4.2.2 Poll Tree Light Design 4.2.2.1 Components Specifications As stated before, the components’ list will only include the major components for the circuit. Unlike most other circuits, more resistors will be used in the poll tree light. One resistor will be placed before each LED light. In addition, the microprocessor CC2540 will be shared between all other circuits in the finish gate. Input Output Component Voltage (V) Current (A) Voltage (V) Current (A) CC2540 2.0 3.6 24 * 10-3 2.0 V 3.6 V 4 * 10-3 – – TLC59281 3.0 5.5 1 * 10-6 3.0 5.5 40 * 10-3 – – Green LED Light 1.8 2.1 20 * 10-3 - - – Red LED 1.9 2.1 20 * 10-3 - - – Yellow LED Light 1.9 2.1 20 * 10-3 - - – Table 10 Components’ Power Specifications Table 11 shows the pins’ details for each component. This table only shows the pins used for each component for this part of the finish gate. Component Pin # Detail P0_0 SIN - Data Line P0_1 SCLK CC2540 P0_2 Latch P0_3 Sout P0_4 Blank P1 GND P2 Sin Data Line – P3 S P4 Latch TLC59281 P (5,6,7,8) Output P21 Blank P22 Sout P23 IREF P24 Vcc 11 Components’ Output Pins Used
4.2.2 Poll Tree Light Design 4.2.2.1 Components Specifications As stated before, the components’ list will only include the major components for the circuit. Unlike most other circuits, more resistors will be used in the poll tree light. One resistor will be placed before each LED light. In addition, the microprocessor CC2540 will be shared between all other circuits in the finish gate. Component Input Output Voltage (V) Current (A) Voltage (V) Current (A) CC2540 2.0 – 3.6 24 * 10-3 2.0 V – 3.6 V 4 * 10-3 TLC59281 3.0 – 5.5 1 * 10-6 3.0 – 5.5 40 * 10-3 Green LED Light 1.8 – 2.1 20 * 10-3 - - Red LED 1.9 – 2.1 20 * 10-3 - - Yellow LED Light 1.9 – 2.1 20 * 10-3 - - Table 10 Components’ Power Specifications Table 11 shows the pins’ details for each component. This table only shows the pins used for each component for this part of the finish gate. Component Pin # Detail CC2540 P0_0 SIN - Data Line P0_1 SCLK P0_2 Latch P0_3 Sout P0_4 Blank TLC59281 P1 GND P2 Sin – Data Line P3 S P4 Latch P (5,6,7,8) Output P21 Blank P22 Sout P23 IREF P24 Vcc 11 Components’ Output Pins Used
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