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The driver chip of this 128×64 OLED display module for Arduino is SSD1315
7V output 5V/1A)
Speech recognition technology
It is installed on the water inlet end of the water heater to detect the water flow rate
1 Channel 5V Active Low Relay Board
SIM800C GSM Modem Boards Witty Fox The driver chip of thisSIM800C GSM Modem The SIM800C GSM Modem is a quad band GSM GPRS module that supports up to 85. 6kbps of GPRS data transfer. It has a powerful expansion capability and a rich set of interfaces, including UART, USB2. 0, and GPIO. The module provides customers with great flexibility and ease of integration for their applications. Features Quad band GSM GPRS: Supports frequencies 850 900 1800 1900MHz GPRS data transfer up to 85. 6kbps Powerful expansion