Fixing the USB microphone mute button click

In my previous article I documented the design and build process of my USB microphone based around an STM32F446 MCU. If you haven’t already read it then it’s probably worth catching up now before reading the rest of this article so that you have the necessary context. The...

A USB microphone for online meetings

Here in the UK the new reality of working in the IT business over the past year has been that we’re all at home working remotely over virtual desktop connections and for someone engaged in software development this is a setup that works well. Having to commute 90 minutes each way into...

Modding the STM32 F4 Discovery with a 25MHz clock

In this article I’m going to show you how to do a straightforward modification to the STM32 F4 Discovery board that will change the onboard oscillator from 8MHz to 25MHz. Why do this Probably the main reason to do this is ethernet. If you’re prototyping an MII ethernet PHY then...