EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Sep 5·5 min read
Rebuilding a 1995 GPS Time Server so I don't get Telstra'd
TL;DR
A 1995 TrueTime XL-AK GPS time server was modernized using a Raspberry Pi 5 and GNSS HAT to create a stratum 1 NTP time server, enhancing timekeeping stability.
✦ Why It Matters
Consider upgrading legacy systems with modern components for improved performance and reliability.
Key Takeaways
- Use a Raspberry Pi for modernizing legacy time servers.
- Implement Chrony for precise time synchronization.
- Optimize thermal conditions for stable clock performance.
- Explore wire wrapping for low-profile connections.
How It Works
The Raspberry Pi acts as a stratum 1 NTP server by receiving GPS time data through the GNSS HAT, which is then processed by Chrony for synchronization. The configuration includes precise timing features like PPS (Pulse Per Second) to enhance accuracy.
By isolating CPU interrupts and maintaining a stable thermal environment, the system minimizes clock drift, ensuring reliable timekeeping.