Interactive Connector Diagram
Click or tap any pin in the diagram below to inspect its signal assignment, electrical specification, and wire colour standard.
Click any pin to view its signal assignment, electrical spec, and wire colour.
Supported Systems / Found On — Retro Machine Hubs
This connector is used on the following retro computer systems. Click any colour-coded badge below to open its full board-level repair, diagnostic, and schematic Machine Hub:
Connector Specifications
Connector Standard
DIN 41524 (5-Pin 180° Standard Circular)
Oric-1 / Atmos
Pin 1=Red, Pin 2=GND, Pin 3=Green, Pin 4=CSYNC, Pin 5=Blue (No +5V pin!)
Dragon 32 / 64
Pin 1=Luma, Pin 2=GND, Pin 3=Audio Out, Pin 4=Composite Video, Pin 5=NC
Full Pin Assignment & Wiring Reference
| Pin | Signal Name | Direction | Electrical Spec / Role | Wire Colour / SCART / Adapter Target |
|---|---|---|---|---|
| 1 | ORIC: RED | DRAGON: LUMA | Out | Oric-1/Atmos: Red Video | Dragon 32/64: Monochrome Luminance | Oric: SCART Pin 15 (Red) |
| 2 | GND (0 V Shield) | GND | Common 0 V Video Ground on BOTH Oric and Dragon | Black / Shield (SCART GND / RCA Shield) |
| 3 | ORIC: GREEN | DRAGON: AUDIO OUT | Out | Oric-1/Atmos: Green Video | Dragon 32/64: Mono Audio Out | Oric: SCART Pin 11 | Dragon: White/Red RCA |
| 4 | ORIC: /CSYNC | DRAGON: COMPOSITE | Out | Oric-1/Atmos: Composite Sync | Dragon 32/64: Composite Video | Oric: SCART Pin 20 | Dragon: Yellow RCA |
| 5 | ORIC: BLUE | DRAGON: NC | Out | Oric-1/Atmos: Blue Video | Dragon 32/64: Unconnected | Oric: SCART Pin 7 (Blue) |
Why Passive Oric RGB SCART Cables Show a Black Screen (And the Easy Fix!)
The 5-pin 180-degree DIN (DIN 41524) is used in two distinct ways across European 8-bit machines: on the Oric-1 and Oric Atmos it carries native 15.6 kHz Red, Green, Blue, and Composite Sync directly from the HCS10017 ULA; on the Dragon 32 and Dragon 64 it carries Composite Video, Luminance, and Mono Audio.
- Oric-1 / Atmos RGB SCART Issue: Because all 5 pins on the Oric's video DIN are occupied by R, G, B, CSYNC, and GND, there is NO +5 V pin on the Oric video socket to drive SCART Pin 16 (RGB Fast Blanking, 1–3 V). Without 1–3 V on SCART Pin 16, your TV ignores R/G/B and displays a black screen!
- Oric SCART Fix #1 (External USB +5 V): Wire a standard USB-A plug's +5 V line through a 150 Ω resistor to SCART Pin 16 (and USB GND to SCART Pin 18).
- Oric SCART Fix #2 (Internal Pin 2 Mod): Bridge a 150 Ω resistor internally from the Oric's +5 V rail to a spare contact or use an active sync-rectifier cable.
- Dragon 32 / 64 Composite Cable: A standard 5-pin Commodore 64 Composite RCA cable (Pin 4 = Yellow Video, Pin 3 = White/Red Audio, Pin 2 = GND) works out-of-the-box on every Dragon 32 and Dragon 64!