§ 3 - Mixer Block Builds

§ 3.1 - Build Guides

• DC-coupled Single-channel Stereo Amplifier
• AC-coupled Single-channel Stereo Amplifier
   
  
• DC-coupled 15 Channel Mono Mixer
• AC-coupled 15 Channel Mono Mixer
   
  
• DC-coupled 8 Channel Stereo Mixer
• AC-coupled 8 Channel Stereo Mixer
   
  
• DC-coupled Single-channel Mono Dual Buffer or Amplifier
• AC-coupled Single-channel Mono Dual Buffer or Amplifier

§ 3.2 - Overview

It's getting to the point where it is common to have many audio sources on our desks. The outputs of desktop and/or laptop computer(s); smart speakers like the Echo, the Nest, the MyCroft; media players; musical instrument processors; bluetooth receivers; security systems; and more.

However, most of us only have one audio system to route these various signal sources through. The typical audio system, if it has multiple inputs at all, only lets you choose to listen to one audio source at once. What to do?

The Black Belt Systems Mixer Block solves this problem by allowing you to connect up to eight line-level stereo audio sources to it, which are then mixed properly into one stereo output; you feed that into your amplifier, and then you can hear all of your audio sources, all of the time, all without having to switch or adjust anything.

That's not all the Mixer Block can do. It can be built and/or jumper-configured to provide other functions as well.

§ 3.2.1 - Features

• Compatible with a broad variety of dual op-amp ICs
• Wide range of practical gains and gain bandwidths
• Very low noise floor, > -105 dBm
• Pinned out for .100 inch dual-row headers, independent ground and signal input x 16
• Pinned out for .200 inch audio output connections
• Pinned out for .200 inch power headers
• Utilizes +/- power supplies [can use our RFI-free Power Block]
• M3 mounting hardware compatible, including standoffs, t-nuts
• Boards are stackable
• No circuit traces hidden under components
• Compact size: 2.5" by 2.5" (63.5mm by 63.5mm)
• Easy to build

 

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