Clocks
Sanjoy
I have done some quick research on this and come up with the following:
1. All RTC chips that I can find would require come sort of processor interface to set and read the clock information from the chip using a suitable protocol such as I2C.
2. You could use a receiver module and obtain the time from a 'local' atomic time transmitter. However a quick search this morning did not show any such transmitters in India - but there may be one, I don't know.
Edit: Just found this:
The Time and Frequency Standards Laboratory is a part of the National Physical Laboratory in New Delhi which maintains and calibrates the Indian Standard Time.
Features of the Time and Frequency Standards Lab include:
* Four caesium and rubidium atomic clocks
* HF broadcast service operating at 10 MHz under call sign ATA to synchronise the user clock within a millisecond.
* INSAT satellite-based standard time and frequency broadcast service which offers IST correct to ±10 microsecond and frequency calibration up to ±10-10.
* Time and frequency calibrations are made with the help of pico- and nano-seconds time interval, frequency counters, and phase recorders.
3. You could receive the time from either the GPS or Indian Satellite systems.
However with all these solutions wou would need a microprocessor (or a serious amount of discrete IC's) to allow you to decode the signals received.
Sorry I can't be af any more help and good news
PS. Just found some Information from the
**broken link removed**