Using MOSFET to turn on/off a sensor controlled by ESP8266 – electronics.stackexchange.com

Using MOSFET to turn on/off a sensor controlled by ESP8266 – electronics.stackexchange.com

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I want to power an MCU (ESP8266, 3.3V) and an ultrasonic sensor (HC-SR04, requires >= 3.7V) using AA batteries. By using an efficient LDO (MCP1700T-3302E) and spending much time in deep sleep mode, ...

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