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===== Oak: 9V Powered Breadboard =====

======= Work in Progress =======

The Oak is packed with a lot of features, including built-in Wifi, in a small package, making it ideal for somewhat remote projects. Projects where you won't always have access to a 110V  / USB power source. That's exactly where a powered breadboard comes in.

===== Components used =====

^ Part       ^ Quantity          ^Identification^
| Oak with soldered headers |1| |
| Breadboard Power Supply Module |1| |
| 9V to Barrel Jack Cable |1| |
| 9V Battery |1| |
| Jumper Wires |2| |

This tutorial is a very simple one, simply powering your Oak for portability. Different breadboard power modules should "Spark" your ingenuity for powering the sensors as well.

===== Concepts =====


Deep Sleep




===== Code =====

=== First Blink Sketch ===

This is the simple code from the First Blink sketch. It's used simply to verify that your Oak is connected and working

<code>
void setup()
{                
  pinMode(1, OUTPUT); //LED on Oak
}

void loop()
{
  digitalWrite(1, HIGH);
  delay(1000);
  digitalWrite(1, LOW);
  delay(1000);
}
</code>

{{http://digistump.com/wiki/_media/oak/tutorials/power_supply_basic.png?300|
http://digistump.com/wiki/_media/oak/tutorials/power_supply_basic.png?600|}}


Let's add / power a sensor as well. For this we'll use the US-100 Ultrasonic, powered via the module, and running the same sketch as in the starter lesson. Refer to that lesson for the sketch details.

=== US-100 Ultrasonic ===

<code>
int trigPin = 2; // Trigger Pin
int echoPin = 4; // Echo Pin
int LEDPin = 1; // Onboard LED
unsigned long Time_Echo_us = 0; 
unsigned long Len_mm  = 0; 
char post_Distance[16];

void setup() {
 pinMode(trigPin, OUTPUT);
 pinMode(echoPin, INPUT);
 pinMode(LEDPin, OUTPUT); // Use LED indicator for visual feedback
 }

void loop() {
 digitalWrite(trigPin, LOW); 
 delay(100); 
 digitalWrite(trigPin, HIGH);
 delay(10); 
 digitalWrite(trigPin, LOW);
 Time_Echo_us = pulseIn(echoPin, HIGH);  
 Len_mm = (Time_Echo_us*34/100)/2;
 sprintf(post_Distance, "%04d", Len_mm);
 Particle.publish("distance in mm:", post_Distance);
               
 if((Len_mm < 3000) && (Len_mm > 1)) {   // Length effective range (1, 3000).
 
 digitalWrite(LEDPin, HIGH); 
 }
 else { 
 digitalWrite(LEDPin, LOW); 
 }                           
 delay(1000);                                
 
}
</code>
}

{{http://digistump.com/wiki/_media/oak/tutorials/power_supply_sensor.png?300|
http://digistump.com/wiki/_media/oak/tutorials/power_supply_sensor.png?600|}}

===== Conclusion =====
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