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void setup()
{
// set up output pins (4 to 13) for the led array
for( int a = 4; a < 14; a++ )
pinMode( a, OUTPUT );
// set up mode-switch button on pin 3
pinMode( 3, INPUT );
digitalWrite( 3, HIGH );
// pink LED on
digitalWrite( 13, HIGH );
}
// turn an led on/off
void ledOn( int num, bool on )
{
if( num < 0 || num > 9 ) return;
// convert to pin no.
num += 4;
// pin 4 needs to be inverted (it's driving a PNP)
if( num == 4 ) on = !on;
digitalWrite( num, on? HIGH : LOW );
}
void loop()
{
bool on = true;//digitalRead( 3 )? true : false;
for( int a = 0; a < 9; a++ )
ledOn( a, on );
delay( 1000 );
}
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