-
WTV020-SD-16P is a low cost and easy to use MicroSD MP3 module which supports WAV and AD4 formats. It support upto 1GB SD cards. It requires a 3.3V power supply for its operation and its power consumption is very low. You can easily copy voice files to SD Card using PC and it should be in FAT format. This module can be easily interfaced with Arduino Boards, Microcontrollers etc. It can also be used as standalone without any MCU. Please read the datasheet carefully before using this module.
-
4-channel relay output modules, relay output contacts 250A 10A. Input IN1, IN2, IN3, IN4, the signal line LOW effective. VCC, GND power input, can relay a separate power supply relay power input of JD-VCC. Uses: support all MCU control. the industrial sector PLC control smart home control Wiring: VCC: positive power supply system GND: System power supply negative IN1 - IN4: relay control ports