Category

Blog

Category

KiCad 8 just dropped. Here’s an AddOhms video covering eight must-try features! The February 2024 release brings a whole host of new stuff to the Schematic editor. However, the PCB editor, CLI, and Simulation tools also received attention. (There are something like 900 closed issues for the 8.0.0 Milestone!) Which of these is your favorite? https://www.youtube.com/watch?v=Ohxlmy0p7FE In the video, I cover: Property Manager Panel (is now everywhere) A fix for Symbol pin or wire end…

USB-Based instruments that do not appear to the host as a virtual com port (VCP) usually use libusb for communication. The pyvisa-py driver for pyvisa can communicate with these instruments. However, you must first create a udev rule (and possibly a user group.) If you see the device in lsusb, but not the pyvisa ResourceManager, you need to add (or modify a udev rule): # backup 99-com.rules (if it exists) cp /etc/udev/rules.d/99-com.rules /etc/udev/rules.d/99-com.rules.BAK # (create…

In August 2022, Nordic Semiconductor announced its first Wi-Fi product. The nRF7002 is a dual-band (2.4 and 5 GHz) Wi-Fi 6 compatible companion IC. It does not have a general-purpose microcontroller built-in. Instead, Nordic intends for you to combine it with another microcontroller, like one of their nRF52 or nRF53-series system on chip (SoC). https://youtu.be/U3aBK9OM1OQ Nordic and the element14 Community sent me an nRF7002 Development Kit (DK), Evaluation Kit (EK), and some nRF7002 QFNs. I…

During the component shortage, I got to know Raspberry Pi’s RP2040 microcontroller. It is a dual-core Arm Cortex-M0+ with about 262 kilobytes of RAM. The feature I like most is the programmable IO pins. These are small state machines that run independently of the Arm cores. They allow for some clever tricks. For example, I used them extensively on the Mega IIe project. This video was supposed to be a project I thought of during…

Most of these pictures from the Mega IIe project did not make it into a video or talk. There were many “behind the scenes” style shots. Some of the pictures have titles and descriptions. I work on them when I have free time. Let me know your favorite! https://www.flickr.com/photos/cmiyc/albums/72177720312911955/ Mega IIe Album on Flickr Navigate one picture at a time with the left/right arrows, or follow the link below to see the full album. View…