New Firmware v2.0 Now includes "MasterPulse" mode to periodically step or sync electromechanical clocks (external driver interface required).

The Chronvertor is a module containing a very accurate battery backed Maxim DS3231 RTC (Real Time Clock) chip working with a Microchip PIC Microcontroller to output the time and date as either a GPS NMEA datagram or a WWVB, DCF77, MSF or JJY radio time protocol.

It automatically takes care of DST (Daylight Saving Time) changes around the world and provides for time-zone offsets to generate any local time.

The RTC time and date can be initially set-up by either connecting it to a GPS module for a few seconds or by serial commands sent by a PC terminal program.

Two 3-pin sockets with crimp pins are also supplied so that you can easily attach your own wires.

Features

Simulates any one of the following serial time protocols:

1. GPS NMEA Time datagram ($GPRMC)
2. WWVB (USA) Radio time protocol.
3. MSF (UK) Radio time protocol.
4. DCF77 (Germany) Radio time protocol.
5. JJY (Japan) Radio time protocol.

- Carrier wave (60,77.5 and 40kHz)  generation options for radio protocols.
- Automatic DST (Daylight Saving Time) adjustment for most countries and custom rules.
- World Time Zone offset settings allow any local time to be generated
- Automatic Leap Year adjustment
- The module automatically outputs the correct weekday code for radio time protocols
    - "MasterPulse" mode provides periodic pulses to step or sync electromechanical clocks
- Very accurate timekeeping. (within  ± 5.4 seconds per month or better).
- Timekeeping fine adjustment can improve accuracy and compensate for crystal "aging"
- Tested and calibrated to improve on the published RTC timekeeping accuracy
- Time is battery-backed with a long life lithium CR2032 coin-cell.

- Can be very accurately set by syncing it with an external GPS  ($GPRMC)
- Time/date can also be set by serial commands from a PC terminal.
- Small size with low power consumption.
- Could be used for testing or synchronising radio controlled clocks/watches.
- All configuration settings are safely stored in the microcontrollers' EEPROM memory.
- Configuration settings can be reset back to factory defaults if you wish.

Power supply requirements:

5 Volts DC maximum (Regulated) for the module.

3 Volts lithium coin cell (CR2032)  for the RTC timekeeping battery backup. (The CR2032 lithium battery is not supplied with the module due to current postal restrictions.)

Main Power consumption:

4mA (with LED flashing) 3mA (LED off)

Backup timekeeping battery power consumption:

0.85µA (Estimated run-time >10 years (or the shelf life of the CR2032 battery))

Dimensions:

PCB only - 33mm X 27.5mm X 1.6mm (1.3” X 1.1” X 0.06”) (PCB has rounded corners)

Height approx 20mm (0.79”) including battery holder

Timekeeping Accuracy:

Unadjusted RTC accuracy ±2ppm from 0°C to +40°C. (about ± 5.4 seconds per month) (accuracy can be improved further by fine tuning settings stored in EEPROM memory).

Crystal Aging:

First year: ±1ppm 0-10 Years ±5ppm (Manufacturer's estimate)

Weight:

Approx 11 Grams (0.4 oz)

Download the user manual