Do you have a J-Link compact and wonder why it only works with _some_ USB-C cables? I looked into why that is 🤬

alvarop.com/2025/09/j-li...

Spent waaaaay too long trying to figure out why my board's SPI bus on GP6-GP9 wasn't working 🤦‍♂️

Have you ever wanted to debug your device over USB-C?
(I’m talking JTAG/SWD, not just USB!) If you already have a USB-C connector, there’s no need to have an additional connector to program!
Started as a twitter thread ages ago, but I've cleaned it up and added more info!
alvarop.com/2025/03/swd-...

This is one of the neatest gifts I’ve ever received. It’s a rug that looks just like one of my weather station PCB’s!

Here are pictures of the PCB and the rug. Oh, and did I mention some of it glows in the dark?!?!?

Slowly migrating old Twitter threads to my blog. Here's one on a 7400 series clock I built based on my dad's college project notes.

alvarop.com/2024/12/7400...

I’ll be at #opensauce all weekend. Stop by and say hello if you’re around! (Or if you need something fixed!)

Here’s one on the train in SF!
Really enjoying it so far :D