The new BI2 black vibrator development board

The new black BI2 board is ready. I have a few assembled boards ready for shipping. Have a look at www.tindie.com

3 JST 1mm plugs (battery, motor 2, motor 3), LED, reset button, M+/M- is for motor 1

JST 1mm plug for motor 1, alternative RESET button

Features

  • ESP8266 Microcontroller with WLAN
  • MPU9250 (accelerometer, gyroscope)
  • LiPo battery charging
  • 3 motors can be connected (simple motor driver circuits)
  • 1 WS2812B LED – a  colourful LED (16 Mill. colours). They are commonly known as Adafruit Neopixel – a strip or a ring of individual programmable LEDs (when use the WS2812B only two motors can be connected)
  • design based on the great Adafruit Feather Huzaah ESP8266
  • vibration motors and LiPo battery can be easily connected with JST 1mm connectors
  • two reset buttons (the button next to the USB connector can be overmolded)
  • USB connector for battery charging and code uploading
  • programmable with the Arduino IDE or NodeMCU
  • white LED for indicating charging
  • standard LED (yellow) on GPIO00
  • round 40mm diameter

 

There are 3 free GPIO ports. Standard layout are for driving 2 motors (GPIO 12 = M2, GPIO 13 = M3) and 1 LED (GPIO14). Alternatively you can use 3 motors (GPIO12,13,14) but no LED.

Standard: SJ2 not connected, SJ3 connected

Alternative: SJ2 connected, SJ3 not connected

 

Here is the schematic which is adapted from Adafruit.

References:

  • Quick start up guide with Blynk app is here
  •  Assembling a silicone molded vibrator with 3D printed form – tutorial here
  • Complete guide including wireless charging, control with Node-RED and data transmission via MQTT is here

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