# Flux + Fable 5.2 (Preview) Try Fable 5.2 in Flux, your AI hardware engineer. Select it from the Preview group and start with prompts for electronics and mechanical design. Written by [Flux](#) Published Nov 2026 - 3 min read ![Flux + Fable 5.2 (Preview)](https://www.flux.ai/p/assets/blogs/flux-fable-5-2-preview/v2/main.webp) ## Flux is your AI hardware engineer, and we added Fable 5.2 to Copilot. Bring a sensor interface and its housing into one design conversation. Share the signal requirements, installation drawing, and manufacturing constraints. Ask Copilot to plan the electrical connections and mechanical fit around the same specification. Use a concrete task from your project to explore the preview with your team. Fable 5.2 is a two-week preview. The preview ends on November 23, 2026. ### Try It Now [![Copilot model menu with Fable 5.2 selected in the Preview group](https://www.flux.ai/p/assets/blogs/flux-fable-5-2-preview/v2/selector.webp)](https://www.flux.ai/p/assets/blogs/flux-fable-5-2-preview/v2/selector.webp) Open any project in Flux and launch Copilot. Open the model menu in the composer, find the Preview group, and select “Fable 5.2”. Give it a task from your device specification. Start with the sensor interface or the mounting bracket, and include the constraints that connect them: > *“Plan the analog input stage for an industrial sensor interface. Use the source impedance, signal range, and sampling requirements I provide.”* > *“Plan the sensor housing and mounting bracket. Use the installation envelope, cable entry, and service clearance I provide.”* [Try Fable 5.2 in Flux now](https://flux.ai/) ### What’s New and Better Fable 5.2 is an option in the Preview group. The model menu describes it as “Anthropic's newest model.” Bring that model choice into a workflow built around your hardware project: - Start with the sensor interface and the requirements that govern it. - Plan the mounting bracket around the board, connectors, and assembly needs. - Review the proposed changes against electrical and mechanical constraints. - Continue the design conversation with the project context in view. Flux has live context on your design, down to parts, pins, nets, properties, constraints, and stackups. Its automated workflows support stepwise actions, constraint-aware edits, and iterative design changes in your project. You can bring the board and its enclosure into the same conversation instead of treating them as separate designs. A knowledge base of industry best practices and embedded design and process checks adds context for the work. Share your team's requirements so the design plan addresses the device you need to build. ### Try It on a Real Design Try this microphone-preamplifier prompt as a concrete analog design task. Supply the relevant datasheets and ask Copilot for a plan before requesting edits. > Design a low-noise microphone preamplifier for an electret condenser mic feeding a 24-bit ADC. You must calculate the bias network, gain-setting resistors, coupling capacitors, input high-pass cutoff, output anti-aliasing RC, and decoupling layout. Follow the op-amp and microphone capsule datasheets, ADC input requirements, and industry best practices. It will be integrated into a design. Supply: 3.3V analog rail. Mic bias: 2.0 V through resistor, current ~0.5 mA. Target gain: 20 dB to 40 dB switchable. Bandwidth: 20 Hz to 20 kHz. Input noise target: as low as practical. Include pop-suppression considerations and star-grounding strategy. [Try it Now](https://www.flux.ai/signup?destinationPath=%2Fprojects%2Fcreate%3Fprompt%3DDesign%2520a%2520low-noise%2520microphone%2520preamplifier%2520for%2520an%2520electret%2520condenser%2520mic%2520feeding%2520a%252024-bit%2520ADC%252E%2520You%2520must%2520calculate%2520the%2520bias%2520network%252C%2520gain-setting%2520resistors%252C%2520coupling%2520capacitors%252C%2520input%2520high-pass%2520cutoff%252C%2520output%2520anti-aliasing%2520RC%252C%2520and%2520decoupling%2520layout%252E%2520Follow%2520the%2520op-amp%2520and%2520microphone%2520capsule%2520datasheets%252C%2520ADC%2520input%2520requirements%252C%2520and%2520industry%2520best%2520practices%252E%2520It%2520will%2520be%2520integrated%2520into%2520a%2520design%252E%2520Supply%253A%25203%252E3V%2520analog%2520rail%252E%2520Mic%2520bias%253A%25202%252E0%2520V%2520through%2520resistor%252C%2520current%2520~0%252E5%2520mA%252E%2520Target%2520gain%253A%252020%2520dB%2520to%252040%2520dB%2520switchable%252E%2520Bandwidth%253A%252020%2520Hz%2520to%252020%2520kHz%252E%2520Input%2520noise%2520target%253A%2520as%2520low%2520as%2520practical%252E%2520Include%2520pop-suppression%2520considerations%2520and%2520star-grounding%2520strategy%252E) Then connect the circuit to the mechanical design. Ask for a housing and mounting plan that uses the board outline, component heights, microphone opening, cable entry, and service access. Include the manufacturing tolerances and enclosure bonding requirements in the same plan. ### Getting the most from Fable 5.2 in Flux - **Supply the source documents.** Share the sensor datasheets, installation drawing, and mechanical requirements. - **Set a review point.** Review the input-stage plan and mounting concept before requesting edits. - **Connect electronics and mechanics.** Include the board-to-housing fit and the installation requirements in your review. - **Plan before you act.** Review the change plan against your requirements before requesting edits. ### What’s Next Keep the next step tied to your device requirements. Continue from the sensor interface to the mounting bracket, then review how the two fit together: - Resolve the remaining power and signal interface decisions. - Set the enclosure envelope, mounting locations, and connector access. - Plan the cable paths and the order of assembly. - Review the complete device with your engineering team. Open Flux, select “Fable 5.2” from the Preview group in the composer model menu, and bring your next design question into the project. Start with one specific change and carry its electrical and mechanical requirements through the plan. [Try Fable 5.2 in Flux now](https://flux.ai/) Let’s start building Build your big idea together with Flux. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. ![Close-up photo of a PCB made with Flux, with an ESP32 module, buttons, and a microSD slot.](https://www.flux.ai/p/assets/blogs/miscellaneous/sidebar-cta-pcb.webp) [Try it Free](https://www.flux.ai/signup) ## More in AI & Prompt Engineering for Hardware [ ![What Makes a Perfect PCB Design Prompt](https://www.flux.ai/p/assets/blogs/how-to-write-a-perfect-pcb-design-prompt/main.webp) ### What Makes a Perfect PCB Design Prompt 8 Min Read](https://www.flux.ai/p/blog/what-makes-a-perfect-pcb-design-prompt)[ ![Flux, an AI hardware engineer pointing out the dos and don'ts when prompting.](https://www.flux.ai/p/assets/blogs/prompting-guide/main.webp) ### Prompting Guide: Working with Flux from Idea to Schematic 9 Min Read](https://www.flux.ai/p/blog/prompting-guide-working-with-flux-from-idea-to-schematic)[ ![A space-themed image with a central cartoon astronaut helmet against a backdrop of stars and nebulae in shades of purple. 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Let’s build your idea together. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. [Try it Free](https://www.flux.ai/signup) ![Close-up of a Flux-designed printed circuit board](https://www.flux.ai/p/assets/homepage-v2/mission-visual.webp)