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1  Using Arduino / Sensors / Re: Sensor to measure engine RPM on: June 04, 2012, 03:51:16 pm
I am using an slot optical interrupter.  My results are mixed.  I have a center of a CD (clear part) painted half black.  In the code I can use the "pulseIn(high or low)",  I have tried both and sum.  Seems to work well at the higher speeds. Putting a 5ms delay between the high low count helped.  I don't know why it isn't better tho.  I am using the 3.3v supply thru the "S" to pin 10 and ground the pin 10 with 100ohm.
2  Using Arduino / Installation & Troubleshooting / Re: Code 10 -device will not start on: May 21, 2012, 10:07:24 am
I do not see "Firmware"
there's a "Driver Key" and those numbers differ - one ends in 0001 the other 0000.  I picked Driver Key because driver seems to be a factor otherwise ???
3  Using Arduino / Installation & Troubleshooting / Re: Code 10 -device will not start on: May 18, 2012, 11:44:37 pm
same vendor no hub
4  Using Arduino / Installation & Troubleshooting / Re: Code 10 -device will not start on: May 18, 2012, 08:24:26 pm
No both work but I have to pick one to be inoperable.  Either one can be selected but I would have to uninstall and reinstall on the two COM ports switched to swap which will work. 
Consider this -none installed.  I take one board -either of the two I have, and install.  I get code 10.  Leave it and connect the other it'll install right off full operation.  If I uninstall the first the second with code 10.  So if I want to use board "b" I must install board "a" first (gets the code 10) then install "b" works.
I did try to disable and install - got two disfunctional "code 10".  So if one board goes elsewhere and I want to use the remaining one I will have to make the leaving one go code 10, or I suppose borrow a board to get it code 10 so mine would be functional.

Doesn't make sense but seems to be consistant.
5  Using Arduino / Installation & Troubleshooting / Code 10 -device will not start on: May 18, 2012, 10:14:36 am
I'm new here, my first efforts were met with a driver problem COM3  "Code 10 - device will not start"  and ""best driver but it may not work".  Thing is my board (UNO) works fine on one PC but not the other.  Both are Win7 64 bit - but the one that works is 1 yr old and the other new.  After requesting help, and several downloads restarts... I finally gave up and went to the store (Radio Shack) and asked if I could plug in to another board.  Did so and this brought up COM4 working fine.  Took it home and swapped the boards. Then I uninstalled the COM3, reconnected the new board and it went back to COM3 Code 10.  So I connected the old board and it came on right away with COM4 working properly. So I reversed sequence and connected back to the new board and seems ok.  So I am functional or at least can be with the right sequence between boards.  Still is a problem if I want to run either board.
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