UM1996

Circuit description

DocID028716 Rev 2

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Figure 13: X-NUCLEO-IHM08M1

– Current sensing circuit (1 of 3)

Figure 14: X-NUCLEO-IHM08M1

– Current sensing circuit (2 of 3)

Figure 15: X-NUCLEO-IHM08M1

– Current sensing circuit (3 of 3)

4.2

Analog section

4.2.1

Hall/Encoder motor speed sensor

The X-NUCLEO-IHM08M1 expansion board implements the Hall/Encoder sensor detecting

circuit for speed measurement, the schematic for which is given in the figure below. The

motor sensor pin, through the J3 connector and an analog circuit, are connected to the

STM32 Nucleo board in order to determine motor spin; a +5 V and GND are also provided

to power the sensors. Jumper JP3 is available for sensors that require external pull-up (see

jumperSETtable).

Figure 16: X-NUCLEO-IHM08M1

– Hall/Encoder sensor circuit