sam-4screen-desktop 2026-7-7:22:13:52
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.obsidian/workspace.json
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18
.trash/Untitled 9.md
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.trash/Untitled 9.md
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# Daily_Note_Template
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⏪ [[Invalid date]] | 📅 [[Invalid date-WInvalid date]] | ⏩ [[Invalid date]]
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## 🎯 Focus Areas
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- [ ]
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- [ ]
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- [ ]
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## 🪵 Timeline Log
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* **21:08** -
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## 📝 Quick Captures & Thoughts
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-
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## 📊 Daily Review
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* **Accomplishments:**
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* **Friction points:**
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* **Improvements for tomorrow:**
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77
200 projects/260 Build Create Make/Digital Binoculars.md
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200 projects/260 Build Create Make/Digital Binoculars.md
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---
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created: 2026-07-07 22:05
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modified: 2026-07-07 22:05
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type: note
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tags:
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- business
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aliases: []
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---
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# [[Digital Binoculars]]
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# DIY Face-Mounted Digital HDMI Viewfinder (Obsidian Technical Note)
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- **Date:** 2026-07-07
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- **Project Type:** Hardware Fabrication / Near-to-Eye (NTE) Display Assembly
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- **Objective:** Create a direct, zero-latency digital viewfinder using a 2K LCD screen over HDMI from a digital camera with optical zoom, bypassing all wireless hardware.
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---
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## 🛠️ Step 1: Optical Procurement (AliExpress)
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Do not use basic magnifying glasses or generic Google Cardboard lenses. A high-density 2K display requires specialized optics to prevent warping and extreme chromatic aberration.
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### AliExpress Search Targets
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* **Search Query 1:** `50mm Aspheric PMMA Lens FPV`
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* **Search Query 2:** `40mm Bi-Convex VR Lens`
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* **Search Query 3:** `Phone VR Headset Replacement Lenses`
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### Optical Specifications Needed
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* **Lens Material:** Aspheric or Bi-Convex PMMA (acrylic) or optical glass. Aspheric is highly preferred for 2K resolution to keep edge-to-edge clarity sharp.
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* **Target Focal Length:** Between **45mm and 60mm**. This keeps the physical depth of your 3D-printed housing short, shallow, and lightweight on your face.
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---
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## 📐 Step 2: Open-Source CAD Data Selection
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Instead of designing a facial interface and optical box from scratch, leverage established open-source CAD repositories and upload the `.STL` or `.STEP` files directly to a fabrication service like **PCBWay** or **JLCPCB**.
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### Top Repository Recommendations
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1. **The "Relativity VR" / DIY_VR Platform (Recommended for Makers)**
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* **Source:** Search GitHub for the `dmcke5 DIY_VR` repository.
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* **Why it fits:** It is an open-source project explicitly designed for makers building low-cost, high-resolution HDMI headsets using AliExpress screens. The "Eyebox" pieces are engineered to mount dual lenses at an exact sliding focal distance right in front of compact LCD panels.
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2. **The OpenIPC "PixelPilot" Shell**
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* **Source:** Search Printables or Thingiverse for `OpenIPC PixelPilot Goggle Body`.
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* **Why it fits:** This is a field-tested, modern shell designed to hold small, high-density displays. It includes mechanical sliders so you can adjust your **IPD (Interpupillary Distance)** manually.
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---
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## 🏭 Step 3: Manufacturing Configuration (PCBWay / JLCPCB)
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When configuring your order on a 3D printing platform, use these specific parameters to ensure the build survives active use:
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| Component / Section | Recommended Material | Print Technology | Reason |
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| :--- | :--- | :--- | :--- |
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| **Main Goggle Body / Face Plate** | **Nylon (PA12)** or **PETG** | **SLS** (Selective Laser Sintering) | Provides durable, impact-resistant structures that won't warp under outdoor heat. |
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| **Internal Lens Holders & Mounts** | **Matte Black Resin** or **Matte PLA** | **SLA** (Stereolithography) or FDM | **Crucial:** Matte black prevents internal light bounce and reflections into your eyes. |
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---
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## 🔌 Step 4: Hardware Architecture & Wiring Pipeline
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Because you are bypassing wireless modules entirely, your minimal hardware pipeline is streamlined for zero latency:
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[Digital Camera]│ (Clean HDMI Output @ 60fps)▼[Flexible HDMI Cable]│▼[Display Driver Board (Mounted to Shell/Strap)]│ (FPC Ribbon Cable)▼[2K LCD Screen] ───> [Aspheric Lenses] ───> [User Eyes]
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### Critical Rules for the Build
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1. **Clean HDMI Output:** Ensure your camera supports "Clean HDMI" (sends the video feed without on-screen battery icons or menu text).
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2. **The Diopter Constraint:** You cannot look directly at micro-displays without optics. The shell must house your sourced lenses at an exact distance matching their focal length ($f \approx d_o$) so your eyes can focus effortlessly.
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3. **Power Delivery:** Tie a portable USB power bank to the display driver board via a simple USB-C cable or 5V DC step-down regulator.
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---
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## 📋 Next Steps / Missing Data
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```dataview
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TABLE Screen_Size, Camera_Model WHERE project = "DIY-HMD"
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```
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*Note: Once you know the exact diagonal size of your 2K screen (e.g., 2.9-inch dual screens vs. 5.5-inch single screen), you can download the exact 3D variant that matches your panel dimensions.*
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