Hi ttrezona,
also a welcome from me to you.
If your project isn't urgent I will sit down and use an already available PWM circuit (or design another one) and design a PCB layout for you.
You might then build the circuit on a board.
You have several options:
A) toner transfer: The image of the PCB is printed on glossy paper using a laser printer. Then the paper is fixed onto a clean copper clad board and the toner ironed to the copper layer. Using laminator the result will be better than using an iron because of equally distributed heat. Heat will melt the toner and transfer it to the copper clad.
B) photo transfer: The image is printed onto a transparent foil which is used to transfer the image on UV-sensitive PCB material. That method requires photo equipment like an UV-exposure box and developer.
A and B require an etchant like ferric chloride to etch excessive copper off the copper clad to leave pads and traces for further processing (drilling)
C) the cheapest method - strip board: Plan thoroughly where the strips need to be interrupted to avoid shorts and solder components in place connecting them with insulated wire
D) Using a friend: If you have a friend who is into electronics he will have the equipment to make a printed circuit board. Knock his door with your foot (hands are occupied with a case of beer) and ask him for the favor to make a PCB for you.
I need some more info about your pump motor to make the circuit properly without overkill concerning the power driver.
- nominal and maximum operating voltage and current.
Boncuk