SHOWALL FUN PRANKS HIGH VOLTAGE LAZARUS-64 PHOTOGRAPHY SPY GADGETS VIDEO GAME
Figure 6 - This is the relay driver board that safely controls the camera functions
Figure 6 - This is the relay driver board that safely controls the camera functions

The relay drive board is shown in Figure 6. This is a previous project called the "Camera Trigger Hack". The idea behind the relays is that no voltage is sent to the camera, only the closing of a circuit, which emulates exactly the function of the original shutter release switch that has been hacked out of the camera. Since most digital cameras have a two position shutter release switch (focus and shoot), there are two relays used to copy this operation. You could get away with only one connection to the shoot function, but at the expense of having fast moving targets possibly out of focus.



Figure 7 - The timer circuit is built on another small perforated board
Figure 7 - The timer circuit is built on another small perforated board

Once I had the timer working at a rate I was happy with, I added the six components on a small piece of perforated board and made the connections on the underside using some small wire. A circuit of this size hardly merits a real printed circuit board, and it only took a few minutes to move the parts from the solderless breadboard onto the perf board and then solder the wires to form traces. I decided to keep the relay board separate as it may end up being connected to some other activation circuit in a future project.

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