•  Overview.
This board comes as a solution to replacing ANY control that works with a real potentiometer. So it can be controlled by a PC, PLC or other electronic control. It can take PWM, frequency (0-25khz), or an analog 0-10vdc signal and produce a real turning potentiometer. The board comes with a 1Mohms resistor, but the final value can be adjusted (decreased) by placing a parallel resistor in the on-board terminals.

The board has a microcontroller that samples the input signal. It analyzes it and then drives a stepper motor that positions a REAL potentiometer.

This unit can also be used on many AC motor controllers by replacing the potentiometer that controls the speed. This is very useful for routers and other AC speed controllers.

This unit could also be used for controlling directly many DC motors just by varying the DC voltage coming into the motor.

Features :
•  Controls any AC or DC current. Since it works with a REAL pot, it can control ANYTHING. The final impedance can be adjusted by placing a parallel resistor in the terminals provided for this purpose. It is also possible to replace the provided pot with your own and double the stepper motor’s torque by powering the board with 24vdc. (This modification is under your own risk.)

•  It is ideal for modifying manual AC speed controllers commonly used for routers. This board is ideal for replacing the manual potentiometer found on many manual AC speed controllers. You just have to solder some leads from the current potentiometer and attach those leads to the screw-on terminals on the board. You can continue using the potentiometer that is on the speed controller. It will work in parallel with the on-board pot, so it could be used for manually reducing the current speed. This speed controller can be found at: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=43060.

•  Has 3 user selectable operation modes, PWM, frequency (0-25khz), and analog 0-10vdc. Since it works with a REAL pot, it can control ANYTHING. The final impedance can be adjusted by placing a parallel resistor in the terminals provided for this purpose. It is also possible to replace the provided pot with your own and double the stepper motor’s torque by powering the board with 24vdc.

•  Terminals for fitting a parallel resistor adjust final impedance. Comes with a 1Mohms resistor and terminals connected in parallel with it. So the final impedance can be adjusted (reduced) by placing a resistor in these terminals. This gives maximum flexibility, as the user can replace virtually ANY potentiometer.

 •  Can be powered with +12 or +24vdc. The board requires an external power source, it can be 12 or 24vdc. The board works fine at 12vdc, but if you provide it 24 it will double the torque at which the stepper motor works. This could become useful if you wan to replace the proved pot with your own.