Jeroen's Project Journals

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  • 3-channel audio amplifier. Mains-powered and with digital volume control. Includes a 3D printed enclosure matching the Teensy DSP/DAC, OLED display and rotary click-encoder control

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That's a relief!

2024-01-09

The PY2258’s arrived, and I built a breadboard version of the reference schematic found in the datasheet:

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That's a relief!

2023-12-28

So I reinstalled the 12V MeanWell PSU, wired everything back up minus the volume control boards, and now everything seems to be back in working condition. So that’s a huge relief!

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Carrier board design

2023-12-27

I’ve been going back and forth on this carrier-board design for a while now. The current iteration looks like this:

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Introduction

2023-12-26

For my Concrete Subwoofer, along with a DSP/DAC, I needed an amplifier. I decided to create a 3-channel amp using cheap mono amplifier modules based on the TI TPA3118 class-D amplifier chip. These modules are cheap and I already had one lying around from another project. So I ordered 2 more and designed an enclosure with room for the 3 modules and a small MeanWell power supply, a front-panel fitting a rotary encoder and display and a rear-panel with the mains inlet, line-inputs and speaker-level outputs:

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