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本帖最后由 firewise 于 2013-4-13 00:29 编辑
求教各位高手,我的arduino UNO R3采用外部电源供电时,为什么不执行已下载的程序?采用USB供电时,则可以正常运行?
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就是已下载Blink示例程序(LED改其他脚也一样)。
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// Pin 12has an LED connected on most Arduino boards.
// give it a name:
int led = 12;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
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