Monday, December 26, 2011

Laser trigger for high speed flash photography, part 3

Success!  I taped over the photo-resistor with a piece of paper to reduce the area of exposure to the laser beam.  Effectively, I reduced the part of the laser beam that matters so that a water droplet could easily break the laser beam.

Also, the ORgate1 loop in the schematic is not needed.  There is no need to keep pulling the voltage high after the initial flash trigger, so I removed the loop.  The flash goes off fine without the loop.

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Invasion of What?

What are these bugs? I've never seen them before. I saw them at my parents' place the other day. Lots of them in soil or grassy areas.