This is what you are going to need for this project, if you can, please vote if this instructable is in a contest and if you have project ideas or questions please put them in the comments, thank you and i hope you would enjoy this instructable :)
Step 1: Making the Diaphragm Chamber...
In the pictures above you can see the steps in making the diaphragm:
First, cut the chamber at the size you want, it does not have to be exact, 10cm would work just fine.
Then, get some rubberised washers <<i know this is not the correct form>>, washers with rubber or something soft on one side so that it doesn't scratch the membrane.
After that use the image in wich you see the screw, membrane, washer and nut (by the way, use an extra rubber washer between the screw head and the membrane).
Cut the glove without the fingers and put a single screw in it (not two like you see in the picture because it is gonna break the membrane sooner).
And finally, zip-tie it to the chamber (or use rubber bands or both).
Step 2: Get Those Valves Working
In this step you just need to add two valves that suck the air and one that pushes it.
Then just seal them with hot glue or epoxy.
Side note: do this before you add the membrane...
Step 3: Assemble the Gear...
Take a piece of plastic and a gear and glue them together.
After that, drill a hole like you see in the picture and trim the excess plastic from the wheel so that it is a nice circle.
Step 4: Get That Motor Going...
Glue the gear to the axis of the motor, and glue the motor to the pvc cap, glue the pvc cap on a piece of wood.
Step 5: Rise and Connect...
Put a piece of plastic (a plastic cap in this case) under the membrane chamber so that the bolt of the chamber is at the same level with the axis of the motor.
Then bend that strong wire at an end and put it inside the hole.
Bend the other end of the wire like you see here and connect it with the screw betweed the nut from the washer and
the nut from the end.
Step 7: Finish It..
Now, just connect the wire from the chamber to the motor and power it !
Thank you for reading this instructable!