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The Voyage to Smart Home Automation

Should you add stuffing in a Subwoofer

Should you add stuffing in a Subwoofer

I just built a pair of woofer enclosures and when they were finished the question was whether or not to add some wall treatment or…
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Mark Zachmann
May 15, 2024
A Cheap Electronically Controllable DC Supply

A Cheap Electronically Controllable DC Supply

This story describes how to convert a manually set DC supply to one you can set remotely or by computer.
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Mark Zachmann
Mar 10, 2024
How to run CamillaDSP with Multiple DACs

How to run CamillaDSP with Multiple DACs

I use two 4-channel DACs working together with CamillaDSP to provide 6 active speaker channels. Here’s what I do to get it working in…
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Mark Zachmann
Jan 26, 2024
Add a Silent Fan to your Raspberry Pi 4

Add a Silent Fan to your Raspberry Pi 4

I’ve been trying to move from a Mac Mini to a Raspberry Pi for my living room audio for a year and finally was able to get a Pi 4B retail…
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Mark Zachmann
Aug 27, 2023
Comparing the Dayton Audio DSP408 and Minidsp 2x4

Comparing the Dayton Audio DSP408 and Minidsp 2x4

The DSP408 and Minidsp 2x4 are compact A/D-CPU-D/A units designed to be active crossover appliances with room correction. These are both…
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Mark Zachmann
Jun 16, 2023
Using CamillaDsp with a Motu-M4 as a Crossover

Using CamillaDsp with a Motu-M4 as a Crossover

Traditionally, loudspeakers have internal passive crossovers to funnel highs to tweeters and lows to woofers. This article is about using a…
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Mark Zachmann
May 10, 2023
The Arylic Audio Pro 50+

The Arylic Audio Pro 50+

The Arylic Up2stream S50 Pro+ is a high-def high-feature version of a Chromecast Audio (discontinued a few years ago). Since we now spend…
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Mark Zachmann
Mar 14, 2023
Make a USB Charger and Current Tester

Make a USB Charger and Current Tester

You can make any project portable with this LiPo battery charger and USB test circuit. The USB circuit provides a passthrough of the USB…
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Mark Zachmann
Jan 21, 2023
Make a serial bootloader for the STM32WL (Lora-E5) using Zephyr and MCUBoot

Make a serial bootloader for the STM32WL (Lora-E5) using Zephyr and MCUBoot

Updated June 2024
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Mark Zachmann
Jan 4, 2023
Add a LiPo Battery Charger to the Wio-E5 Mini

Add a LiPo Battery Charger to the Wio-E5 Mini

The Wio-E5 Mini from Seeed Studio is a compact usb/battery-driven LoRa-E5 board but there’s no battery charging option so here’s how to add…
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Mark Zachmann
Nov 2, 2022
A LoRa PingPong for the STM32WLE5 (LoRa-E5 Part 4)

A LoRa PingPong for the STM32WLE5 (LoRa-E5 Part 4)

After setting up the development environment it’s time to write and test a simple LoRa PingPong application — something that sends and…
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Mark Zachmann
Oct 18, 2022
VSCode Building and Debugging Zephyr on the Lora-E5 (Part 3)

VSCode Building and Debugging Zephyr on the Lora-E5 (Part 3)

Building and debugging the code you create with Visual Studio Code is not a hard task, thanks to existing extensions, but it does take some…
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Mark Zachmann
Oct 17, 2022
Lora-E5 Software Development with Zephyr and VSCode (Part 2)

Lora-E5 Software Development with Zephyr and VSCode (Part 2)

Here is how to create a simple STM-raw development environment that lets you build/run the provided Seed Studio LoRaWan examples as well as…
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Mark Zachmann
Oct 16, 2022
The Seeed Studio LoRa-E5 Hardware

The Seeed Studio LoRa-E5 Hardware

The STM32WLE5 CPU+LoRa radio chip is the basis for Seeed Studio’s LoRa-E5 module. They’re both very interesting so I’m going to walk…
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Mark Zachmann
Oct 16, 2022
How to use a Spindle Camera and SpindleView

How to use a Spindle Camera and SpindleView

CNC Spindle Cameras Part IV
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Mark Zachmann
Apr 5, 2022
SpindleView CNC Camera Software

SpindleView CNC Camera Software

Spindle Cameras Part III
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Mark Zachmann
Apr 1, 2022
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