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I had a look at reflective opto switches, like this i guess>
https://www.mouser.it/ProductDetail/Optek-TT-Electronics/OPB704WZ/?qs=sGAEpiMZZMvDlz5Naxv8kM6dZ2pUnQRhFywDe%252bbD4rE%3d
or...
Brian, thanks for your reply.
I think I understand your point, would something like the attached modified diagram work, where:
yellow is the sensor, red is led light, cyan is the plastic box, dark grey is opaque coating, light grey is transparent glue, blue is water (right part is outside, left...
Hi everybody, I am not sure if this post follows the guidelines of the forum nor if it is in the right group, I apologize if not.
I have no clue of electronics design (I work on software design) and I need help to solve the following:
I have to build a sort of fingertip keyboard using light...
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