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 Robotics / RCX / 1446
    GP2D12 IR sensor RCX active sensor interface? —Gareth Bestor
   I recently acquired several Sharp GP2D12 IR distance sensors that I want to attach to the RCX for use in the robotics course I'm teaching at Vassar College. I found an RCX interface circuit for this sensor at (URL) I go ahead and build it, I though (...) (23 years ago, 5-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Rainer Balzerowski
   (...) Hi Gareth, i build a interface (mutiplexer) using one input for three (ore more with little changes) sharp GP2D12 and a 9V battery. (Actually Michael Gasperi builds it !!!! I only made some changes !!!!) Have a look at : (2 URLs) more general) (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Gareth Bestor
   (...) Thanks. I actually have all your stuff bookmarked already and am aware of your 3 sensor mux :-) What I really want is something simple - like Phillo's design - that is plug-n-play on the RXC. Unfortanately his circuit board is a little bigger (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Rainer Balzerowski
   (...) Hi Gareth, I guess the three wire solution won't work. (Not tested it myself) The Sharp GP2D12 have a current consumption of about 35mA-50 mA (at 5V) !!!! Michael Gasperi mentioned that an input of the RCX only give about 15mA. ((URL) techno (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Gareth Bestor
   FYI - I just noticed in the component specs from Sharp that the GP2D12 (and GP2D15 for that matter) have a built-in voltage regulator. See (URL) is an external regulator a necessary precaution? Just curious... - Gareth (23 years ago, 9-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Rainer Balzerowski
   (...) Hi Gareth, maybe you don't need an external regulator ?!?! But, the specs also say that rating of supply voltage is "-0.3 to +7V". Do you know what happens to the sharp if supply voltage rises above +7V ??? (the mux has a supply voltage of +9V (...) (23 years ago, 9-Oct-01, to lugnet.robotics.rcx)
   
        Re: GP2D12 IR sensor RCX active sensor interface? —Philippe Hurbain
   Hi all, It seems I missed this thread... (...) As suggested by Rainer, if you use an external battery everything is much simpler, you could even use a 4.5V battery to avoid regulator. (...) I don't think you can improve this circuit with a simple (...) (23 years ago, 10-Oct-01, to lugnet.robotics.rcx)
 

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