MakerNTP - A Low Cost Arduino Mega2560 GPS-based Stratum 1 NTP Server

My homebrew low locst (not more than 120 USD for retail) MakerNTP is now in operation for about one month without any problem in my home environment. The features of MakerNTP are:

Protocol: SNTP V4
Performance: 40 requests/second
Ethernet Port: 1
Default IP: 192.168.1.123
Power Supply: 9V (recommended) / 5V (USB)
Enclosure: ABS
Application: home automation, security surveillance ......

NOTE: Most SNTP clients will generally sync your system time to within 100 milliseconds of the correct time - often within 10 milliseconds. Of course, the accuracy is highly dependent on the accuracy of the server that it is connecting to.

Photos