Procedure
- I first outfitted the Photoresistors with the ultimate Telescope effect tubey things that David better not undo
- These tubey things were made by putting a red straw on the photoresistor, wrapping it in black construction paper, and taping the whole thing with green electrical tape (black was not available). This telescopey thing is about 4-5 inches long
- I wrote a short program to see the readings of each photoresistor updating every few seconds
- I tested this in two different ambient light situations
Data
| Measurements in Bright Ambient Light at 1/2 inch away from ball
| Right Sensor with Blue Ball
| Right Sensor with Yellow Ball
| Left Sensor with Blue Ball
| Left Sensor with Yellow Ball
|
| Trial 1
| 19
| 143
| 22
| 24
|
| Trial 2
| 22
| 137
| 24
| 29
|
| Trial 3
| 23
| 131
| 23
| 35
|
| Trial 4
| 17
| 115
| 25
| 48
|
| Trial 5
| 29
| 98
| 31
| 52
|
| Trial 6
| 35
| 125
| 32
| 53
|
| Trial 7
| 38
| 117
| 34
| 62
|
| Trial 8
| 42
| 119
| 35
| 45
|
| Trial 9
| 19
| 121
| 10
| 37
|
| Trial 10
| 22
| 118
| 9
| 35
|
| Measurements in Medium Ambient Light at 1/2 inch away from ball
| Right Sensor with Blue Ball
| Right Sensor with Yellow Ball
| Left Sensor with Blue Ball
| Left Sensor with Yellow Ball
|
| Trial 1
| 1
| 7
| 7
| 20
|
| Trial 2
| 2
| 8
| 6
| 21
|
| Trial 3
| 1
| 6
| 5
| 22
|
| Trial 4
| 1
| 7
| 4
| 18
|
| Trial 5
| 1
| 5
| 6
| 21
|
| Trial 6
| 3
| 4
| 5
| 15
|
| Trial 7
| 2
| 7
| 3
| 14
|
| Trial 8
| 1
| 6
| 4
| 15
|
| Trial 9
| 1
| 8
| 5
| 18
|
| Trial 10
| 2
| 7
| 3
| 17
|
IMPORTANT CHART FOR USE IN EGGHUNT
| Measurements the Lab at 1/2 to 1 inch away from ball
| Right Sensor with Blue Ball
| Right Sensor with Yellow Ball
| Left Sensor with Blue Ball
| Left Sensor with Yellow Ball
|
| Trial 1
| 20
| 63
| 46
| 130
|
| Trial 2
| 19
| 76
| 48
| 127
|
| Trial 3
| 18
| 70
| 52
| 126
|
| Trial 4
| 19
| 68
| 40
| 136
|
| Trial 5
| 18
| 78
| 42
| 129
|
| Trial 6
| 24
| 83
| 49
| 135
|
| Trial 7
| 21
| 64
| 46
| 134
|
| Trial 8
| 23
| 65
| 47
| 143
|
| Trial 9
| 22
| 64
| 45
| 141
|
| Trial 10
| 21
| 65
| 44
| 143
|
- The ambient light in the lab room for the Left sensor feel generally in the 70s, 80s, and 90s
- The ambient light in the lab room for the Right sensor feel generally in the 40s, 50s, and 60s
- Christmas tree lights for the Right sensor were between 100 and 130
- David stole the Create before I could test this for the left sensor, this will hopefully happen Tuesday
Conclusions
- The Photoresistor Sensors were clearly able to distinguish between blue and yellow balls
- The Ambient Light did however significantly affect the readings
- Therefore these tests must be run again in the lab room with those specific fluorescent lights
- The Right and Left sensors do come up with different values in the same environment
- The Right Sensor Seems to be a bit more distinctive about distinguishing between the balls
- The Christmas Tree Lights Do have a unique range that will allow C3Po to drive to the lights in order to drive to the goal
- The Photoresistors can distinguish between yellow and blue balls easily but the balls must be very close (.5-1) inch away
