Markel 2 Posted November 4, 2018 Share Posted November 4, 2018 Hi, At a previous project I turn on and off power to ST LIS3DH Accelerometer using a MOSFET Circuitry. This is so to make sure the I2C Sensor is not consuming current when not in use. A colleague of mine designed to power a ST LSM303AGR from one of the MCU IO Pins. The MCU IO voltage is enough to power the ST LSM303AGR, so, should work. But, powering I2C Sensor from MCU IO Pins is not the usual way and new to me. Do you think that powering the ST LSM303AGR from one of the MCU IO Pin is okay or is not recommended? Regards, Markel Quote Link to post Share on other sites
Rei Vilo 692 Posted November 4, 2018 Share Posted November 4, 2018 You need to read the data-sheets of the MCU and the sensor and check the mA provided and used. Markel 1 Quote Link to post Share on other sites
NicholasLindan 4 Posted November 9, 2018 Share Posted November 9, 2018 I've done this on products - powered an analog section off an I/O pin. It is the cheapest power control method - heck it's free and it takes no power to implement. If you need more current you can parallel two or more pins. There is no problem with parallel MOSFETs, they will current share as rdson increases with temperature. Markel 1 Quote Link to post Share on other sites
Markel 2 Posted November 9, 2018 Author Share Posted November 9, 2018 Thanks. Quote Link to post Share on other sites
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