Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)
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By Jalal711
#76360 hi everyone i have build my first projet using ESP8266 nodemcu and OLED, Tinygps, it work correctly when i use the power of pc, but if i use the external power like a battery off 9v it power on and it doesnt delivred 3.3 in pin out what's the problems? and how can i solve it