The circuit will have two main part:
- Driving part: amplify control signal, protect itself and stepper motor
- Controlling part: control driving part to have 1rpm. This part maybe a low cost simple pulse generator (tweak rpm by a potentiometer), or a MCU-based solution. MCU may be a Arduino-based for simple firmware developing, or a low-cost, small size like PIC16
Since I have design stepper driver for many projects (for example screw feeder, automatic screw assembling, blood analyzer, etc), can support you to pick up and design appropriate solution (balance cost, size, etc).
At the end, you'll receive:
- Original Altium schematic and layout files
- PCB 3D rendering
- BOM, gerber files for PCB ordering
And the last one, you do not worry about your money, no down payment, just pay after receiving works