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pinMode(8, OUTPUT);

Serial.println("Ready!");

}

uint8_t i=0;

void loop() {

digitalWrite(8, HIGH);

logfile.print("A0 = "); logfile.println(analogRead(0));

Serial.print("A0 = "); Serial.println(analogRead(0));

digitalWrite(8, LOW);

delay(100);

}

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You'll draw 11mA or so for 100ms during the delay(100) line. Since we blink the pin #8 LED, we'll also get a 11mA

blip for about 10ms. The data for the SD card is buffered which means that whenever we reach 512 bytes of log file

that needs to be written, the SD card will actually write the data. When this happens you'll see a 50mA pulse for

10ms. If you use flush() to write the log file, this pulse will be much longer, as you have to write the file as well as

the file table sectors. Your 50mA spike could end up being 500ms or longer. So basically, keep your file writes to a

minimum if you can avoid it!

ENable pin