Tunable light source prototype

summer training camp

Functional concept

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• Control full-color LED light source through mobile app
• Controllable light source color
• Controllable light source brightness
• Light source can be turned off manually
• Create multiple sets of ambient light sources for LEGO stop-motion animation

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Hardware design (split into three PCBs)

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Main control board + lithium battery + charging circuit

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• MCU module ESP826612E module
• LDO drops 3.3v to power the MCU
• TP4056X charging circuit
• Automatic disconnect design. Inserting USB automatically disconnects battery power and switches to charging state
• Manual switch design. Option not to use battery (no charging or power supply)

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LED light source board

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• 30mm x 30mm
• 8 WS2812 master-controlled 5050 full-color LEDs connected in series
• Powered by main control board
• 3D printing condenser mask
• Make the light source and main control into a desk lamp style

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Expansion interface board

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• CH340C USB UART
• Automatically set GPIO0 to enter download mode circuit
• I2C OLED interface, can be used as a debugging display during development
• Connected by 2x6P pin header and main control board
• Download the program and use it when debugging the program
• With reset and boot keys

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software design

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• Burn Micropython firmware
• Use Python as a development language
• Alibaba Cloud or Gizwits Cloud