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Appendix B: Bill of Materials (BOM)
Table B1. BOM for Components Shown on Schematic: Sensor and Microcontroller Main Board
Part Type
Value
Quantity
Designators
Optical Sensor Device
1
U101
Optical Sensor LED
1
D102
Optical Sensor Lens
1
Not shown on schematic
Optical Sensor Clip
1
Not shown on schematic
Microcontroller
1
U102
DC/DC Converter
1
U103
Z LED
1
D103
Z Encoder
3 PIN
1
U104
Resistor (0805)
100 k
5
R101, R102, R103, R104, R105
Resistor (0805)
3.3M
1
R124
Resistor (0805)
240
1
R125
Resistor (0805)
27K
2
R107, R108
Resistor (0805)
1.1 M
1
R109
Resistor (0805)
1.0 M
1
R110
Resistor (0805)
10
1
R111
Resistor (0805)
0
1
R106
Resistor (0805)
No Load
1
R122
Ceremic capacitor (0603)
.01UF 50V
4
C101, C106, C108, C110
Ceremic capacitor (0603)
.1UF 25V
2
C102, C112
Tantalum capacitor
1 uF 50V
3
C105, C107, C109
Tantalum capacitor
10uF 25V
2
C103, C104
NPN T RANSISTOR
MMBT3906LT1
1
Q101
Switch
SPDT
3
SW101, SW102, SW103
Switch, light touch
1
SW104
Inductor
10 uH
1
L101
Crystal
32.768 kHz
1
XTAL101
Header, pins 2mm
2x5
2
J101
Header, socket, 2mm
2 x 7
2
J105
Battery Spring, common
2X7
1
T101
Battery
1
T102
Battery spring -
1
T103
