Theremino stepper driver controller board V2.

This assembled PCB can carry different stepper driver and have the following characteristics:

• Golden I / O pins
• High quality PCB.
• Separate green LED for each Step and Line to indicate proper activity.
• The connectors for the drivers are of high quality obtained on the lathe processing.
• Step, Direction for each driver, and Enable control interface is valid for all driver.
• Three jumpers pin to select the step resolutions (microstepping).
• LED status indicators for Step and Dir for each driver.
• Carry different types of stepper drivers like Drv8825, DRV8824, A4988 and other similar driver that are pin compatible.
• Completely opto-insulated, it provides a true galvanic isolation between the power circuit of the steppers and the circuit of the Theremino Master.
• Maintain separate the masses of the inputs from the masses of power.
• Power: from 8 to 36 volts, (we recommend not to exceed 32 volts for overheating the drivers and excessive thermal dissipation).
• MOSFET output, you must dimension the load taking account of these currents shall be up to about 16 Ampere.
• A connector (on the left) reports the positive supply voltage and connections to two MOSFET.
• Maximum voltage tolerated by the MOSFET  is 60 volts but is better not to exceed 50.
• Maximum current bearable by the MOSFET is 20 amperes (without heatsink).
• The MOSFET can be controlled in PWM. We recommend that you use no more than 20 KHz in order not to increase their dissipation.
• MOSFET  switching times are less than 100 NS.
• Photo-Coupler delay is  800 NS.
• Switching regulator on board creates a 5 Volts for logic and for the fans. Max current 400 mA
• Screw clamps for stepper motor cables.
• High quality PCB.
• PCB with slots for high insulation.