network clock

first prize

This project uses ESP-01 as a WiFi module to retrieve the network time from the Alibaba Cloud platform and control the four-pin 0.96- inch OLED module to display the current time through IO0 and IO2 . The perception of external light is achieved through a GL4528 10K-20K photoresistor, and the voltage is compared with a 10k potentiometer. The comparison result is transmitted from the lm393 chip to the STC15w408AS pin to determine whether the brightness at that time is higher than the preset value. If it is higher than the preset value, the microcontroller turns on the MOS tube to power the ESP-01 and OLED display. If it is lower than the preset value, When the setting value is set, there is no power supply. In addition, there is a tact switch. When the tact switch is pressed, the time can be displayed even at night. The circuit is powered by a 600MAH polymer lithium battery and has a TC4056A 1A lithium battery management chip to control the lithium battery charging process.