An actual-size PCB layout of the power LED and USB charging circuit (in Fig. 4) is shown in Fig. 10 and its components layout in Fig. 11. After assembling the circuit on the PCB, connect CON6 to CON3 in Fig. 3, and CON7 to CON4 in Fig. 3. Use CON8 for mobile charging through the USB cable. Affix all the LEDs (LED2 through LED7) on the top or front side of the cabinet.
An actual-size PCB layout for the main clock controller circuit (in Fig. 5) is shown in Fig. 12 and its components layout in Fig. 13. After assembling the circuit on the PCB, connect CON9 to 5.2V from CON5 in Fig. 3. Connect the RGB1 LED and switches S1 through S6 on the front side of the cabinet.
An actual-size PCB layout of the 7-segment display unit (Fig. 6) is shown in Fig. 14 and its components layout in Fig. 15. After assembling the circuit on the PCB, connect CON14 to CON10, CON16 to CON13, and CON15 to CON11 from Fig. 5. Affix LED8 and LED9 on the PCB for seconds indication.
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