With your bit write how you want to do it. ( SMD or normal ) analog or digital.
Using ARDUINO is possible if you can delivery PLUG and PLAY system which works after conecting the power.
I need complete PCB layout.
If you can build a working prototype let me know the price. ( but this is additionally )
I am looking for very simple design with low amount of components. ( the price is crucial )
If the product not performe like is writen in Specifications, you need to do modifications at your own cost/time until the product performe like is in Specifications.
You can decide if you want just money for your work or you can add your name on the PCB layout ( or web page ) This will be on each PCB manufactured and enclosed in transparent housing to allow seeing your text on the board from each customer.
Matching motors: 6 wires an 4 wires stepper motor (2-phase)
Voltage (stepper motor): 5-12VDC
Rotary switch for adjustment of the motor current
Speed indicator: 4x Seven-segment display ( something like MT03641BR . )
Control range of stepping motor speed: 0~100 rpm (adjustment in 0,1 RPM )
Jumper to switch in to height speed mode (motor speed: 0~1000 rpm (adjustment in 1 RPM )
Button to start and stop and button to change the direction.
How to adjust the speed is on you, if button are used to go up and down with speed or just a simple potentiometer you will decide.