Sollar powered BlueTooth microphone

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Sollar powered BlueTooth microphone

• Autor Libor Hrbek
• Director Ing. Miroslav Skrbek Ph.D.

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Specification of project

• Make microphone which comunicates trought
  wireless BlueTooth device
• Sollar powered, continuous running
• Meaning of device
• Noise scanning in the intelligent room without
  wire usage
• Use ecological energy without battery changing
• Meaning of project
• Attest ability of BT audio channel to transfer
  audio in required data and bitrate
• Attest Sollar power supply

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Block diagram
Solar cell 8V 180mA
Accumulator 6V 3,4Ah
Voltage changer 5,5-11,5V /3V
PC - Master
BT microproc.
Microphone
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Basic parameters of choice

• For BT module
• High data transfer
• Low consumption
• availability
• For charge
• Dimensions
• Wattage
• For Batterry
• Dimensions
• Weight
• Capacity
• Easy charging

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Explored BT modulesConnectBlue 33i, ToothPIC

• Disatvantages 33i
• Not available
• Range 100m (security)
• Need power control
• Need control microprocessor
• Disatvantage ToolPIC
• High power consumption more then 1W
• Small data flow 50kBauds
• Not available audio interface

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Explered BT modulesfree2move Class 2 Module

• Parameters
• Very low consumption 250mW
• Highest date transmition 235kb/s
• Power supply 3V available battery feeding
• Integrated 15 bit audio codec
• Range 20m
• Small dimensions
• Sample rate 8 kHz

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Accumulator

• Estimated consumaption max. 0,5W
• Power charge need back up fof 4 days, when is not
  enought light intensity
• Necesary battery capacity without spare circles
  0,5W x 24 x 4 48Wh gt 48W/6V 8Ah
• In case when device is in stand by mode, when
  noice is smaller than rated then estimated
  consumation is less than half

• We choose gel accumulator 6V/3,4Ah
• Advantages simple battery charging
• Continual battery charging

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Solar cellSolartec 8-180

• We choose 8V/180mA
• Technology monocrystalic silicon - effectivity
  16
• Dimensions 183x125mm
• Weight 0,31kg
• Supply power in season
• Winter 1,5W
• Spring, Autumn 4W
• Summer 8W

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Finish

• Has choosen free2move Class 2 Module
• Solar cell after consultation with firm Solartec
  and with regard to power has choose SMP 8 180
• Has choosen gel acumulator Philips 6V/3,4Ah
• For power supply 3V has choosen power changer
  MAX653

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The endThanks for your attention

• Libor Hrbek