Firstly, I am still in awe with how good the Toradex and surrounding developer infrastructure is. It has saved me weeks of stress and mistakes. I had a real complex job with lots of hardware and it took 10% of the usual effort; in fact I have not needed to go and scream in the carpark at all (due to a unforeseen release of the magic smoke).
I am making an application that will implement a nice touchscreen text editor, and want to add haptic feedback (i.e. a little mechanical click or buzz) each time the punter hits a key. This makes the keying activity better and means the punter will hit the screen a little softer and its likely it will last longer. We are using the resistive screen because the operator will have two pairs pairs of protective gloves on, might even use a stylus to press the keys. If I had hectares of space inside my casing I would just add a buffer amp onto the output from the module audio output to protect the module, but I am a bit tight for space.
Since I still have to just finish off the custom board I can still ask this question about hardware.
My little surface mount sounder speakers are 8ohm and sub-watt.
My question is: I just need a click or “tap” noise. Can you use a sounder with the Colibri imx8 module without a further amp ? If not, are there reference circuit suggestions that will protect the Colibri module and also provide enough volume whilst being small enough to put on a Viola design based custom board?.
Any suggestions would be brilliant.