Ok, so I’ll start with some project context.
My dog is really well behaved in almost all senses, except when the mailman comes’a’knocking. In these instances he will bark, bork and berk until my neighbors ears are bleeding. This is a problem, and I enjoy using Arduino to fix problems.
I want to create a wireless module I can place by my door, that is controlled via sound sensor or by a smartphone app that I can use to startle the dog with a high-power ultrasonic sound.
That smart phone and comms element will be fairly simple and I shouldn’t have much trouble sorting it. Where I am some what perplexed however is the implementation of the 40khz transducer required for the noise.
I purchased one of these: Arduino proximity sensor
My understanding is that this board has two simple 40kHz transducers which I can de-solder and implement in my own circuit, is this true?
I was also wondering how to control the volume of the noise? Does anyone have any ideas regarding voltage etc.? Would I need to (complete noob guess) insert a 40kHz crystal to produce the right kind of modulation?