Multifunction Rechargeable Digital Clock

Abhishek Kumar is B.Tech in electronics and instrumentation. His interests include embedded systems, software programming and instrumentation

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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.

Fig. 10: Single-side PCB of LED and USB circuit
Components layout for the PCB in Fig. 10
Fig. 11: Components layout for the PCB in Fig. 10

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.

PCB layout of main clock controller circuit
Fig. 12: PCB layout of main clock controller circuit
Fig. 13: Components layout for the PCB in Fig. 12

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.

Fig. 14: PCB layout of 7-segment display unit (Fig. 6)
Fig. 15: Components layout for the PCB in Fig. 14

Download PCB and component layout PDFs: click here


 

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