[B number display] B station has one million fans sign!

B number display
        Recently, with the continuous efforts of me and everyone, my number of fans has finally exceeded 10,000. In order to thank all the fans for their continued support and to motivate myself, I designed this B number display by imitating the million fans medal of B station, so that I can see the changes of my fans in the first place. This project is based on the Internet of Things chip ESP8266 of Espressif, with WS2812 full-color lamp beads as the display body, and draws on the full-color LED solution of Core Bibi to design this fan light board that can update the number of fans in real time.
1. Hardware part In the hardware
        part, ESP8266 is used as the main control MCU, and the fan data of B station is obtained through API and WS2812 is driven in real time to display the corresponding fan value. In order to avoid additional external power supply, the hardware part is powered by lithium battery, and the battery charging circuit is designed with the help of battery management chip TP4056.
        The whole machine has only one USB interface, which is used to charge the battery and download programs for ESP8266.
        For the power supply, we choose the LDO chip SPX3819M5-L-3-3/TR to convert the battery voltage to 3.3V to power the ESP8266.
        For the main control MCU, we simply draw a minimum system of ESP8266, and bring out the GPIO5 pin as the control pin of WS2812.
        The USB to serial port circuit/program download circuit uses the CH340G chip, and uses two S8050 transistors to complete the program automatic download circuit.
 
2. For the structure part
        , in order to make the overall design more beautiful, in addition to the circuit design, it is also necessary to design a shell for the device. Since there are no customized products that meet the requirements of the photo frame on the market, I used 3D modeling software to design the shell of the entire device. On the front of the device, four cylindrical slots are reserved to fix the circuit board.    
     In addition to the outer frame, since the LED lights on the circuit board are too scattered when used directly, a lampshade is also designed here to cover the PCB board to gather the light beam.
        The 3D rendering of the PCB and the lampshade is shown in the figure below.
 
        Finally, there is the golden small TV. After observing the medals of Station B and adding my own imagination, I designed this golden small TV in 3D modeling software, and finally chose CNC brass and mirror polishing technology to process it. The final effect is still lever.
        The real object after processing is also handsome to me. The left one is aluminum CNC sand gold bright anodized, and the right one is brass CNC mirror polished.
        In the end, the combination becomes a cool million fans medal. 2.     The final designed object
of the structure is shown in the figure below:     All the information of this project will be placed in the attachment, and interested friends are welcome to copy it.