Testing the PDM to SPL arithmetic
Since porting the PDM microphone SPL measurement code base from the ATTiny85 to the ARM based LPC8xx family, it would …
Category Archives: Articles
An RTOS for an 8-pin ARM CPU
While researching another post recently, I tripped over an impressively small RTOS (real time operating system) that can be built …
PDM in another 8-pin CPU
This post explores interfacing a PDM microphone with an NXP LPC810 ARM CORTEX-M0 microprocessor, taking advantage of its existing peripherals …
SPL is Logarithmic
In this post, we discuss why we represent SPL on a logarithmic scale, why you should care, and how we …
PDM in ATTiny85 Source Code
This is part of a series of articles on the general subject of audio signal processing from air to information. …
Resolution of audio recovered from a PDM data stream
This is part of a series of articles on the general subject of audio signal processing from air to information. …
PDM in a Tiny CPU
This is part of a series of articles on the general subject of audio signal processing from air to information. …
Headless Raspberry Pi with WiFi
Ross has joined the ranks of Pi owners, to provide computing for a (personal) cat-friendly art project destined for his …
Trick: Upload media to a WP blog’s media library with Lua
This is an article in a series of unknown length discussing a collection of tools written in Lua to publish …
Trick: List posts from a WP blog with Lua
This is an article in a series of unknown length discussing a tool written in Lua to publish posts on …
Words from Cheshire Engineering Corp. 