A Force Feed-Back Eurorack DSP Module

BeetTweek is a Eurorack format DSP module designed to give musicians a new way to interact with musical control signals (CV) with a force feedback knob. Rhythmic signal CV signals can be used to "pulse" the knob, giving the musician a unique feel for the music they are creating or parameter they are controlling. Knob rotation, speed and other parameters can be used to control other modules and generate interesting interactions that can be felt while turning the knob.
BeetTweek can be configured in many different ways, made possible with the built-in modes and variants, in addition to the modular nature of Eurorack!

Features:
High Precision AS5048A 14-bit rotary sensor
Smooth 3-phase brushless motor provides haptic force feedback
4 16-bit DC-Coupled, Low Pass Filtered DAC Outputs.
4 16-bit ADC Filtered Inputs.
80 RBG Knob Ring Indicator LEDs. With 8 Center LEDs
USB Programmable (Firmware Updates) with Custom Cross-Platform Software.
Fast 480MHZ Cortex-M7 Primary Processor and 168MHZ Cortex-M4 Knob Processor
8 RGB LED's for inputs and outputs showing function depending on the current mode.
Mode, Function and 8 menu/input-output Buttons
Reverse Voltage Protection (Backwards Eurorack cable protection)
High Quality Laser Engraved Aluminum Front Panel
Custom Chem-film coated and protected CNC milled knob.
Approx 40us input-output delay
Max Voltage Range: -8V to 8V inputs and outputs
12V: 180mA
5V: 0mA
-12V: 1mA

Modes:
The Following are the modes that can can be selected. Some modes are still in the planning and development phase, and if not finished by the end of the kickstarter, will come out as firmware updates later.

Modes can be selected by pushing the MODE button and then subsequently selecting one of the 8 front panel buttons representing the available modes. Once selected, the module will switch to that mode. If a mode has multiple variants, after selecting a mode, you can then select a corresponding variant.
Some modes have adjustable parameters, these can be controlled by pressing the FUNC button and then adjusting the knob or pressing the +/- buttons to adjust the parameter.

Spring Mode (Button 1, Red) - In this mode, the Knob will always spring back to a given Input (CV) rotation. The Output's corresponds to the current knob rotation, velocity, and torque force. On its own this is a great way of temporarily "overriding" an external module parameter while knowing it will return to its original location. (Good for "solo" parts of a song"). By giving the module an input CV signal, the "target" or equilibrium rotation of the spring will change, this can be a great way to feed in a kickdrum GATE signal that you can feel in hand while performing.
Inputs and Outputs:
X: Target Rotation Displacement
W: Enable/Disable Spring
Variant 1:
A: Relative angle to target rotation
B: Absolute Knob Angle
Variant 2: (LFO 1)
A: Sin wave LFO with speed relative to spring rotational distance
B: Ramp wave LFO with speed relative to spring rotational distance
Variant 2: (LFO 2)
A: Sin wave LFO with speed increased or decreased relative to spring rotational distance
B: Ramp wave LFO with speed increased or decreased relative to spring rotational distance

Torque Mode (Button 2, Yellow) - In this mode, the knob is free to spin, while the input CV signals control how much torque is applied to the knob, when a positive signal is used, the knob will rotate in a positive direction, while when a negative signal is used, the knob will rotate in a negative direction. Complex input signals can be used to generate complex forces on the knob. More possibilities arise when feeding back the output of the knob back into the input (with potentially other modules).
Inputs and Outputs:
X: Torque
A: Absolute Knob Angle
B: Sin of Knob Angle
C: Pass through of input Torque
D: Knob Rotational Velocity

Friction mode (Button 3, Green) - In this mode the knob is free to spin, while the input CV signal is used to adjust the amount of friction the knob has. There are outputs corresponding to the rotation of the knob.
Inputs and Outputs:
X: Friction
A: Absolute Knob Angle
B: Sin of Knob Angle
C: Back Frictional Torque Generated
D: Knob Rotational Velocity

Indent Mode (Button 4, Cyan)- In this mode, the knob "snaps" to different locations around the circle.
Inputs and Outputs:
X: Bias Torque
A: Absolute Knob Angle

Ratchet Mode (Button 5, Blue) - The knob rotates one way freely but not the other. Output CV's correspond to how much force you exert on the knob that is in the opposite of the ratchet direction. Input CV's adjust the ratchet density, rotational offset, and direction.
Inputs and Outputs:
X: Tail Follow Rate
Y: Direction Change (Gate Signal)
A: Distance From ratchet origin
B: Sin of current angle
C: Cos of current angle
D: Angular Velocity

https://www.kickstarter.com/projects/submatrix/beettweek-a-force-feed-back-eurorack-dsp-module

• 180 mA +12V
• 1 mA -12V
• 0 mA 5V
• 47 mm Depth

This Module is an early prototype, a concept in development, or an AI mockup