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If you want something really simple
ATMega32 AVR Microcontroller — 8-Bit AVR 40-Pin
3V (HIGH) / 0V (LOW) Detection Range Up to 3m Detection Angle ~100° Delay Time ~8 seconds (fixed) Trigger Mode Single trigger (non-repeatable) Standby Current <60 μA Operating Temperature -20°C to +80°C Dimensions ~10mm × 23mm (mini form factor) Pinout
standalone audio player module that decodes and plays MP3 audio files stored on a TF (microSD) card or USB flash drive (U-disk)
Smart home light automation
Mic Module pH Sensor If you want something reallyMic Module Description The Mic module best price in Lahore Pakistan can be used for sound audio detection, it comes with the basic components for you to get started. Supplying power and it is good to be used. The is only digital output. Threshold can be adjusted with on board potentiometer for the digital output. Simple usage as it is digital output, so you will know whether there is sound or not. Comes with a M3 mounting hole for ease of attaching it
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