IR phototransistor array help!
IR phototransistor array help!
(OP)
I am creating an array of 5x5 IR phototransistors of which an IR transmitter will be swinging across the array of phototransistors producing an output on the phototransistor recieving the IR signal (only one can be on at any one time). Whats the best way of wiring the array of phototransistors? I need a logic output from the 'on' phototransistor so I can use this information with a microcontroller. I have currently produced a simple IR sensing circuit with the use of a comparator. I could produce all sensors in this manner but this would require each output to be wired through an ADC which would then be sent to several microcontrollers.Is there a more efficient method??





RE: IR phototransistor array help!
With these systems it's always the ambient that nails you.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: IR phototransistor array help!
However, your typical IR transmitter puts out a rather wide beam, so it's unlikely that you'll only have one on at a time, unless they are significantly separated.
TTFN
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RE: IR phototransistor array help!
IRstuff - could you elaborate on how to connect the 5 vertical and 5 horizontal wires? Does this method incorporate my existing circuit?
RE: IR phototransistor array help!
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: IR phototransistor array help!
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