Sounds like you’re just kicking off with a journey into electronics. The short answer is, this is going to be a fairly decent time-commitment project.
First of all, 115VAC is lethal. Only a qualified electrician or technician should be working with those voltages. Especially in Australia, where it’s a criminal offense to do so, and will void house insurance etc if a fire or damage ensues.
But I’d be surprised if you even need to use that gauge. You could 3D model something similar, use a couple of small servos and make something that “looks” like this but is entirely DIY.
The best place to start is to learn the ropes with electronics. To do that, consider a kit like this:
That kit will take you through all of the essential steps to build circuits, and program a development board (in this case, an Arduino board). Included is a guide for working with servos, which could drive the dials on the DIY gauge.
Then, get into 3D modeling guides. You don’t need a printer if you prepare the file and send to a printing service.
Now i will do my homework as well ,it is clearer when somebody explanes in detail everything .If you know what I mean I have Alot of Electronics books and they dont explain anything from beginning ,they expect a Electronics Degree or something.
I’ll be honest, I had to google what an IO card was. I think you are trying to start out at an Electrical Engineer level. I recommend trying out Arduino, as its very well documented and designed for all levels. Later down the road when you have a better understanding you can move into designing your own boards. You shouldn’t really need to though because available boards are so versatile.