The chart below lists pins for the ILDA DB-25F female connector. This connector conforms to the ILDA DB-25 connector standard. The ILDA standard uses differential signals for projector inputs, primarily because they are more immune to noise. For example, you will see X+ and X- signals defined below. The positive indicates a normal signal; the negative indicates an inverted signal. Projectors also use differential signals for color signals as well, but generally outputs only single-ended OUTPUT signals for colors. This is allowed by the ILDA Standard.
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ILDA DB25 connector |
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| Signal name |
Pin |
Notes |
| X+ | 1 | -5V to +5V |
| Y+ | 2 | -5V to +5V |
| Intensity/Blanking + | 3 | 0V to +2.5V |
| Interlock A | 4 | Connected to pin 17 inside the QM2000 |
| R+ | 5 | Red, 0V to +5V |
| G+ | 6 | Green, 0V to +5V |
| B+ | 7 | Blue (typically 476 nm), 0V to +5V |
| Deep blue + | 8 | Violet (typically 457 nm), 0V to +5V |
| Yellow + | 9 | Yellow, 0V to +5V |
| Cyan + | 10 | Brightest blue (usually 488 nm cyan), 0V to +5V |
| Z+ | 11 | Depth Z (not intensity), -5V to +5V |
| Not connected | 12 | |
| Shutter | 13 | 0V to +5V (referenced to Ground pin 25) |
| X- | 14 | -5V to +5V |
| Y- | 15 | -5V to +5V |
| Intensity/Blanking - | 16 | Connected to Ground pin 25 |
| Interlock B | 17 | Connected to pin 4 inside the QM2000 |
| R- | 18 | Connected to Ground pin 25 |
| G- | 19 | Connected to Ground pin 25 |
| B- | 20 | Connected to Ground pin 25 |
| Deep blue - | 21 | Connected to Ground pin 25 |
| Yellow - | 22 | Connected to Ground pin 25 |
| Cyan - | 23 | Connected to Ground pin 25 |
| Z- | 24 | -5 to +5V |
| Ground | 25 | |
Note on interlock lines A and B
The purpose of the two interlock lines is so that a projector can tell when it is properly connected to an ILDA-compatible signal source. The projector will put a current or signal into pin 4. The same current or signal should be present back at the projector when reading pin 17.