• Bench diagnostic and repair station for phones, tablets, batteries, displays, vibrators/sensors, chip reads/writes, and fast-charge/power testing.
• Intended for electronics repair technicians, prototyping benches, and advanced hobbyist diagnostic workflows.
• Current scope is a concept/specification only; no schematic has been created yet.

• Provide a regulated adjustable DC output from 0.2 V to 30 V.
• Supply up to 10 A, with stated total output power target of 320 W.
• Show real-time voltage, current, power, and graph/status information on a touchscreen.
• Support multi-device charging/testing and protocol detection.
• Support plug-and-play expansion modules for phone, battery, display, and data/debug workflows.
• Support online updates and cloud/data features if a networked compute subsystem is selected.

• 320 W high-precision regulated power supply.
• Adjustable output: 0.2–30 V, 0–10 A.
• Real-time voltage/current/power display and output monitoring.
• Multi-port simultaneous testing.
• Multi-protocol fast-charge and diagnostic support.
• 4.3 inch color touchscreen UI.
• Raspberry Pi 5 master controller for UI, database, networking, and high-level orchestration.
• Teensy 4.1 real-time controller for ADC sampling, battery data protocol reading, protection interlocks, and buck-stage control.
• Modular expansion board interface.
• Protection features: over-current, over-voltage, over-temperature, short-circuit, and low-ripple/high-stability behavior.

Updated control partition: Raspberry Pi 5 handles UI/database logic; Teensy 4.1 handles deterministic measurement and hardware control. Pi-to-Teensy communication will be either direct USB serial, dedicated 3.3 V UART, or both.
flowchart TD
  AC[AC 100-240 V Input] --> PSU[Isolated AC-DC Power Stage]
  PSU --> DCBUS[DC Bus]
  DCBUS --> PROGRAM[Programmable Buck Output 0.2-30 V 0-10 A]
  PROGRAM --> OUT[Banana / DC Output Ports]
  DCBUS --> AUX[AUX Regulators 12 V / 5 V / 3.3 V]
  AUX --> MCU[Main Controller]
  MCU --> TOUCH[4.3 inch Touch Display]
  MCU --> ADC[Voltage / Current / Temp Measurement]
  MCU --> PROTO[USB-C / Lightning / Protocol Analyzer]
  MCU --> MODULE[Expansion Module Connector]
  PROTO --> DUT[Device Under Test Ports]
  MODULE --> MODS[Plug-in Diagnostic Modules]

• Poster lists AC 100–240 V, 50/60 Hz input.
• Architecture decision: use an internal, certified, isolated AC-DC mains module as a separate replaceable assembly.
• The main PCB must remain SELV low-voltage only. It receives isolated DC from the mains module through a DC connector and must not route live/neutral mains copper.
• The AC inlet, fuse, switch, earth bonding, line filter, and AC-DC module primary wiring belong on the isolated mains module / wiring harness, not on the logic or programmable-output PCB.
• Recommended module class: enclosed or chassis-mount isolated AC-DC supply, universal input, protective earth connection, safety approvals, output around 36 V DC, power rating >= 360 W.

• Target output: 0.2–30 V, 0–10 A, max 320 W.
• Requires precision current and voltage regulation, current limiting, thermal monitoring, and output enable control.
• Needs low-ohmic current sense, high-current layout, heat sinking, and calibration support.

• Voltage/current/power measurement with real-time UI display.
• Current range should cover low-current phone-board diagnostics and high-current load testing.
• Thermal sensors should monitor power stage, enclosure air, and possibly output connectors.

• Raspberry Pi 5 is selected as the embedded Linux SBC for UI, database logic, networking, and high-level system orchestration.
• 4.3 inch color touchscreen target from poster.
• Needs firmware update path and persistent calibration storage.

• Teensy 4.1 is selected as the dedicated real-time controller.
• Responsibilities: high-speed ADC sampling, output voltage/current metrics, battery data protocol reading, custom buck control, fast fault handling, and watchdog behavior independent of Linux.
• Teensy must be able to disable the output without Raspberry Pi involvement.

• USB Power Delivery: PD2.0 / PD3.0 / PPS
• Qualcomm Quick Charge: QC2.0 / QC3.0 / QC4+
• SCP / FCP / AFC
• VOOC / DASH / WARP
• PE / BC1.2 / Apple 2.4A
• Samsung AFC / MTK PE+

• Expansion board interface for battery, display, vibrator/sensor, data, chip read/write, and charging test modules.
• Needs keyed connector, hot-plug detection, power limiting, ESD protection, and module identification.

