This blog post details a proposed design for a Eurorack synthesizer knob with an integrated display. The author, mitxela, outlines a concept where a small OLED screen sits beneath a transparent or translucent knob, allowing for dynamic parameter labeling and value display directly on the knob itself. This eliminates the need for separate screens or labels, streamlining the module interface and providing clear visual feedback. The proposed design uses readily available components and explores different display options, including segmented and character displays, to minimize cost and complexity. The post focuses on the hardware design and briefly touches on software considerations for driving the displays.
This blog post by user "mitxela" details a conceptual design for a novel Eurorack synthesizer module knob with enhanced functionality and visual feedback. The author proposes a digitally controlled knob that addresses several perceived shortcomings of traditional analog potentiometers in the context of modular synthesis. Specifically, the proposed knob utilizes a high-resolution rotary encoder coupled with a circular display surrounding the knob's shaft. This display allows for far more nuanced parameter control and feedback than a standard knob.
The core innovation lies in the display's ability to visually represent various aspects of the parameter being controlled. It can display the parameter's current value numerically, graphically represent its position within a defined range using a bar or arc visualization, and even indicate the parameter's modulation depth when influenced by other modulation sources. Furthermore, the proposed design incorporates color-coding capabilities, potentially allowing users to visually differentiate between different parameter types or to highlight modulation activity.
Mitxela envisions the knob being controlled by a microcontroller, enabling a multitude of advanced features. These include the ability to switch between different display modes, customize the visual representation of the parameter, implement features like snapping to specific values or scales, and potentially even integrate with a computer for more complex control and automation scenarios. The author also explores the possibility of using haptic feedback to enhance the user experience.
While acknowledging the increased complexity and cost compared to standard potentiometers, mitxela argues that the enhanced precision, visual feedback, and potential for advanced features offered by this digital knob concept would significantly benefit Eurorack users, particularly in complex patches where precise parameter control and clear visual feedback are crucial. The post concludes with a call for feedback and suggestions from the Eurorack community, indicating that this is an exploratory concept in its early stages of development.
Summary of Comments ( 109 )
https://news.ycombinator.com/item?id=43793288
Hacker News users generally praised the Eurorack knob idea for its cleverness and potential usefulness. Several commenters highlighted the satisfying tactile feedback described, and some suggested improvements like using magnets for detents or exploring different materials. The discussion touched on manufacturing challenges, with users speculating about cost-effectiveness and potential issues with durability or wobble. There was also some debate about the actual need for such a knob, with some arguing that existing solutions are sufficient, while others expressed enthusiasm for the innovative approach. Finally, a few commenters shared their own experiences with similar DIY projects or offered alternative design ideas.
The Hacker News post "Eurorack Knob Idea" discussing the euroknob project at mitxela.com/projects/euroknob generated a modest amount of discussion, with several commenters expressing interest and offering their perspectives.
One of the most compelling threads revolved around the practicality and cost-effectiveness of the proposed design. A commenter pointed out that injection molding the knobs, especially with custom inserts, could be quite expensive for small production runs. They suggested exploring alternative manufacturing methods like 3D printing for prototyping or smaller batches, even though it might not achieve the same level of precision and finish. This sparked further discussion about the potential trade-offs between cost, quality, and the scale of production.
Another commenter questioned the choice of material, suggesting that using a material with inherent grip, rather than relying on knurling, might be more beneficial. They also raised concerns about the durability of the proposed design, particularly in the context of frequent use and potential wear and tear in a modular synthesizer environment.
Several users expressed appreciation for the innovative approach to addressing the common problem of loose knobs in Eurorack synthesizers. They praised the author for tackling a real-world issue within the community. One commenter even suggested exploring the possibility of adapting the design for other types of knobs and controls beyond Eurorack modules.
A few commenters shared their personal experiences with similar DIY solutions, mentioning using Sugru or other moldable adhesives to improve the grip of their existing knobs. This highlighted the existing demand for a more robust and elegant solution like the one proposed.
While there wasn't an overwhelming number of comments, the discussion provided valuable insights into the potential challenges and benefits of the euroknob design, touching upon manufacturing processes, material selection, cost considerations, and the practical needs of the Eurorack community.