Would you please tell me if I need a circuit board (such as one of ARDUINO’s), in addition to my laptop, to do what I am about to describe? (It would be better if I could just use my laptop, without having to buy another circuit board.) But, if I do need another circuit board, what is the easiest and least expensive one I can get (and, is that one an ARDUINO)? Finally, it has been a long time since I used Java, so I’m not sure if I’m using the word “class” correctly. But, would you please tell me where I can find what Java class(es) I need for the three devices I am about to describe?
I need to receive input from a device. I’m not sure what this device is called yet, but I know it can make a lot of other devices (such as public sinks, paper towel dispensers, and air hand dryers) touchless. It can make them touchless because it knows when something (such as a hand) is waved in front of them. Because I don’t know what this device is called, I’ll refer to it as the first device.
I need the sound of my voice to be played when something is waved in front of the first device. I also need the amount of time after something is waved in front of the first device to be kept track of. Please call that amount of time “x”. And, I need the sound of my voice to be played, with a changed volume, when something is waved again in front of the first device, AND when x is greater than one amount of time, AND when x is lesser than another amount of time.
In addition to a speaker that plays the sound of my voice, I also need another output device, a light (whose brightness I can change). I need these two output devices to be far away from the first device.
Would changing the code of a musical doorbell be a good shortcut?
How much is this going to cost?