2014-09-19 (F) Rotational Photography Rig

An inexpensive bluetooth remote to control camera shutters in Android and iOS devices was open-end to test it as a shutter controller for the rig. The switches were tested to verity correct terminals and that they were NO (normally open) switches. A reed switch was soldered to two pieces of 26AWG and 1/8" (3mm) heat shrink (2:1) buying was selected. The tubing was put over the ends of the reed switch which left the middle exposed. The gap was aesthetic and not done for any functional reason.

 Testing switch in remote module

Reed switch with wires and shrink tubing

Reed switch next to remote module

The reed switch was hot glued to the lanyard strap hole of the bluetooth remote for stability and durability. The leads were trimmed and soldered to the switch terminals which controlled the shutter on Android devices. The top of the case was filed down to allow the wires to pass through. The case halves were rejoined and the unit fully closed. The reed switch was tested by connecting the unit to the iPad and holding the finger magnet near the switches. This was successful and noticed by the light activated on the remote and the effect of changing the volume on the iPad.

 Reed switch glue to case

One wire soldered to switch

Wires soldered in place

An on-off latching switch was soldered into the line side of the 120VAC gear motor and the common lead was soldered to the common lead of a 120VAC plug purchased from a surplus store. The switch was not vital since the motor can be unplugged to stop operation. A video was made to show the operation. The remote was able to read each magnet passing but it was too fast for the camera to take pictures at full resolution. Four of the eight magnets were removed to correct for speed. The number of pictures taken was halved.

 Successfully testing reed switch with implanted magnet

Motor with switch soldered inline

Video showing speed of motor and magnetic triggering

The tension between the wheel and rotating platform was not stable by only resting the two next to one another. A long rubber band was combined with some string. The rubber band was wrapped around the gear motor and the string was tucked under the base of the rotating platform to keep it from moving. A video was made of the platform revolving continuously and the magnets reliably triggering the remove. A demonstration of the rig was made. The result was unsatisfactory because of the large gap between pictures so the rotation did not appear smooth.

 String and rubber band keeping tension

First attempt at automated rotational photography

To do:

  • Replace tensioning string with cloth
  • Find smaller wheel
  • Adhere magnets to wheel
  • Attach smaller magnet wheel to motor

 Journal page 1

Journal Page 2

The rest of the posts for this project have been arranged by date.

A list showing of all the final posts of COMPLETED projects.

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