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    I have an electronics/engineering question!?

    I have to make something in concept form first and eventually at the end of the semester build one. This is the just of the "problem" Two objects: Object S is Stationary Object M is Moving -M is approaching S -When M is 15cm from S a light must be activated on S How would I build this... (If...
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    I have a electronics questions, a fairly hard one.?

    Alright, I have a electronics question. I need to make something that is in two parts, as object A gets closer to object B, I light comes on on either, but not both. Another way to explain it... Object A is moving towards stationary object B. When object object A gets "within range" (say...
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    What to dow with new puppy and bicycle?!?

    Turn the bike upside down - the handle and seat touch the floor and the chain is quite a bit higher
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