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In lugnet.trains, Jordan Bradford wrote:
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I was reading posts in RTL and found one about a LEGO robotics summer camp
selling a bunch of their stuff. They have a nice little magnetic field sensor
on sale:
http://www.funrobotics.com/masekit.html
Putting one of these under a track could easily sense when a train was
passing over, plus it wouldn’t be as bulky and conspicuous as a light sensor
setup usually is.
Just thought I’d pass this info along. I’d buy one for myself, but I’m a
purist. At least it looks like a real LEGO sensor. Now, if only LEGO would
make one, too! The site has some other cool custom electrical parts, so check
them out.
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Not being a purist, I ordered 5 of their magnetic sensor kits together with 20
of the short electric cables a while ago. The package that arrived contained the
5 magnetic sensors but only 6 of the electric cables.
So I e-mailed them about the discrepancy of the electric cables but did not
receive a reply. Repeat e-mails have also gone unanswered despite their claim
“You get an answer to your email within 30 MINUTES*.”
I hope this episode will be resolved satisfactorily. But meanwhile, I thought
I’d pass this info along.
C S Soh
http://www.fifth-r.com/cssoh1
...where air is power
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Message is in Reply To:
 | | Magnetic sensor
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| I was reading posts in RTL and found one about a LEGO robotics summer camp selling a bunch of their stuff. They have a nice little magnetic field sensor on sale: (URL) Putting one of these under a track could easily sense when a train was passing (...) (20 years ago, 22-Oct-04, to lugnet.trains, lugnet.robotics, FTX)
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