IoT Datalogger PCB Design

  • Status: Closed
  • Prize: $220
  • Entries Received: 15
  • Winner: engrusmanfaiz

Contest Brief

I have a new IoT datalogger concept and need a full-fledged PCB layout that is ready to send straight to fabrication. The schematic is not fixed yet, so I’m relying on your board-level expertise to translate high-level requirements into a clean, production-ready design.

What I already know
• Form factor: credit-card sized (roughly 85 × 55 mm, single board).
• Core: a low-power MCU or module capable of handling multiple digital and analog inputs.
• Future-proofing: headers or pads for common temperature, humidity, and pressure sensors as well as optional wireless modules (Wi-Fi, Bluetooth, or cellular—final choice can be discussed once power budget is clear).
• Power: ability to accept both rechargeable battery input and external DC (buck/boost circuitry with reverse-polarity protection and battery charging IC).

What I need from you
1. Schematic capture: component selection with clear reasoning, part numbers, and footprints readily available from mainstream fabs (JLCPCB, PCBWay, etc.).
2. PCB layout: 2-layer preferred; 4-layer if routing or RF performance makes it significantly cleaner.
3. Deliverables: source files (Altium, KiCad, or Eagle), Gerbers, BOM with supplier links, pick-and-place, and a simple assembly drawing.
4. Basic design review session (video or detailed notes) so I understand key decisions and can iterate quickly.

Acceptance criteria
• All nets pass ERC/DRC with default manufacturer rules.
• Routing maintains 6 mil/6 mil or better; impedance-controlled traces clearly marked.
• Test points for firmware flashing and key signal debugging are accessible.
• Board boots on first spin with power and comms verified on bench (mock sensor loads are fine).

If you are comfortable juggling power management, sensor front-ends, and wireless considerations in a compact layout, let’s move forward. I’m ready to share concept sketches and any additional details you need right after kickoff.

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Public Clarification Board

  • jimsufficiency
    jimsufficiency
    • 1 month ago

    Also, could you explain why the two ESP32s are connected wirelessly if they are on the same board, or perhaps are they physically different PCBs?
    #increaseprize #extended

    • 1 month ago
  • Goutam895
    Goutam895
    • 1 month ago

    Hello Contest Holder,
    I can see that several AI-generated entries have already been uploaded above. I have carefully reviewed your brief and fully understand all of your requirements for the **IoT datalogger PCB design**.

    I’m confident I can create a completely original and professional **schematic and production-ready PCB layout** that meets your form factor, power management, and sensor integration needs. I just need a little more information to ensure everything is perfectly aligned before starting.

    Looking forward to your message.

    • 1 month ago
  • jimsufficiency
    jimsufficiency
    • 1 month ago

    Hi, are you going with WiFi and bluetooth as a minimum wireless feature for this board?

    • 1 month ago

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