Knex Time-lapse intervalometer

Step 3 Gear System and Cam

This part is what pushes the rocker up. Its very important that you put the right number of spacers in.

1: Build this, but be prepared to change where the white rod is if you find the cam doesnt work properly.

2: Clip it onto a red rod in the frame

3: Add the red gear

4: The cam

5: Where it goes

6: This is how the end of the rocker arm should fit onto the cam.


At this stage, you want to test that the cam works. Put the camera in and turn it on. Now, turn the red gear anticlockwise slowly. The cam should lift up, pushing the rocker up and hopefully taking a shot. If you continue to turn the cam, the rocker should snap back down. Keep turning it a few times to make sure it works.

If it doesnt work, then again its up to you to adjust it until it does. The main thing is where the white rod is connected to the grey connectors in photo 1. Try moving it to the next connector point, so its effectively one of the 90 degree red connectors.



7,8,9,10: Keep building the frame as shown.