| Electronics > Beginners |
| What is the part marked with a 205? |
| (1/1) |
| fixit7:
What is the yellow part with the 205 on it? The whole circuit is the detector part of a laser alarm. The alarm goes off if the laser beam is interrupted. https://www.dropbox.com/s/esho9ia2oj3mbnz/Laser_Detector_Circuit.png?dl=0 https://www.dropbox.com/s/i5g3qrd5s09mfqa/Laser_Detector_Circuit2.png?dl=0 The photo detector is an awful small surface to have to aim the laser at. If possible, I would like a photo detector with a larger area. It works inside, but I have not tested it yet on my patio where the ambient light is much brighter. Thanks. |
| Nerull:
A 2 meg trimpot. |
| james_s:
If you need a larger area for the detector, use a lens, if you can find a small Fresnel magnifier that should work well. Keep in mind the larger your detection area, the more sensitive it will be to ambient light too. |
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