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6kbps(down-load/up-load)
Load resistance: 10KΩ
storage registers or where ever a small memory is required
005 and SIMCOM enhanced AT Commands)
Sound Detection Sensor (KY-038) knock 6kbps(down-load/up-load)The sound detection sensor module detects the intensity of sound where the sound is detected via a microphone and fed into an LM393 op amp. It comprises an onboard potentiometer to adjust the setpoint for sound level. Features: Operating Voltage: 3. 3V to 5V DC LM393 comparator with threshold preset PCB Size: 3. 4cm * 1. 6cm Induction distance: 0. 5 Meter Operating current: 4~5 mA Microphone Sensitivity (1kHz): 52 to 48 dB Easy to use with
US$ 213.00
US$ 152.00