• Internal AC input only through a separate certified isolated mains module / harness.
• Isolated DC bus input to main PCB, nominal target 36 V DC, sized for at least 10 A continuous plus margin.
• Programmable DC output terminals / banana jacks.
• USB-C / protocol test port.
• Lightning and Micro USB support may require licensed or user-supplied adapters.
• Expansion module connector.
• Raspberry Pi 5 to Teensy 4.1 internal communication link: USB serial or dedicated 3.3 V UART.
• Touchscreen UI.
• USB-C service/update port.
• Optional network interface for cloud updates/storage.

• Bench-powered device; no internal runtime target unless a battery backup is added.
• Input from poster: AC 100–240 V, 50/60 Hz.
• Output: 0.2–30 V, 0–10 A, 320 W max.
• Internal auxiliary rails likely required: 12 V fans/relays, 5 V USB/peripherals, 3.3 V logic.
• Dedicated 5V_PI rail: 5.1 V nominal, 5 A continuous target for Raspberry Pi 5.
• Separate clean 5V_CTRL rail for Teensy 4.1, ADC, references, and low-noise control electronics.

• High-current PCB design with wide copper, thermal vias, and connector current ratings appropriate for >10 A DC bus current.
• No mains traces on the main PCB. Maintain physical separation between the mains module and SELV electronics.
• The mains module/harness still needs professional safety review: earth bonding, strain relief, fusing, insulation, creepage/clearance, enclosure fire rating, and accessible-metal grounding.
• Consider a 4-layer board minimum for control electronics; power stage may need heavier copper or a separate module.
• Include test points for all rails, current sense nodes, output voltage sense, programming/debug, and expansion power.

• Output setpoint control for voltage and current.
• Raspberry Pi 5 sends validated setpoint commands to Teensy 4.1; Teensy enforces local safety limits.
• ADC sampling for voltage, current, temperature, and module status.
• Pi-to-Teensy protocol must use framed packets with sequence number and CRC.
• Teensy must implement heartbeat/watchdog timeout and local fault latching.
• Touchscreen UI rendering and event handling.
• Calibration storage and calibration workflow.
• USB-C PD / fast-charge protocol control and detection.
• Expansion module identification and hot-plug management.
• Protection-event logging and fault recovery.

• 220 mm x 130 mm x 90 mm
• 4.3 inch color touchscreen
• Front panel with output connectors, controls, and display.
• Enclosure requires ventilation and thermal design for 320 W operation.
• Layout planning must reserve separate zones for mains module, high-power buck stage, analog measurement, Teensy real-time control, Raspberry Pi/UI, and external protocol connectors.

• Treat the uploaded poster as a concept reference, not a finished engineering specification.
• Use a separate certified isolated AC-DC module internally; do not implement the offline flyback/PFC stage on the main PCB.
• Main PCB begins at isolated 36 V DC input and contains programmable DC output regulation, sensing, control, UI, protocol, and module expansion.
• Use Raspberry Pi 5 as master SBC and Teensy 4.1 as real-time controller.
• Hold connector placement until Pi/Teensy module form factor, communication link, touchscreen type, and power-entry method are confirmed.
• Separate high-current regulation, logic/UI, and protocol/module sections for safety, noise, and maintainability.

• The user wants to capture/design a similar diagnostic station concept from the image.
• No exact mechanical CAD, compliance target, or detailed protocol implementation has been provided yet.
• Assumed isolated DC bus voltage is 36 V nominal so the programmable buck can generate up to 30 V output with headroom.
• Assumed the AC-DC module is purchased/certified rather than designed from raw mains.
• Assumed Raspberry Pi 5 and Teensy 4.1 are stock modules unless the user confirms custom integrated circuitry.

• Initial specification created from uploaded product poster.
• Project renamed from random draft name to VoltiX Pro 320 Concept.
• User selected internal AC-DC version with mains isolated on a separate module; main PCB remains SELV low-voltage only.
• User upgraded control architecture to Raspberry Pi 5 master SBC plus Teensy 4.1 real-time hardware controller; connector placement paused pending clarification.