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Gas-Detector-With-Allarm - Continuously monitor combustible gas (LPG, methane, smoke) with an MQ-2 sensor. When the analog reading exceeds a user-defined threshold, trigger a visual (red LED) and audible (buzzer) alarm for a fixed duration, while a green LED indicates “safe” status. By Bocaletto Luca
MultiEventCountdownTimer is a modern, responsive one-page webapp that lets you manage multiple countdowns and stopwatches with real-time audio and visual alerts. All data is stored locally and can be imported/exported as JSON—no backend, no dependencies, no build step.