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5 Software Implementation on PC

The Visible Breadboard Software, which runs on the PC, has several utilities for the Visible Breadboard Device. This section describes the Voltage visualization on the PC and Copy the data from device functions.

5.1 Voltage Visualization on PC

The Visible Breadboard Software has a voltage visualization feature (Fig. 9). When the Visible Breadboard Device is connected to a PC via a USB cable, data from the AD Converter are sent to the PC. The software captures the voltage data of the 36 holes on the Visible Breadboard Device and shows them as a 3D bar graph. The colors on the bar graph change corresponding to the color settings of the Visible Breadboard Devices voltage visualization.

Fig. 9. Voltage visualization on PC. Also user can share the circuit built with this device via internet.

5.2 Circuit Share

The Visible Breadboard Software can capture all the data (connection data of holes, visualization data, and settings) from the Visible Breadboard Device. This software can import and export these data as files. It enables users to copy and share the actual physical circuit via internet or email.

6 Evaluation

6.1 Experimental Design and Participants

We ran a task-oriented circuit-building test with ten users, nine male and one female, with average age 20.8.

Before starting the test, we explained, for two minutes, how to use an ordinary solderless breadboard and the Visible Breadboard. We let the participants practice for a few minutes on each. Then all participants knew how to use both systems.

For the first test, users made 25 connections on the Visible Breadboard. This was to verify the capacitance sensor and resistance of the participants finger skin.

6.2 Questionare

After the wiring test, there were eight tasks relating to making a circuit. We tested four kinds of circuit ((a), (b), (c), and (d)) and users made these on both the ordinary solderless breadboard and the Visible Breadboard. For (a) and (b), we showed the participants a picture of the correct circuits and the users made the circuits from the picture. In experiments (c) and (d), we showed the participants a schematic. They then made the circuits on both the ordinary solderless breadboard and the Visible Breadboard.

Table 3. Experimental Result of 10 users on wiring task (unit: second)

12

16

14

12

15

10

11

10.8

30

10.9

14.17

74

214

112

71

152

84

53

155

98

51

106.4

50

60

49

29

49

57

23

36

51

24

42.8

102

221

157

129

137

106

89

183

150

45

131.9

30

45

36

35

43

65

22

66

95

57

49.4

115

154

101

39

62

87

26

63

77

55

77.9

37

42

37

26

32

60

15

26

31

85

39.1

81

119

189

94

83

30

32

116

38

51

83.3

37

58

52

49

30

45

27

77

52

63

49

6.3 Results

The results of the user experiments are shown in Table 2. There were ten participants, A to J. It is seen in the average column that for every circuit tested in this experiment, the Visible Breadboard was faster than the ordinary solderless breadboard.

After the wiring experiment, we tested the voltage visualization effect of this device. All of the people who took part in this experiment answered the question: Where is the GND or Vcc?, correctly. It was easy for people to distinguish the Vcc from the GND with the Visible Breadboard.

 
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