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it has almost identical performance without the additional cost of a buck converter
Features include: a 2
The MAX7219 does all the control and refresh work for you in driving the 8x8 matrix display
It attaches to Raspberry Pi by way of one of the small sockets on the board upper surface
5V power indicator on board
CCS811+HDC1080+BMP280 Heat Shrink it has almost identical performanceCJMCU 8128 gas sensor, chip on chip system (SSoC) + temperature and humidity sensor, uses low power sensing technology to detect volatile organic compounds (VOCs) in the room. CJMCU8118 onboard CCS811The structure diagram we can see that this is not a simple sensor, it has integrated MCU, the sensor has an onboard processing capability, without host intervention, can provide the equivalent level of carbon dioxide or total volatile organic compounds
