Subject:
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A fast light sensor?
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 20 Jan 1999 04:29:06 GMT
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Original-From:
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Duncan Orthner <ORTHNER@ihatespamIDIRECT.COM>
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Viewed:
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1161 times
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Ummm, Hi all
I'm looking for a circuit that will interface a photo transistor or a
photo diode to a digital input. I tried a photocell in an analog port but
it's too slow, I want to use a *visible* light pulse as an accurate
trigger: ie. input triggered when light goes on. I think a transistor or a
diode will be fast enough, but I have no idea how to hook up such a device.
Thresholding won't be a problem as the sensor will be in total darkness
until hit by very bright light. I'm sure this is pretty simple...?
Thanks, Duncan
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Message is in Reply To:
 | | Douglas Electronics Expansion Board.
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| I ordered the kit the first day I could. I got it last Friday, and put it together over the weekend. The douglas board comes with NO assembly instrictions! These are some notes that ought to make things easier for others: RP1 & RP2: The both have a (...) (26 years ago, 18-Jan-99, to lugnet.robotics.handyboard)
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