All High

By now we have investigated what happens if we set all pins to high Z, pull up or low. We conclude the basic sketches by setting all pins to high.

//
//	www.blinkenlight.net
//
//	Copyright 2011 Udo Klein
//
//	This program is free software: you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation, either version 3 of the License, or
//	(at your option) any later version.
//
//	This program is distributed in the hope that it will be useful,
//	but WITHOUT ANY WARRANTY; without even the implied warranty of
//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//	GNU General Public License for more details.
//
//	You should have received a copy of the GNU General Public License
//	along with this program. If not, see http://www.gnu.org/licenses/


// This sketch will set all outputs to low.

void setup() {
	for (uint8_t pin=0; pin<20; ++pin) {
		pinMode(pin, OUTPUT);
		digitalWrite(pin, HIGH);
	}
}

void loop() { }

All LEDs light up. Bright!

Blinkenlight Prototype On