The following pinouts are used in the MC-DC1 connector (connections from left to right when looking into connector):
1 2 3 4
- Pin 1 — ?
- Pin 2 — Shutter Release fully pressed (shorts to ground)
- Pin 3 — Shutter Release partially pressed (shorts to ground)
- Pin 4 — Ground
The D70s and D80 use this connector.
This information is not verified, nor it it certified by Nikon. Use at your own risk.