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/diy/ - Do It Yourself

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>> No.1660855 [View]
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1660855

>>1660839
absolutely. currents in parallel add. as long as the phototransistor in question can sink that much current, easy. the IR LED's current can be allowed to rise and fall a bit in opposition to the receiver signal. keep in mind there are lenses, enclosures, and maybe blinders on both sides
>likely being measured as an analog value
the pinout of the DIP14 is consistent with the LM339 quad comparator. I see a window comparator arrangement on pins 1-2,4-7 of the chip, a data detector of some sort on 8-9,14 of the chip, and I lost interest in what the 4th comparator was doing
>50mA
first, the numerical currents are just for illustration. actual values will vary and require a look under the radio daughterboard (cute mounting scheme)
second, y tho. what desirable comes of it? wiring might need to be made thicker or more complicated, risk of light spilling or bouncing around an interfering object, risk of a short throwing a spark causing fire or explosion, you'd have to triple the power rating of that resistor. there are probably more reasons that don't come to mind immediately

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