Studying a clock is one factor; actually figuring out the time is kind of one other. For on a regular basis timekeeping wants, we use a typical referred to as Coordinated Common Time, or UTC, which is derived from Worldwide Atomic Time, a consensus of greater than 200 clocks that maintain exact time primarily based on the motion of electrons.
Utilizing a receiver module, you’ll be able to construct a clock that picks up one of many U.S. UTC radio broadcasts, known as WWVB. A microcontroller decodes the WWVB time sign that the receiver pulls in, whereas a separate real-time clock module (an everyday microchip-and-crystal-based timekeeping mechanism) retains the clock operating like a traditional clock. When a brand new time sign has been obtained that differs from the clock’s present time, the microcontroller updates the clock. The sign will are available in higher at night time and when atmospheric circumstances are finest for long-range radio reception. When it does are available in, the mission offers you the perfect time you’ve ever had.
Construct an Atomic Clock
Time: 2 Hours
Price: About $80
- Purchase or construct a clock enclosure.
- Comply with the schematic right here to construct the circuitry, and fix the real-time clock and WWVB modules to the auxiliary circuit board. Join results in the Arduino pins as you go.
- Wire the connections between the Arduino and the show. We used a 16-character, two-line LCD.
- Obtain the software program and program the Arduino.
- Set the dip switches to point your time zone.
- Hearth up the circuit. When the receiver pulls within the WWVB sign (which can take till dusk in noisy radio-frequency environments removed from its origin in Colorado), the show will replace to the right time and point out that the adjustment has been made. The front-panel gentle will blink in time with every pulse obtained and decoded, as soon as per second when all is working correctly.