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مرحل بقناة واحدة 5V High-Low Trigger
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1 Channel 5V Relay Module Board Shield for Arduino with Optocoupler Support High and Low Level Trigger
Maximum load: AC 250V/10A, DC 30V/10A
SMD optocoupler isolation, strong driving ability, stable performance; trigger current 5mA
The module voltage 5V
The module can be set high or low triggered by jumper
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High Sensitivity Microphone Sensor AVR PIC Sound Detection Module
The module has 2 outputs: AO, analog output, real-time output microphone voltage signal; DO, when the sound intensity reaches a certain threshold, it outputs high and low level signals, [threshold-sensitivity can be adjusted by potentiometer]