Public Lab Wiki documentation


Dual camera kit electronics

This is a revision from April 30, 2012 22:16. View all revisions
2 | 22 | | #1796

Introduction

To get the cameras to trigger simultaneously, we chose to trigger them via USB using a feature of the CHDK.

Dual camera 555 trigger

Assembling the 555 circuit

  • Pretty good instructions come in the 555 timer package
  • Potentiometer confusion
  • Stripping and attaching the USB cables

Dual camera 555 trigger

Battery "hack"

Connecting the batteries

5 coin cell batteries + 1 screw fit in the holder Place them inside one by one Four should fit snugly and securely
  • 2 different batteries needed: 12v and 5.5v or more
  • Fitting cell batteries into N-type holder (hack)
  • Attaching to the 555 timer (extra wire)

Splicing USB cables

Image dump:

Snip the USB cable to at least 8 inches long Separate out the wires from the wrapping

Snip off all but red and black; strip off their wrapping

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