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  <title>Ertunç Özbay — Embedded Systems, Hardware Lab &amp; Open-Source Projects</title>
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          Ertunç Özbay
          <span class="brand-subtitle">embedded // hardware // open-source</span>
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        <span class="workshop-eyebrow">⚡ ELECTRICAL &amp; ELECTRONICS ENGINEERING // OPEN WORKBENCH</span>
        <h1 id="hero-heading"><span class="gradient-title">Hi, I’m Ertunç Özbay.</span></h1>
        <p class="hero-lead">
          I design embedded hardware, write bare-metal C &amp; FreeRTOS firmware, and build open-source systems from the transistor level up to Linux desktop tooling.
        </p>
        <p class="reading-width">
          Welcome to my engineering studio and notebook. Here I document my real hardware prototypes—from an <strong>ESP32-S3 2.4 GHz Multi-Functional RC Console</strong> and a <strong>Dual-Core ESP32 16-Track MIDI Synthesizer</strong> to a <strong>4WD Autonomous Vehicle</strong> and a <strong>Standalone Linux Game Launcher written in Rust</strong>.
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          <a class="btn btn-primary" href="projects/index.html">🚀 Explore All 4 Projects</a>
          <a class="btn btn-cyan" href="https://github.com/ertunc-ozbay" rel="noopener noreferrer">💻 GitHub (@ertunc-ozbay)</a>
          <a class="btn btn-secondary" href="contact.html">✉️ Contact &amp; Gmail</a>
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        <div class="stats-strip" aria-label="Workshop highlights">
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            <span class="stat-value">4 Active Builds</span>
            <span class="stat-label">ESP32-S3, ESP32, 4WD RC &amp; Linux/Rust</span>
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          <div class="stat-pill">
            <span class="stat-value">ESP-IDF v5.2.2</span>
            <span class="stat-label">ISO C99, Dual-Core FreeRTOS &amp; KiCad</span>
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          <div class="stat-pill">
            <span class="stat-value">16-Track Synth</span>
            <span class="stat-label">Custom Python RLE MIDI-to-C Compiler</span>
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          <div class="stat-pill">
            <span class="stat-value">Open Source</span>
            <span class="stat-label">Schematics, Firmware &amp; Build Logs</span>
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      <section class="section-block" aria-labelledby="active-builds-heading">
        <div class="section-header">
          <div>
            <span class="section-label">01 // Featured Hardware &amp; Software Builds</span>
            <h2 id="active-builds-heading">Projects on My Bench</h2>
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          <a href="projects/index.html">View full specifications &amp; PoC video slots →</a>
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          <!-- Project 1 -->
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                <span class="badge badge-progress">Hardware Rev 0.1 → Phase 2 Console</span>
                <span>ESP32-S3 • 2.4 GHz RF</span>
              </div>
              <h3><a href="projects/multi-functional-controller.html">Multi-Functional RC Controller (MFC)</a></h3>
              <p>
                A handheld 2.4 GHz wireless transmitter and embedded control console powered by an <strong>ESP32-S3-N16R8</strong> (16 MB Flash / 8 MB Octal PSRAM), <strong>nRF24L01+ PA+LNA</strong> RF transceiver, dual <strong>K-Silver Hall-effect gimbals</strong>, and shared SPI2 <strong>1.3" ST7789 IPS TFT + MicroSD</strong> bus.
              </p>
              <ul class="tag-list" aria-label="Technologies">
                <li><span class="tag tag-esp">ESP32-S3-N16R8</span></li>
                <li><span class="tag tag-c">ESP-IDF C99</span></li>
                <li><span class="tag tag-hw">nRF24L01+ 2.4GHz</span></li>
                <li><span class="tag tag-hw">KiCad Schematic</span></li>
              </ul>
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            <div class="card-actions">
              <a class="btn btn-primary" href="projects/multi-functional-controller.html">Project Page &amp; PoC Video</a>
              <a class="btn btn-secondary" href="https://github.com/ertunc-ozbay/multi-functional-controller" rel="noopener noreferrer">GitHub Repo</a>
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          <!-- Project 2 -->
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                <span class="badge badge-experimental">Active Prototype</span>
                <span>Dual-Core ESP32 • Audio &amp; UI</span>
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              <h3><a href="projects/midi-breadboard-instrument.html">MIDI Breadboard Instrument (Desk Rave 16-Track Symphony)</a></h3>
              <p>
                A standalone dual-core <strong>ESP32 MIDI synthesizer, drum sequencer, and 30 FPS SPI OLED visualizer</strong> with a custom <strong>Python RLE MIDI-to-C compiler</strong> (<code>midi_to_c.py</code>), hardware PCNT rotary encoder, passive melody piezo, and dual active drum buzzers.
              </p>
              <ul class="tag-list" aria-label="Technologies">
                <li><span class="tag tag-esp">ESP32 Dual-Core</span></li>
                <li><span class="tag tag-python">Python RLE Compiler</span></li>
                <li><span class="tag tag-synth">30 FPS SPI OLED</span></li>
                <li><span class="tag tag-c">FreeRTOS IPC</span></li>
              </ul>
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            <div class="card-actions">
              <a class="btn btn-primary" href="projects/midi-breadboard-instrument.html">Project Page &amp; PoC Video</a>
              <a class="btn btn-secondary" href="https://github.com/ertunc-ozbay/midi-breadboard-instrument" rel="noopener noreferrer">GitHub Repo</a>
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          </article>

