moebius Posted May 3, 2004 Report Share Posted May 3, 2004 I know this is an old thread but.. I just needed to comment. JMJ's lazer harp didnt work. I know from a very reputable source... my brother has worked with him on his Lyon concert (Houston/Lyon album)."Uuh, jea really.." sounding like Beavis comin' Â outta Butt"-Head..""But has anyone really heard any velocity on those redeavouass -pieces?!Bye, Moebius<not givin' any comments on those threads about IR sensors, just while ago> Quote Link to comment Share on other sites More sharing options...
daemons_ca Posted May 4, 2004 Report Share Posted May 4, 2004 Thats just the thing... :) There is. ..or it might be a filter effect.. what do I know. :-/ But it was originally supposed to have like the D-beam.Btw.. I am working on a design of a MidiBox D-beam and my concept will work! (dammit!)Marc"Uuh, jea really.." sounding like Beavis comin' Â outta Butt"-Head..""But has anyone really heard any velocity on those redeavouass -pieces?!Bye, Moebius<not givin' any comments on those threads about IR sensors, just while ago> Quote Link to comment Share on other sites More sharing options...
d2k Posted September 11, 2005 Report Share Posted September 11, 2005 Hi,Did anyone have any success with the GP2D12 sensor? I picked up a couple and used this buffer: http://engin.swarthmore.edu/~adobos1/e58/hover/index_files/image017.jpg but with just a positive voltage and no negative voltage (opamp - pin connected to ground). I can get values from around 38-127 but am unsure how to code mios to make it see the lowest value as 0 so i can get a 0-127 range...any ideas?Thanks! Quote Link to comment Share on other sites More sharing options...
thepcman Posted August 15, 2009 Report Share Posted August 15, 2009 The link you have posted expired but i think the problem is the minimum output voltage that op-amp can handle. If an op-amp's negative supply is connected to ground, it cannot guarantee (it usually won't) to go down to 0 volts. For instance, a ua741 can give minimum 1.2V, a LM358N will give 0.2-0.3V. So, even if you do not use negative voltages, you should supply the op amp negative supply with a really negative supply.The Sharp analog's can handle 30-40Hz of sudden changes, it responds continuous changes easily. The problem with them (i think) they give non-linear output wrt to distance. I was thinking today to interface it to MB, and i end up with the conclusion that an AD-Processor-DA chain should be used to calibrate and modify the output of it. I will design a simple circuit soon to handle it. Quote Link to comment Share on other sites More sharing options...
nILS Posted August 15, 2009 Report Share Posted August 15, 2009 Um yeah, I am pretty sure d2k solved that problem or quit the project, after all he asked 4 years ago... Quote Link to comment Share on other sites More sharing options...
thepcman Posted August 15, 2009 Report Share Posted August 15, 2009 Sorry dude, as you see i'm newbie, i did not look at the date of post :D Quote Link to comment Share on other sites More sharing options...
nILS Posted August 15, 2009 Report Share Posted August 15, 2009 Hehe, no worries, just saying ;) Quote Link to comment Share on other sites More sharing options...
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