Capacitors (NEC PC Engine Duo-R) Updated Apr 18, 2026 · 15 min read · Support · 0 viewing 🔥 Most active page right now Previous 📄 NEC PC Engine Duo-R Next Power Up Basics (NEC PC Engine Duo-R) The PC Engine Duo-R has a DC 9V (4.8mm x 1.7mm) center positive power supply. To power from the benc...