A radio clock or radio-controlled clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. You can design your own radio-controlled clock using DCF77 atomic clock. To know about DCF77, it is strongly recommended to visit the official DCF77 web site:
http://www.dcf77.com/ (German language)
it contains all that you have to know about DCF77. You can also try a Google search on DCF77 and select the most appropriate result for your convenience.
Additional materials that can be used in building a radio-controlled LED clock includes:
- PIC16F84 microcontroller
- 4 x 7 segments LED display
- Hours and minutes, or minutes and seconds are displayed, with a control button
- EasyPIC development circuit board.
The equivalent circuit schematic can be obtained here, and the C language source code is freely obtained by clicking on the link DCF77 LED CLOCK C SOURCE CODE : just copy and paste it in the MikroC compiler.