Okay so Ive been a little slack with keeping the blog up to date, So heres a couple of videos the Jenni filmed of the circuits Ive been working on.
In the first clip, I started off simply using a photocell and a transistor to try and produce the desired effect of the light activating when the laser beam is disrupted. The circuit worked fairly well, however even when the beam was uninterupted the light still illuminated slightly, and when an alarm was attached, it could still be faintly heard.
I experimented using various levels of resistance on the light/ buzzer to try and fix this but couldnt really eliminate it, So i decided to try using the arduino. I hooked up a simple single photocell circuit and using my new found coding abilities (Thanks 285) I managed to get the circuit working perfectly, and was even able to adjust it depending on lighting conditions.
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