Please note that while making this project we did not put any circuitry for charging the battery, because it will make the board heavy and it will be very difficult to drive that thing. In this circuit, we have used the GPIO0 instead of GPIO2 because after testing a lot of ESP8266-01 modules we have found that the GPIO0 is more stable than the GPIO2 of the module. If you don't have the module you can use LED strips as a replacement. There are a total of 8 LEDs in the Neopixels, and we utilised a self-module to power them. The brain of the circuit is the ESP8266-01 module which is powered by a 3.7V, 400mA Lithium battery, and the WS2812B LEDs are connected to the GPIO0 of the ESP8266-01 module. The schematic diagram for the WS2812B and ESP8266-01 based POV Display is shown below and as you can see it's pretty simple and easy to understand. And a 12V battery (to supply the motor). The components required to build the POV Display are easy to acquire and cheap.
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