Hi,Years ago this forum helped me put together my first GPSDO and NTP server.
Using a then-popular INTEL ATOM board, FreeBSD w/ the NTP kernel, 1PPS input
from aTB, works great. But as the years go by, HW improves/evolves and it might
be time to recreate this functionin some other modern HW.
Looking for a platform not needing a fan. While the ATOM and SSD seem to be OK
w/o direct airflow, the Mini ITX Power Supply fan is needed.
After three years, the stupid sleeve bearings are beginning to
rattle........which led me to this design review.
Recently built a Caching DNS for the home LAN using a "Technologic Systems
TS-7250-V2, general purpose PC/104 embedded system " Runs Debian, 3.14 kernel.
Hardware Description:800 MHz CPU (PXA166)512 MB RAMMicro SD card socketRTC with
battery and temp compensationTemp Sensor10/100 ethernet port2 USB HS Host
ports3x RS-232 serial ports3x TTL serial portsRS-485 portPC/104 connectorUSB
device console port (Micro B connector)LCD and DIO Headers75 TTL DIO (including
PC/104 conn)5VDC or 8-28VDC power inputA/D converter, 5 channels (with 4-20 mA
current loop)
A more expensive alternative to the Pi, but reasonable.
Wondering if a TS-7250-V2 is worth a try for the NTP function, or if anyone
here has already used one of thesefor NTP?
Or other non-Pi alternatives? I would very much appreciate some guidance as to
the HW/SW combinationthat would best replace the existing NTP server.
- 1PPS is available from both a Trimble TB and a Jackson Labs Fury, so I could
build a parallel system.
Or just put a ball-bearing fan in...........73Frank HughesKJ4OLL
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