FreeDSP INTEGRA

[CyberPit]

Hello Guys,

Now I am planning the DSP-integrated Power Amplifier Board Project.
Current ideas are two variations ...

• FreeDSP INTEGRA Duo (ADAU1466 + TAS6422) Stereo Speaker Output
• FreeDSP INTEGRA Quad (ADAU1466 + TAS6424) 4ch Speaker Output

For starters, now I'm working on a 2ch version prototype design. The intention was to install the Full-Range/2-way boombox enclosure.
But this can be a single-board solution for desktop audio systems...

Input

• RCA Analog
• Optical S/PDIF
• Coax S/PDIF or AES/EBU
• USB (Amanero Combo384)
• Raspberry-pi Zero W/2W

Control

• AUX POT x1 (for DSP)
• Source Selector (TBD)
• Rotary Encoder x1 (for Power-Amp)
• A push-button or clickable Rotary Encoder
• 3digits LED Display
• PIC16F18346 MPU

Output

• Speaker Output x2 (Duo), x4(Quad)
• Optical S/PDIF

Power Supply

• 2.5mm Center 5.5mm Sleeve Wall Power Adaptor or 24V 4A PSU
• Screw Terminal for Power Switch

CyberPit

 

[CyberPit]

Here's a prototype PCBA...


CyberPit

 

[CyberPit]

Those are two types of input implementations...



CyberPit

 

[CyberPit]

Software development has started...


CyberPit

 

[eclipsevl]

Any measurements available?

 

[CyberPit]

Optical Input to Speaker output measured with E1DA Cosmos ADC, loaded 4ohms metal clad resistor. Vcc=24.0V

Digital Zero


0.1W @ 4ohms


1W @ 4ohms


10W @ 4ohms


CyberPit