Saturday, May 29, 2010

Arduino based Network NTP Clock (Update1)

More progress, Added a Sure Electronics 0832 Green Matrix LED Display for continuous time display.  Crappy video posted to youtube,

Code almost done, still some tweaking needed.  Enclosure is next.

Wednesday, May 5, 2010

Arduino based Network NTP Clock

Ethernet, DHCP, IP, NTP, and all under 16k.   Sets software RTC in sync to an NTP server.  Displays time in seconds since 1970 (ala UNIX), 24hr format, Day of week, and full date.  Red LED 7-Segment displays using 74HC595 shift registers.


Monday, May 3, 2010

7-Segment LED Shift Register detail

While building another 7-Segment LED display for a project I took some photos.  I've been asked by some for more detail on how those things are build and chained together.  This is the same style display I used in the Game of Life display from an earlier post.   These modules are assembled each with a 74HC595 shift register glued to the back "dead bug" style.  Each segment is driven by a output bit thru a resistor.   It makes for a very simple static (no scanning or multiplexing) display and very simply programming in the microprocessor.   I really have to make a circuit board for this!  Displays by the inch anyone?

Full Photo Album: