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kangbeonghyun edited this page Jun 22, 2020 · 19 revisions

OVERVIEW













COMPONENTS

  • Solar panel: SCM 5WA/300mA/18V/240x180x23(mm) (1EA)
  • Raspberrypi: 3B+ (3EA)
  • Light sensor: GY-30 (3EA)
  • Controller: ESC1206 (2EA)
  • Battery: KB 4.5Ah/12v (2EA), AA 1.5Vbattery (8EA)(optional)
  • Stepper Motor: NEMA17/ 12V/0.4A/1.8 degree/ 280mN.m holding torque (1EA)
  • Motor driver: L298N (1EA)
  • Converter: Boost-Buck Converter-LM2577,LM2596/ input voltage:3.5V-28V/ output voltage: 1.25V-26V (1EA)
  • etc) Holder, wires, somethings for balancing.

TOP

  • Solar panel
    • Receive electronic power with rotatation.
    • Expected power generation: 5W(Solar panel)* 3.5h(average amount of Sunshine)=17.5Wh

MIDDLE

  • 3 light sensor and 2 Raspberrypi
    • Each light sensor connect to each raspberrypi(another one is located at bottom)
    • Each light sensor receive light value and tranfer it to raspberrypi
    • Each raspberrypi receive the value and send it to Server
def readIlluminance():
    i2c = smbus.SMBus(I2C_CH)
    luxBytes = i2c.read_i2c_block_data(BH1750_DEV_ADDR, CONT_H_RES_MODE, 2)
    lux = int.from_bytes(luxBytes, byteorder='big')
    i2c.close()
    return lux

BOTTOM(Main part)

  • There are 4 parts as function.

    • Solar system: controller receive solar energy from solar panel, store it to battery and tranfer energy to raspberrypi( it is neccessary to step-down voltage using converter because output voltage (12V) lead to burn off the raspberrypi)

    • Learning & motor control system: raspberrypi read each of light sensor and do reinforcement learning, then result angle value is transferred to stepper motor through motor driver.

    • Transaction system: if provider confirm to transaction with consumer, read ‘OK’ sign then, start to transfer energy to consumer until time(calculated as amount of token) in our blockchain

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