          <!-- Project 3 -->
          <article class="card card-emerald">
            <div class="card-top">
              <div class="card-meta">
                <span class="badge badge-active">In Development</span>
                <span>Robotics • Control Logic</span>
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              <h3><a href="projects/rc-autonomous-vehicle.html">RC and Autonomous 4WD Vehicle</a></h3>
              <p>
                A companion 4WD robotic vehicle platform designed to pair with the 2.4 GHz Multi-Functional Controller while exploring closed-loop motor control, telemetry feedback, and autonomous obstacle-avoidance logic.
              </p>
              <ul class="tag-list" aria-label="Technologies">
                <li><span class="tag tag-hw">4WD Robotics</span></li>
                <li><span class="tag tag-c">Embedded Control</span></li>
                <li><span class="tag tag-esp">2.4 GHz Telemetry</span></li>
              </ul>
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            <div class="card-actions">
              <a class="btn btn-primary" href="projects/rc-autonomous-vehicle.html">Project Page &amp; PoC Video</a>
            </div>
          </article>

          <!-- Project 4 -->
          <article class="card card-coral">
            <div class="card-top">
              <div class="card-meta">
                <span class="badge badge-coral">v1.0.0 Released</span>
                <span>Rust • Linux Systems &amp; Wine</span>
              </div>
              <h3><a href="projects/pointblank-linux.html">Point Blank on Linux — Standalone Community Launcher</a></h3>
              <p>
                An all-in-one standalone Linux desktop launcher written in <strong>Rust</strong> that runs Point Blank (Zepetto / TAM) on Linux with 100% unmodified official CheatBlocker anti-cheat, automated Wine prefix provisioning, and DirectX 9 / DirectX 11 support.
              </p>
              <ul class="tag-list" aria-label="Technologies">
                <li><span class="tag tag-rust">Rust</span></li>
                <li><span class="tag tag-c">Wine / DirectX 11</span></li>
                <li><span class="tag tag-python">Linux Desktop</span></li>
              </ul>
            </div>
            <div class="card-actions">
              <a class="btn btn-primary" href="projects/pointblank-linux.html">Project Page &amp; PoC Video</a>
              <a class="btn btn-secondary" href="https://github.com/ertunc-ozbay/pointblank-linux" rel="noopener noreferrer">GitHub Repo</a>
            </div>
          </article>
        </div>
      </section>

      <section class="section-block" aria-labelledby="workshop-areas-heading">
        <div class="section-header">
          <div>
            <span class="section-label">02 // Inside This Studio</span>
            <h2 id="workshop-areas-heading">How I Approach Engineering</h2>
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        </div>

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          <div class="card card-amber">
            <div class="card-top">
              <span class="section-label">Hardware + Software</span>
              <h3>Understanding the Whole Stack</h3>
              <p>
                From decoupling capacitors, BJT switches, and SPI bus arbitration up to FreeRTOS tasks and Python/Rust tooling—I study how every layer connects so I can take full ownership of what I build.
              </p>
            </div>
            <a href="about.html">Read my engineering philosophy →</a>
          </div>

          <div class="card card-synth">
            <div class="card-top">
              <span class="section-label">Lab &amp; Bench Notes</span>
              <h3>The Open Workbench</h3>
              <p>
                Explore my active breadboard tests, RLE MIDI-to-C compression algorithms, hardware protection fixes, and reverse-engineering study notes.
              </p>
            </div>
            <a href="lab.html">Open the Lab Notebook →</a>
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          <div class="card card-emerald">
            <div class="card-top">
              <span class="section-label">Direct Contact</span>
              <h3>Collaborate &amp; Connect</h3>
              <p>
                Reach out directly via Gmail (<code>ertuncozbayh@gmail.com</code>), Outlook, LinkedIn, or GitHub to discuss embedded systems, electronics, or open-source builds.
              </p>
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            <a href="contact.html">View Contact &amp; Email Details →</a>
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