Top all-time · #11652
Andrew's Lab
Personal blog · serd.eshardwaresystems
Andrew's Lab is a personal blog at serd.es about hardware and systems. Since 2024, 6 different Hacker News readers have linked it 9 times. It is still writing: the last post was on 2026-03-06, and you can follow it by feed.
Too few sampled comments (2) to say how often HN recommends it.?
Why HN links it
HN readers link serd.es for hardware engineering write-ups, such as an open hardware Ethernet switch project and a 48V-to-12V intermediate bus converter the author designed and characterized.
Summarised by Claude from a sample of 2 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
The overall system will be powered by 48V DC on a 6-pin Molex Mini-Fit Jr connector, then stepped down to 12V by a 48->12V intermediate bus converter I've previously designed and characterized ( https://serd.es/2024/10/15/Intermediate-bus-converter.html ) The 24-port line card has a 15W TDP overall (6.75W datasheet worst-case power consumption for each of the two 12-port PHYs, plus 1.5W added for power supply conver…
Comment linking /2024/10/15/Intermediate-bus-converter.html
on “Open Hardware Ethernet Switch project, part 1”Submitted Open Hardware Ethernet Switch project, part 1 as a story · 275 points
HN discussionThere are no blobs I'm aware of anywhere that are actually running in the system. The STM32s have a small boot "ROM" burned into a write-protected region of flash but I have it jumpered so I boot from main user flash, not the bootloader. I did a quick silicon overview of them (just out of curiosity... they came new from Digikey so I have no reason to believe they're fishy). STM32H735: top metal only https://siliconp…
Comment linking /2025/01/02/STM32L431-teardown.html
on “Open Hardware Ethernet Switch project, part 1”Submitted What Microchip doesn't (officially) tell you about the VSC8512 as a story · 168 points
HN discussionSubmitted Memory Mapping an FPGA from an STM32 as a story · 157 points
HN discussionSubmitted Trigger Crossbar as a story · 89 points
HN discussionSubmitted Open source Ethernet switch – part 2 as a story · 20 points
HN discussionSubmitted TCXO Failure Analysis as a story · 1 points
HN discussionSubmitted Terminal Pacifism as a story · 1 points
HN discussion