PROJECT OVERVIEW
This project introduces a cool digital clock made by combining different electronic parts. We use special circuits like the 74192-decade counters to keep time accurately, show the time on displays using the BCD-to-7-segment display (7447), and manage resources efficiently with multiplexers (74HC154). In addition to these main parts, the clock is smartly designed using logic gates like NAND, AND, and OR gates to perform important logic tasks. This makes the design simple and effective. To make sure the clock works well, we carefully tested it in a simulation for each segment of the clock including the hour, the minutes, and the seconds. This guarantees that the clock will function perfectly.
But this clock does more than just tell time. It has a special feature – a gentle beep every 15 minutes. We achieve this using the 74192-decade counters, and logic gates in a specific way. We also added LED to indicate the beep by lightening up in the absent of the beep. The clock follows a 24-hour format and has an easy-to-use interface. You can set the time easily using a button at the downside of our design, thanks to the multiplexers which made it possible. In simple terms, this digital clock shows how creative electronic design can be. It uses special circuits to create a smart and easy-to-use timekeeping device.
Key Functionalities
- Accuracy: The clock will accurately keep time, ticking once every second with a high degree of precision. This is indicated by>
- User-friendly: A dedicated setting mechanism will allow for easy time adjustments, ensuring the clock displays the correct tim>
- Setting of the time manually
- Power supply
- Beeping every 15 minutes
Additional Components (used in easyeda)
- Resistors
- Capacitor
- LEDs (optional)
- Clock(555 timer)
- Cabling
- Voltage Source
For additional resource
Use this link:
Linkedin Address: www.linkedin.com/in/noah-adasi
Home Address: 1 University Avenue, Berekuso. PMB CT 3,
Cantonments. Accra, Ghana.
SEVEN SEGMENT BASED DIGITAL CLOCK DESIGN
LOGISM CIRCUIT DESIGN
The design was implemented on logism using different logic gates such as the and ,or and not gates. The seven segment dispay and decade counters were also used. The connections were as shown below.The design has three segments, that is, the hour segement, minute segment and seconds segment. Each segment is driven by separate counters each, controlled by several logic gates. The counters output goes to the seven segment display.
The beep circuit was designed to ensure that the clock beep after every 15 minutes. The circuit was achieved using the 7447 counters and seven segment displays.
THE BEEP CIRCUIT COMPONENT
THE TIME SETTING CIRCUIT COMPONENT
EASYEDA DESIGN
The PCB design was designed using EASYEDA. To design the PCB in EASYEDA, several steps were followed. First, a schematic was designed by choosing the needed component such as the 4026 decade counter,voltage source, resistors, and capacitors,clock (NE555 timer), and connecting them as needed. Concerning the schematic, two designs were done, but we used only one for the PCB design and all of them have been shown below. After that, the schematic was converted to PCB as shown below:
THE MAIN SCHEMATIC(1st DESIGN)
OTHER SCHEMATIC(2nd DESIGN)
PCB DESIGN (2D VERSION)
PCB DESIGN (3D VERSION Back & Front)
POWER SUPPLY MATLAB
CONCLUSION
In conclusion, several digital system designs such as using of logic gates, counters,and seven segment display have been proven to be useful in designing real life applications.The design, simulated using logism, was proven to be functioning as expected, and the 15 minute beep is important in signal mechanisms for different applications.