Talk:Cyclocomputer

message: The sensor of a cyclocomputer, mostly on the forefork, is NOT a Halleffect sensor as indicated in the article, which would be too costly and complicated.  It is simply a switch, called Reed-relay, that closes when the magnet comes nearby it.  The Reed-relay is nothing else than a small narrow glass container with inside two iron electrodes (plated with copper).  When the magnet comes nearby the normally open contacts close, which is detected by the cyclocomputer. -from Benjamin: 79.6.236.172 07:51, 30 July 2007 (UTC)
replies: text: A reference either way would be handy -AndrewDressel 11:42, 31 July 2007 (UTC)
replies: text: Hi!  This may sound really trivial and petty...  scratch "may sound", it is really trivial and petty, but... The caption for Image:Cyclocomputer_sensor.JPG reads "A wired Hall effect sensor with spoke mounted magnet."  Me, I'd much rather have computer which works by interesting Hall effect than by a boring old reed switch.  Tesla and Edison pretty much irrelevant to this, but as famous engineers go, who's the more interesting? Naturally enough, instead of looking for reliable, verifiable and peer-reviewed reference info, I did some good old fashioned Original Research.  The sensor in the pic is the sensor unit for a Cateye cyclocomputer.  Got similar Cateye sensors on my bikes.  Waved a fridge magnet at them (sensors, not the bicycles) and could hear a teeny "pink, pink, pink" of what I guess is a reed switch, as the cadence read-out displayed 199.99 and my maximum trip speed went up from 35kmh to 92kmh.Admittedly, my sensor kits (like my bikes, and myself) are all pretty ancient.  Going by the forks' paintwork, the forks (Reynolds tubing? Columbus?) and their dropout pattern, and the QR skewer's cam lever and retaining nut, the bike in the pic looks like an oldie-but-goodie.  The sensor unit looks newer. However, I don't think Cateye would have more latterly changed from reed switch to Hall effect sensors - Hall effect sensors apparently have magnitudes larger current drain on head unit batteries.  Do you think the pic caption should be altered? --Shirt58 (talk) 11:34, 26 March 2008 (UTC)
replies: text: I can find nothing either way. I've sent a message to Planet Bike to see if they can shed some light on this topic. -AndrewDressel (talk) 16:57, 28 March 2008 (UTC)
thread_title: Sensor technology

message: Please add a section with the history of the computer including a section or link to the analog devices used previously on bicycles to determine distance.  such as the first bike odometer eximo 02:38, 28 October 2007 (UTC)
replies: text: While a brief history section has been added, it is very brief. We essential skip from the first distance measuring device to modern cyclo computers. The first device may well have been cable actuated, as were mant speedometer units sold to kids in the 1950s, but there were also cycolmeters driven by a spoke mounted striker which contacted a star-shaped wheel on the cyclometer. I remember having several such devices in the 1960s. Then there was the Huret Multito (sp?), which used a pulley on the wheel and drive belt instead of the striker arrangement, and also had a resettable trip odometer in addition to the cumulative readout. Wschart (talk) 17:58, 28 October 2015 (UTC)
thread_title: History

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thread_title:  External links modified