Re: [Fairlight-CMI] Re: Some help needed - light pen connector on monitor
2008-06-06 by Harald Feldmann
Hi David, Have you tested the leads and made sure no wire is broken ? Regards, Harald
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> Thanks to everybody that responded and gave me useful information. > Unfortunately I have to realize that my light pen isn't working anymore. > > So, no page 4 or page 6 joy for me. > > Best, > David > http://dvdborn.blogspot.com > > > --- In Fairlight-CMI@yahoogroups.com, "tootith" <duemachine@...> wrote: >> >> Hi David, Peter Wielk helped me out with this exact same issue several >> years ago. I dug through my emails and found this: >> >> "Regarding the light pen, as an overview, the pen requires 5 volts >> from the monitor power supply for its internal electronics, then there >> are two logic signals, hit and touch which are output by the pen and >> pass straight through the monitor into the CMI mainframe where they >> feed into the graphics card (Q219 from memory). >> >> The wiring is as follows: Black earth, Red +5V, then green and white >> are hit and touch, but the manual doesn't say which is which! However >> touch should appear on pin 3 of the 5-pin graphics output XLR on the >> back of the monitor whilst "hit" should appear on pin 1." >> >> If I remember right, the IIx at my college ended up wired as follows: >> >> Red to Purple +5v >> Black to Black (ground) >> Green to White (pin 1) >> White to Grey (pin 3) >> >> Regards, >> Fred Duey >> >> >> >> --- In Fairlight-CMI@yahoogroups.com, "dvdborn" <dvdborn@> wrote: >> > >> > I'm still trying to find out how I need to connect my light pen back >> to the monitor on a IIx. >> > >> > If someone could tell me which voltages they measure on the >> connections points of the light >> > pen connector on the monitor, I can figure out how to connect them. >> > >> > Would anyone be so kind to measure this for me? >> > >> > There are 4 pins that should output some voltages. Two pins should >> read about +1,94V, and >> > one is +5V and the other one is -0,01 volt. I used the ground >> connector on the inside of the >> > panel of the Mainframe unit as my other connection point while >> measuring. >> > >> > David >> > http://dvdborn.blogspot.com >> > >> > > > > > ------------------------------------ > > Yahoo! Groups Links > > > >