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Nixie clock with DCF and alarm

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Vermes

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The system of the clock was based on microcontroller '51 AT89C51. Source code consists of few hundreds lines of code in Assembler. Lamps are multiplex controlled with a frequency of 1KHz. Decoder BCD/1 of 10 type 74141 and high voltage transistors control the lamps. Displays are powered from a converter on NE555. DCF receiver was made based on U4221B. Functions can be selected by a switch.

Functions:
  • alarm
  • manually set time
  • synchronization DCF 77
  • display time UTC




Link to original thread (useful attachment) – Kolejny zegar Nixie z DCF i budzikiem.
 

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