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Arduino Real Time Clock, OLED, RGB LED strip

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This project combines RTC, shows clock on OLED display, and controls RGB LED strip. This project uses the following parts (We included AliExpress link, we bought 20-30 units, and we calculate the average cost with CAD and shipping.)
DS1307 Real Time Clock ~$2.50
https://www.aliexpress.com/item/1876368739.html
SSD1306 OLED display ~$2.50
https://www.aliexpress.com/item/4001066065622.html
WS2812b RGB LED strip (1m 30 IP30) 1 meter 30 LED ~$3.50
https://www.aliexpress.com/item/32966375934.html

This project only need one Arduino, but we use Arduino Uno and Pro (same source code) to create same project in two form factors.
Diagram & connection:
http://www.cmee4k.com/files/ArduinoCode/Arduino_DS1307_SSD1306_WS2812.pdf
Source code:
http://www.cmee4k.com/files/ArduinoCode/ds1307_ssd1306_ws2812.ino
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