Vancouver LEGO Club : 1239


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Subject:	Re: Reed sensors are not working very well (or too well?)
Newsgroups:	lugnet.org.ca.vlc, lugnet.trains
Date:	Thu, 26 Jul 2001 16:55:09 GMT
Viewed:	1236 times

I know this has been covered in the past, but can you point me to info on the reed switch used and implmentation notes. Thanks I'm working on a ping-pong line for a trolley and I'd like to try reed switches. I've had troubles with light sensors and touch switches. Actually the whole RCX thing might be more trouble then its worth. SteveB In lugnet.org.ca.vlc, Dean Husby writes: > [I'm cross posting this to trains just in case anyone has a idea or > fix.] > > I've finished the reed sensors for the Trolley line. Work fantastically! > > I've also finished the reed sensor for the Hogwarts. Not so good. > > In my tests I used a single car to test the sensor to make sure the > magnet couplers did not set off the sensor while the intended one did. > Worked well. Now, however I tried a string of cars and AHHH, when two > magnets are together they trip the sensor! > > Most nasty. I'm attempting to dampen the sensors ability while making > sure it works for the intended use... > > If anyone has any ideas how how to identify a train (amongst others) I'm > all ears... > > Dean

Message has 2 Replies:

		Re: Reed sensors are not working very well (or too well?)
(...) I had not know of anyone using reed switches with lego before so I don't have any links to info, but I used a standard reed switch, encased in glass. NO (Normally Open). There was a 20 mm and a 25 mm I believe. (...) I've created a trolley (...) (23 years ago, 26-Jul-01, to lugnet.org.ca.vlc, lugnet.trains)

		Re: Reed sensors are not working very well (or too well?)
(...) This is the original message by Chris Phillips: (URL) my version, following John Barnes's suggestion, I put a 100 ohm resistor in series with the reeds. The devices are very low current, and if you make a wiring error and connect them to an (...) (23 years ago, 27-Jul-01, to lugnet.org.ca.vlc, lugnet.trains)

Message is in Reply To:

		Reed sensors are not working very well (or too well?)
[I'm cross posting this to trains just in case anyone has a idea or fix.] I've finished the reed sensors for the Trolley line. Work fantastically! I've also finished the reed sensor for the Hogwarts. Not so good. In my tests I used a single car to (...) (23 years ago, 25-Jul-01, to lugnet.org.ca.vlc, lugnet.trains)

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