LEGO® MINDSTORMS® and Technic®MINDSTORMS® NXTMINDSTORMS SensorsLEGO® technical dataLDrawMiscellaneous LEGO®VEX;LEGO® & PhotographyPanoramic PhotographyPhoto GalleryHome

 

 

    What's inside WeDo 2.0 controller brick 

    Detailed description of WeDo 2.0 controller brick PCB

    Warning: this information was gathered by close looking at PCB and making some voltages and continuity measurement. I may be wrong sometimes!

    PCB top


     

    1, 2

    I/O connectors, dubbed "Power Functions 2.0". LEGO proprietary design, 1.27mm pitch. Square pad denotes pin 1.

    3

    Dual motor driver, On Semiconductor LB1836. Same chip used in NXT, EV3, Power Functions receiver.

    4

    CPU / Bluetooth radio, Texas Instruments CC2640.

    5

    +5V filtering capacitor.

    6

    Boost switcher converter, Texas Instruments TPS61032. Generates +5V supply from battery. Chip is 1A rated.

    7

    +Vbattery filtering capacitor.

    8, 9

    Conditionning chip for IO connectors pin 5/6. Exact function yet to be determined. Powered from +3.3V_CPU

    10

    +3.3V linear regulator (LDO). Exact type unknown. Converts +5V to +3.3V_CPU for CC2640 and (8)(9) conditionning chips.

    11

    +3.3V linear regulator (LDO). Exact type unknown. Converts +5V to +3.3V_IO for I/O connectors.

    12

    Battery connector. Middle pin function unknown, might allow to distinguish between alkaline cells and rechargeable battery.

 

    PCB bottom


     

    1, 2

    I/O connectors, dubbed "Power Functions 2.0". LEGO proprietary design, 1.27mm pitch.

    3

    Piezzoelectric buzzer

    4

    Ceramic Bluetooth antenna

    5

    +5V filtering capacitor.

    6

    Boost switcher converter inductor.

    7

    +Vbattery filtering capacitor.

    8

    Hex Schmidt trigger (74HCT14), +5V powered. Function unknown. Lower threshold of HCT compared to HC could mean it's used as level translator for 3.3V signals to 5V domain.

    9

    Power on push button.

    10

    RGB LED.

    11

    Input fuse on +Vbattery. Seems to be a Bourns MF-NSML150 resettable fuse, 1.5A rated.

 

LEGO® MINDSTORMS® and Technic®MINDSTORMS® NXTMINDSTORMS SensorsLEGO® technical dataLDrawMiscellaneous LEGO®VEX;LEGO® & PhotographyPanoramic PhotographyPhoto GalleryHome