Power over ethernet nixie clock with NTP synchronization
This is an ATMEGA328 based nixie clock. It supports power over ethernet (802.3af compliant), and sychronizes the time over NTP.
Features: ATMEGA328 8 bit MCU ENC28J60 based 10Mbit ethernet LM5070 isolated flyback supply (48V in, 5v & 200V output) HV5812 HV shift registers to drive the nixies IN-12 nixie tubes Piezo beeper for alarm RTC with backup battery in case internet goes down forever CP2102 USB to serial converter for debugging (or whatever...) SPDT relay, for driving a horn or bell
Preliminary code is complete and unit is functional. The code is a
modification of the tuxgraphics NTP LCD
Being fairly new to SMPS design, I'm afraid the tiny EP13 transformer core is getting too hot. I might try to retrofit a slightly larger core.
To do: code for alarm setting (both via http and buttons on the clock), general polishing.
Software will be posted once complete.
Documentation on this item is currently incomplete. Email for now if you have any questions.