Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By RichardS
#41764 Use a 5V supply, that will lessen the heat, what else are are driving?? A ESP at 50mA average at most....

9V-3.3V=5.7V*50mA = 0.25W yep warm :-)

5V-3.3V=1.7V*50mA = 0.085W yep must nicer!

Next time you can use a switching supply, you can get them predone in china for $1 :-)

Aliexpress.com

Pack of 10 for 4.60! :-) And good to 2A!

Richard.