🎮 OpenTendo (Modern NES Recreation)
Status: In Progress
Type: Custom Console Hardware Build
Base Design: OpenTendo OSHW (by Redherring32)
Build by: Eric Flesher
🔧 Overview
The OpenTendo project is a modern hardware recreation of the iconic 1985 front-loading Nintendo Entertainment System. Based on open-source hardware (OSHW) schematics created by a developer known as Redherring32, this project revives the original NES motherboard with a modern DIY twist — while leaving room for serious upgrades.
🔩 The Build
Rather than fabricate the board myself, I purchased a pre-made OpenTendo PCB on eBay. The board came with a full kit of components — resistors, capacitors, connectors — and most of the required microchips already included. However, the CPU and RAM chips are proprietary to Nintendo and must be salvaged from a real NES.
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Board: Open-source NES PCB (Redherring32 design)
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Components: Included in kit
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CPU/RAM: Harvested from a donor NES
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Assembly: Full through-hole soldering required
🧠 Upgrade Plans
A working NES is great — but I don’t just want a functional throwback. I want a modernized, enhanced NES that preserves the soul of the original while embracing today’s tech. That means:
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HDMI video and enhanced audio output for modern displays
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Bluetooth controller support for wireless play
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Improved cartridge slot mechanism for better connection and game reliability
These upgrades are in the planning stage — nothing purchased yet — but they’re part of the long-term roadmap for this build.
⚙️ Current Progress
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✅ Board acquired
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✅ Components acquired
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✅ CPU/RAM sourced from original NES
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🔲 Full assembly/soldering pending
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🔲 HDMI, Bluetooth, and slot upgrades pending
💬 Notes from Eric
I’ve always loved retro consoles, and this project brings together two of my biggest passions: classic gaming and modern electronics. OpenTendo isn’t just about nostalgia — it’s about building something better from the ground up, learning along the way, and giving the NES the treatment it deserves.
More updates coming soon as I begin assembly and explore upgrade options.