haha180 发表于 2015-3-10 15:44:38

arduino uno为什么不能给esp8266模块供电？

使用arduino uno上的3.3v输出电源给esp8266供电，无法启动，是不是因为arduino功率不够？

i7456 发表于 2015-3-10 17:13:34

The power pins are as follows:

VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
5V.This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.

haha180 发表于 2015-3-10 17:38:42

原来是电流太小的原因，多谢{:soso_e100:}

suoma 发表于 2015-3-10 18:41:03

arduino板子电流太小了

林定祥 发表于 2015-3-10 19:21:12

我现在UNO用电脑USB供电，ESP8266用UNO上的3.3V已经2周了十分稳定。
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