In an earlier post you wrote that you have all the information to build
optical pots for your racinggear.
Could you share this info with this group ??
I'm racing my homebuild gear since GP2 but the pots are always the weakest
part.
So I'm very interested in rebuilding mine without the pots.
I and many homebuilders would be very gratefull.
THX in advance
Matt
It was first explained to me this way... Your every day general mouse
uses an Optic sensor and an LED and a splined wheel between them. When you
move the mouse, the splined wheel moves allowing the light from the LED to
pass through to the sensor, which in turn tell the cursor to move. I knew
the splined wheel was there but I just assumed there where small magnets in
it and the sensors next to the wheel picked up the movement. If I had known
about the "light" sensor I would have built an optic system a LONG time ago.
Then I was told about the... I can't think of the name.. Light
something Resistor, or something like that. Basically this sensor measures
light. The more intense it is the more resistance this diode holds.
Do a search on Diode's and maybe the sensors will be listed there too.
I visited several sites and most of them described the function and uses for
this sensor.
--
Michael A. Barlow
FILSCA (www.filsca.com)
Light dependent Resistors from nearly any electronics shop - made from
Selenium.
Model number is ORP12 or equivalent I think. More light=less resistance.
Another thing to know is it seems Windoze senses that there is no joystick
connected once the resistance goes above ~200k ohm. What this means is that
there is a limit on the maximum distance that the LED can go from the LDR.
If you need to go more distance then you either use more LEDs or single LED
with more current.
The LDR's have min resistance of a few ohms depending on amount of light
from typical LED. What this means is that the LED can basically touch the
LDR at the other end of its travel.
On my wheel I use 4 LEDs and travel is about 70mm, but on my pedals I use
single LEDs where travel is about 40mm.
--
Peter H
GPL sucks...you in
removethis to reply
......BTW: someone
