design a circut board

Job ID: 36901642

Budget: $250 – $750 AUD

I'm seeking a freelancer to design a circut board for a low voltage project. I do not have a schematic, so I am open for suggestions on the design.

We are looking for a circut board design to control a 12volt pump on a weed sprayer,

This video explains the machine
https://photos.app.goo.gl/6GTWRQjRZNmQdiFMA

- Input 12 V from a car battery.
- Output 12v to a small poison spray pump.
- Poison control pump 12V 10 amps draw
- low-cost solution without wifi or BLE

As described in the video we need a device to replace the operator’s thumb on the control button for the machine. We need to be able to adjust the length of time the pump runs at a factory level – this run time will be set up before the unit is delivered to the end user. We need to have the operator with the ability to adjust the frequency the pump runs using a multi position dial. The output needs to be intermittent with the ability to adjust the duration of supply and the duration of non-supply. the circuit board needs to be mounted in an enclosure with a 5 to 7 position switch an operator can adjust the duration of the non-supply periods, needs a on off switch for the operator and a led light to indicate to the operator when the supply is active and another to indicate if the unit has power.
Attached is a unit that is like what we wish to make. The example notes “weed sensor” the model we make will not include a weed sensor.

so if you have the ideas and capabilities to successfully carry out this project, please don't hesitate to contact me. Thank you.