PROGRESS 14: WALL (BOX) OF SENSOR MODULE

Before I start to interface the sensor with Arduino, I need to ensure that there are no light interference from the outside other than the light that only will be reflected by the colour paper. The sensor only need to sense the colour of the light of colour paper to get a precise value or result. 

In order to gain the precise result, I have made a box for the sensor module. This box will prevent the outside light from interfere the sensor to sense the exact colour of the colour paper. The height of this wall is 1.8cm.

PROGRESS 13: SENSOR TESTING 3

In order to get frequency same as the frequency average in the Sensor Testing 2, I need to reconstruct the wall of the sensor. After several testing, the suitable wall to get approximately same as the frequency average is 0.65 cm height compared to 0.7 cm height in the Sensor Testing 2. The result are as below:

RED

Figure 13.1: Frequency = 12.48 kHz

BLUE

Figure 13.2: Frequency = 15.34 kHz

GREEN

Figure 13.3: Frequency = 9.54 kHz

Colour	Frequency Average (kHz) – 0.7cm wall	Frequency (kHz) – 0.65cm wall
Red	12	12.48
Blue	15	15.34
Green	9	9.54

Colour

Frequency Average (kHz) – 0.7cm wall

Frequency (kHz) – 0.65cm wall

Red

12

12.48

Blue

15

15.34

Green

9

9.54

PROGRESS 12: SENSOR TESTING 2

SENSOR TESTING BY USING OSCILLOSCOPE

Same as testing by using multimeter, the sensor tested by using oscilloscope to get the frequency (kHz) with 100% output frequency scaling (fo).

Before performing the test, the sensor had been covered by a wall with 0.7 cm height. The wall functioning to prevent the light from LED's to be directed towards the sensor. In other word, the sensor will only detect the reflection of light from colour paper. The frequency range and frequency average was determined. The frequency range determined by the position of the paper colour (closest and far of the sensor).

Figure 12.1: Sensor Covered with 0.7 cm height.

RED

Figure 12.2: Red Colour Paper

Figure 12.3: Min Frequency = 7.021 kHz

Figure 12.4: Max Frequency = 17.12 kHz

S0	S1	S2	S3	Frequency Range (kHz)	Frequency Average (kHz)
H	H	L	L	7 – 17	12

Table 12.1: Result for Red Colour Paper

BLUE

Figure 12.5: Blue Colour Paper

Figure 12.6: Min Frequency = 8.300 kHz

Figure 12.7: Max Frequency = 22.32 kHz

S0	S1	S2	S3	Frequency Range (kHz)	Frequency Average (kHz)
H	H	L	H	8 – 22	15

Table 12.2: Result for Blue Colour Paper

GREEN

Figure 12.8: Green Colour Paper


Figure 12.9: Min Frequency = 5.051 kHz

Figure 12.10: Max Frequency = 12.99 kHz

S0	S1	S2	S3	Frequency Range (kHz)	Frequency Average (kHz)
H	H	H	H	5 – 13	9

Table 12.3: Result for Green Colour Paper

S0

S1

S2

S3

Frequency Range (kHz)

Frequency Average (kHz)

H

H

L

L

7 – 17

12

S0

S1

S2

S3

Frequency Range (kHz)

Frequency Average (kHz)

H

H

L

H

8 – 22

15

S0

S1

S2

S3

Frequency Range (kHz)

Frequency Average (kHz)

H

H

H

H

5 – 13

9

PROGRESS 11: SENSOR TESTING 1

SENSOR TESTING BY USING MULTIMETER

Based on selectable option given in datasheet, a sensor testing was made with three different colour; Red, Blue and Green. The values recorded are in frequency (kHz).

RED

Figure 11.1: Red Colour Paper

S0	S1	S2	S3	Value (kHz)
L	L	L	L	0
L	H	L	L	1.533
H	L	L	L	15.720
H	H	L	L	73.500

BLUE

Figure 11.2: Blue Colour Paper

S0	S1	S2	S3	Value (kHz)
L	L	L	L	0
L	H	L	L	1.727
H	L	L	L	17.290
H	H	L	L	86.600

GREEN

Figure 11.3: Green Colour Paper

S0	S1	S2	S3	Value (kHz)
L	L	L	L	0
L	H	L	L	1.056
H	L	L	L	10.550
H	H	L	L	52.800