Layout    Schematic

The OTTO Switching module is a simple 2:1 switch which allows you to connect two I²S input modules (or any other I²S sources) and feed a single Opus DAC (or other I²S consumer). The switch is triggered by connecting the module's V+ terminal to the TR (trigger) terminal, which can be done by a simple switch or by a microcontroller.

I²S switching is only one application of the OTTO, however. The relay (OMRON G6A 4PDT) can switch up to 3A, so, for example, it can easily be used as a 2:1 or 1:2 switch for balanced or single-ended analog signals, or even as a phase reversal switch.