This Module ultrasonic HC-SR04 is for InMoov distance sensing. It is compatible and can be connected to the NervoBoard. Each NervoBoard supports 1 module. You will need two of these if you build the full chest of the robot. Tension range 3-5.5V IO Tutorial: https://inmoov.fr/howto-ultrasonic/
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Neopixel Ring for stomach
16 Bits 16 X WS2812 WS2812B Module 5050 RGB LED Ring Lamp Light with Integrated Drivers
Voltage:DC 4-7V
Communication interface:Single-wire communication
LED Chip:WS2812B
Inside Diameter :3.2 cm
Outside Diameter: 4.5 cm