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Aquarium and hydroponics flow monitoring
Full-speed USB 2
5 × Flow rate (L/min)
It supports MP3 control mode、Key control models (5-voice)、Loop play mode and two-line serial control mode
this module allows for a reasonably fast charging rate
4MHz Crystal Oscillator black Aquarium and hydroponics flow monitoring4MHz Crystal Oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency. Features: Frequency stability. Small in size. Low cost. Easy of interfacing. Applications: Resonance circuit. DIY projects. Electrical electronic projects. Clock generator for microcontroller. DTMF decoder. 4 MHz 20ppm Crystal 35 Ohms HC 49 U WE
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