IoT Start - NODEMCU V 0.9 (ESP8266) LED DOT MATRIX (8X8) ------------------------ ทดสอบ 1 ช่อง D0,D1,D2 VCC - To be connected to NodeMCU Vin. 3.3V GND - To be connected to Ground
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esp8266 - How do I find out the maximum current through VIN on a NodeMCU board? - Arduino Stack Exchange
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