ARDUINO RPI-1031 4 Direction Sensor User Manual

ARDUINO RPI-1031 4 Direction Sensor

Operating Principle

1. Based on optics principles.its interior has LED for 1 pc,photosensitive receiving triode for 2pcs;and the other side has one cylindrical shade;just as the picture shows:
   
   Circuit Diagram
   

2. By cylindrical shade to keep out the LED,and photosensitive receiving tube is for detecting RPl-1031 current state.
   

3. When RPl-1031 rotates to the state shown as below,LED is shadowed by the shade;and two photosensitive receiving triodes cannot receive the light;they will be in off state.output low level;two GPIO ports both output low level.
   

4. When RPl-1031 rotates to the state shown as below,one of the photosensitive triode was shadowed,the light emitted by LED only can be received by the other one;that means above photosensitive triode is on,and photosensitive triode under side is off;then two GPIO ports output respectively output high level and low level.
   

5. When RPl-1031 rotates to the state shown as below,the shade does not shadow the diode will shine,two photosensitive triodes can receive the light;then all of them will be on.both of two GPIO ports output high level.
   

6. When RPl-1031 rotates to the state shown as below.this state is adverse to description 4 two GPIO ports output level will be inter cahnged.

Figure 2: Sample connections.

Sample Codes

I
e-Gizmo RPl-1031 Angle sensor 4 Direction sensor
This is a sample sketch for Tilt direction sensor to display the sensor output positions.
For the RPl-1031 – http://www.sparkfun.com/products/10621
Modified by e-Gizmo Mechatronix Central
http://www.e-gizmo.com
July 18,2017
`I #define TILT S1 4 #define TILTS2 5 #define LED TOP 8 #define LED RIGHT 9 #define LED BOTTOM 10 #define LED_LEFT 11 void setup{){ } Serial.begin(9600); pinMode(TILT_S1, INPUT); pinMode(TILT_S2, INPUT); pinMode(LED TOP, OUTPUT); pinMode(LED RIGHT, OUTPUT); pinMode(LED_BOTTOM, OUTPUT); pinMode(LEDLEFT, OUTPUT); void loop{){ int position = GET TILT POSITION(); Serial.println(position); //TOP if(position == 0) { } digitalWrite(LED_TOP, HIGH); digitalWrite(LED_RIGHT, LOW); digitalWrite(LED BOTTOM, LOW); digitalWrite(LED LEFT, LOW); //RIGHT if(position == 2) { digitalWrite(LED TOP, LOW); digitalWrite(LED_RIGHT, HIGH); digitalWrite(LED BOTTOM, LOW); digitalWrite(LEDLEFT, LOW); void loop{){ int position = GET TILT POSITION(); Serial.println(position); //TOP if(position == 0) { } digitalWrite(LED_TOP, HIGH); digitalWrite(LED_RIGHT, LOW); digitalWrite(LED BOTTOM, LOW); digitalWrite(LED LEFT, LOW); //RIGHT if(position == 2) { digitalWrite(LED TOP, LOW); digitalWrite(LED_RIGHT, HIGH); digitalWrite(LED BOTTOM, LOW); digitalWrite(LED_LEFT, LOW); } //LEFT if(position == 1) { } digitalWrite(LED TOP, LOW); digitalWrite(LED_RIGHT, LOW); digitalWrite(LED BOTTOM, LOW); digitalWrite(LED_LEFT, HIGH); //BOTTOM if(position == 3) { } digitalWrite(LED TOP, LOW); digitalWrite(LED RIGHT, LOW); digitalWrite(LED_BOTTOM, HIGH); digitalWrite(LED LEFT, LOW); delay(200); //DELAY } int GET_TILT_POSITION(){ int S1 = digitalRead(TILT_S1); int S2 = digitalRead(TILT _S2); return (S1 << 1) I S2; //BITWISE MATH }`

Figure 3: Serial print output from pH sensor.

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