Potentiometer Headers
The KABD series of amplifiers come with four headers to make it easy to add external potentiometers, button,
switches or rotary encoders to your project. Each of these 3-pin headers expose a voltage supply, GND, and a
multipurpose pin of the ADAU1701. The optional cable pack for the KABD series comes with 4 potentiometers
with cables that connect directly to these ports, so no soldering is required and they are easy to add to your
project. The ports for these potentiometers are 3-pin JST headers and are clearly labelled as POT1-4. The
potentiometers in the cable pack are 1k Ohm. Buttons or switches can also be easily attached to these ports and
should connect to Pin 1 (GND) and Pin 2 (MP#) as labelled above and the corresponding multipurpose pin must be
configured as “Input GPIO Debounce” as seen on the next page.
Out of the box, each KABD amplifier is pre-programmed for the potentiomers to have some basic functions,
however there are numerous example projects for most other use cases and can be easily customized with
SigmaStudio. A chart of the default potentiometer functions is below.
For instruction on how to use potentiometers or buttons/switches in SigmaStudio projects, see the “SigmaStudio
for the KABD series” guide for detailed information.
Note:
If the potentiometers for making on-the-fly adjustments, the potentiometers
must be left plugged in
for the
changes to remain active. For example, if you use POT3 to enable a high pass filter on your speaker outputs, you
must leave that potentiometer plugged in for the HPF to remain active. When you remove the potentiomers, the
HPF will deactivate. If you do not want to leave the potentiometers plugged in for something like a high pass filter,
you need to reprogram the board via SigmaStudio with your custom configuration.
