🧩🔌 MDIN-3 • MDIN-3 Cable

This cable uses the 3‑pin Mini DIN format — a small, round connector with three metal pins arranged in a curved arc. Though rare today, it was once common for low‑voltage control signals, serial data, and proprietary device links. Available in male/male and male/female configurations, it’s used for patching, extension, and direct device interfacing in legacy setups.
 
🔧 Connector Form
Mini DIN 3‑pin male → Mini DIN 3‑pin female (used for extension or panel access)
Circular metal shell with plastic key notch for alignment
Three pins in a curved arc — not in-line or symmetrical
Typically shielded for low‑noise signal transmission
Molded or panel‑mount connectors depending on application
 
🖥️ Compatible Devices
🖥️ Legacy computer peripherals (e.g., early serial mice, control pads)
🎛️ Industrial and lab equipment with Mini DIN control ports
📡 Proprietary AV gear with sync or trigger interfaces
🧪 Embedded systems and microcontroller boards with Mini DIN headers
 
✅ Common Uses
🔄 Serial communication between legacy devices or control modules
🎚️ Trigger signal routing in lab or automation setups
🧩 Extension of Mini DIN ports via male/female cable
🛠️ Panel access or breakout from embedded Mini DIN jacks
 
🧠 Signal Format
📡 Typically low‑voltage DC or TTL serial signals
🔁 No standardized protocol — varies by manufacturer and device
🧵 Unbalanced signal paths with optional shielding
⚡ May carry power, data, or control depending on pinout
 
⚠️ Things to Watch Out For
🚫 Not interchangeable with other Mini DIN sizes — pin count and spacing differ
🌀 Pinouts are device‑specific — always verify before connecting
📉 Incorrect wiring can damage sensitive control circuits
🔌 Male/female cables may be mistaken for power extensions — label clearly
🧯 Avoid assuming MIDI compatibility — 3‑pin is not MIDI standard
 
🛠️ Quick Tips for Beginners
🧭 Always check device documentation for correct pinout and signal type
🧪 Use a multimeter or breakout board to confirm wiring before deployment
🧵 Label both ends — Mini DIN connectors look similar across pin counts
🔌 Match cable gender to your device ports — male/female for extension, male/male for patching
📚 Keep legacy manuals — online pinout info may be incomplete or conflicting