Update: It appears this entire project is no longer necessary. When I did this a few months ago, no one was offering an intervalometer for the Sony Multi-Terminal port. Now it appears there are some out there: http://goo.gl/Iy4zMJ
One weakness of the Sony a7/a7r/a7s and a6000 ecosystems is the lack of an intervalometer. There are a few options like TriggerTrap, but that and some others depend on a mobile phone, which seems unnecessarily complex and unreliable. There are a number of videos and articles demonstrating how to combine a Sony remote and an inexpensive intervalometer, but they don’t provide enough detail for those who don’t want to experiment. Here are the step-by-step instructions.
1. Get the parts.
I used a Sony RM-VPR1 wired remote and this intervalometer. You’ll also need some two-conductor narrow gauge wire (~22 gauge works), a soldering iron, and optionally a connector if you want to be able to use the remote without the intervalometer attached.
(Not shown: the cable that connects the Sony remote to the camera.)
2. Disassemble the remote.
Four external screws and one that secures the circuit board to the case.
3. Cut a notch for the wire.
Use a small knife or drill to cut a notch into the rear of the remote’s case for the wire to pass through.
4. Solder the wire to the remote’s switch.
Solder the two-conductor wire to the remote’s main switch as shown above. (Click to enlarge.)
5. Cut the connector off of the intervalometer.
I left about 8″ of wire coming out of the intervalometer.
6. Use a connector to mate the intervalometer to the remote.
As shown above, the wire connected to point A should mate with the white wire coming out of the intervalometer. Point B should mate with the intervalometer’s yellow wire. (Polarity matters!) The intervalometer’s red wire is unused.
I used a 3-conductor molex connector as shown above. Because I keep the two components connected all the time, I’ve secured the connector using cable ties as shown earlier.
Connect the remote to the camera. Both the remote and the intervalometer should be able to trigger the shutter. Don’t forget to enable the remote in the camera’s menus.
8. Reassemble the remote.
Route the wire through the remote as shown below. This will act as strain relief and won’t interfere with the operation of the remote’s buttons.
That’s all there is. You should now have all of the intervalometer’s functions as well as the original functions of the Sony remote.