Greetings all; I got the next generation of that board done today and populated it.
This slot type opto device is a Honeywell HOA2001, a 5 terminal device whose basing is marked on top of each tower for the + terminal and an E for emitter, or an S for the sensor. The led has a 150 ohm current limiter, and a 1N914 type diode for polarity protection in series with it. 1. EVERYTHING rings with a dvm in ohms just like my schematic says. 2. All polarities of applied voltages are seemingly correct. No smoke came out when I powered it up, and I didn't hear any mirrors break. ;-) 3. There is, according to ohms law, 0.0253333333333 amps of current flowing through the exciting led, as measured by the voltage across the 150 ohm resistor divided by the resistors value. The 1N914 is dropping a hair more than 450 mv, and the led is showing about .80 volts across it when powered by a 5.13 volt supply. 4. All logic outputs with the slots open are sitting at about 18 millivolts. 5. Dropping a piece of double sided, copper clad pcb material into the slot isn't seen, all 3 logic outputs remain at 17 to 18 millivolts. I don't think I can get much more opaque to IR than that. I probably have my face stuck to a tree and can't see the rest of the forest, so I am wondering if anyone else might offer a clue. I can post the eagle files so you can see what I have, which one(s) should it make available on my web page for your perusal? I just made an 'eagle' subdir in genes-os9-stf,, and put these files, generated by eagle-0.6.1 in it: [root@coyote Genes-os9-stf]# ls -l eagle total 268 -rw-rw-r-- 1 apache apache 10892 Feb 12 16:12 1_mystuff.lbr -rw-r----- 1 apache apache 1405469 Feb 20 17:36 HOA2001-mechanical.png -rw-rw-r-- 1 apache apache 75200 Feb 17 09:55 lathe-encoder.brd -rwxrw-rw- 1 apache apache 922 Feb 18 12:52 lathe-encoder.pro* -rw-rw-r-- 1 apache apache 170535 Feb 17 09:55 lathe-encoder.sch Which if I understand eagle well enough, should be enough to reproduce this board in your copy free (like mine) eagle. The only discrepancy I see from the data pdf honeywell supplies, is that the emitters forward voltage is shown as 1.6 volts. but I'm showing about .8, as if it may be wired bass-ackwards. But the wired polarity matches the data sheets + mark on top of the emitter tower. Turning it around will of course need a new board made. I blew the basing they show, way the hell up and printed it, but they don't show polarity, just an A-K marking on the bottom view to the right if you turn that scan to landscape. A scan of that is also there, as the HAO2001-mechanical.png file above. Comments please. Thanks. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Snakes. Why did it have to be snakes? -- Indiana Jones, "Raiders of the Lost Ark" ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
