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  1. throbscottle

    Directional sensor?

    I was pondering it would be cool to create a, lets call it a "toy" and suppose it's a bear or a doll or something, which can detect passers by and turn it's head as though it's watching them. Ok maybe it's just creepy. Is there some kind of sensor, or way of making a sensor, which can detect...
  2. R

    Need help selecting photodetector

    The photodetector is to be used to detect green light from an optical fiber (emitted by fluorecein, about 500nm). I have tried using this detector, but with no readings. This diode has a response of about 0.25 A/W at 500nm. This is the amplifier I have used (OPA27GP): Is there a better...

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