PoE-PD Hat For Raspberry Pi 4B
I haven’t updated my blog recently because I’ve been quite busy working on a DC-DC converter circuit board for my...
October 6, 2025
KookSay
We are the code we write
Latest
Project Progress Update: 1×2 Audio Switcher
Today, I completed the initial design of the enclosure for the 1×2 audio switcher. Although this “enclosure” isn’t yet a...
July 10, 2025
Replacing the Inductor Type to Facilitate Hand Soldering
Today, I replaced the original 4x4mm surface-mount inductor I had been using with a 1210-sized surface-mount inductor. Although both inductors...
July 8, 2025
It’s Time to Design the Enclosure and the Panel
Over the past period, I’ve been focusing on the development of the 1×2 audio switcher. After continuous design, adjustments, fabrication,...
July 4, 2025
Profile
BI1XLR
I’m a programmer with a passion for electronic circuit design and amateur radio in my spare time. This blog will document some of my recent small circuit projects related to amateur radio, along with the challenges I encounter and the thoughts I have during the development process. Through this blog, I hope to summarize what I’ve learned, improve my English skills, make new friends, and share the joy of building and experimenting. If possible, I also hope to connect with more fellow amateur radio enthusiasts and exchange QSL cards.
73 and thanks for stopping by!