Beam Break Detector

Application An infrared detector that sounds a buzzer when an IR beam is broken, meaning the IR signal is lost. A pulsed IR signal generator is necessary, but not included in this post. This project …

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Arduino