An AI assistant that handles the legwork so you can focus on the hard problems.

Phosphor reads your schematics, digs through datasheets, and searches for parts.
Verified, cited, and on your machine.

Phosphor Tools desktop app showing a PCB probe point query

Review. Source. Build.

STM32F4PA8 → SDIO_D0PC12 → SDIO_CLKSD CardDAT0CLK⚠ PA8 cannot mux SDIO_D0Ref: RM0090 Table 9, p.272

Design review beyond DRC.

Phosphor cross-references your schematic against datasheet constraints: pin mux configurations, power sequencing, enable thresholds, across your entire design.

"Can the STM32 mux SDIO on the pins I've wired it to?"

TLV61070ACold: 1.3V typ ⚠Isw: 2.0A ✓Iq: 20µASOT-23-6✓ 12k in stock$0.24 @3kTPS61201Cold: 0.5V max ✓Isw: 1.2A ⚠Iq: 50µA ⚠VSON-10✓ 976 in stock$1.74 @1kLTC3539Cold: 0.88V ✓Isw: 2.0A ✓Iq: 10µA ✓DFN-8✓ 10k in stock$4.78 @2.5k↑ #1 overall — ranking shifts if cold-start must be guaranteed

Smarter part search.

Phosphor doesn't just filter parameters. It reads datasheets, reasons about your requirements, and verifies that a part actually meets your constraints. Stock, pricing, and alternatives included.

"Find me a boost converter: 300mA, 3.3V out, near-dead alkaline input, under 8mm², in stock."

U3Probe here

Faster board bringup.

Ask questions about your physical board and get answers grounded in the actual layout. Trace routing, probe points, impedance, all queryable.

"Find me a convenient place to probe the I2C bus."

Built for your tools and file formats.

Schematics

Altium (.SchDoc), KiCad (.kicad_sch), OrCAD (.dsn), Eagle (.sch)

PCBs

Altium (.PcbDoc), KiCad (.kicad_pcb)

Datasheets

Search by part number, structured PDF reading with table extraction

Parts

DigiKey parametric search, stock, pricing, alternatives

Also: SPICE simulation setup, instrument control, Python scripting, schematic symbol and footprint generation (coming soon).

Results you can trust.

Phosphor's citation system requires the model to cite source data for every claim. A verification step checks that each citation is accurate. You see page numbers, specs, and references alongside every answer, so you can confirm for yourself. A built-in knowledge library grounds the model in best practices for repeatable, reliable results.

Your machinePhosphorDesktop appSchematicsPCBs, docsstays localLLM Provideror your gatewayDoc Processingor self-hostedNo files stored

You control your data.

Phosphor runs on your desktop. Your files are never uploaded to our servers. Design data sent to the LLM provider is not stored or used for training. Enterprise teams can bring their own API keys, route through their own LLM gateway, and self-host the document processing pipeline.

Basic

  • Schematic reading (all formats)
  • Datasheet search and reading
  • Calculation tools
  • Core knowledge library
  • MCP access
Book a Demo

Pro

  • Everything in Basic
  • PCB visualization and spatial queries
  • Part search and alternatives (DigiKey)
  • Full knowledge library (SPICE, instruments)
  • Python scripting environment
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Enterprise

  • Everything in Pro
  • SSO
  • Bring your own API keys or AI gateway
  • Self-hosted document processing
  • Custom knowledge library
Book a Demo