I’m following the instructions here and here to try and make a Stratum-1 NTP server using GPS and a Raspberry Pi 2. If this works, I should have a very accurate NTP server for a very reasonable amount of money.
I ordered the Raspberry Pi 2 from Amazon, and the other parts from HAB Supplies in the UK. The total cost (prices include tax) was:
| Raspberry Pi 2 | £29.99 |
|---|---|
| GPS expansion board | £35.99 |
| Antenna and cable | £41.99 |
| Postage | £5.52 |
| Total | £113.49 |
Edit: I already had a spare 32GB SD card and power supply. If you don’t have those already, you’d need to buy them too.
Richard WM Jones 