Take for example this ESP8266 clock by [ZaNgAbY] that’s housed in ... Inside the jar there’s six 8×8 MAX7219 LED matrix modules tacked together to create one long strip, with a NodeMCU ...

“An analog IoT LED clock running on an ESP8266, driving a WS2812B LED strip, constantly synched using an NTP server and controlled by your smartphone via a web server. Actually, It is not that ...

For most hackers and makers, building a clock is a rite of passage ... The LEDs are courtesy of a standard 8×8 RGB matrix, with a custom 3D-printed shroud to hold the light pipes in place ...