Traffic single effect cycle computer??
10-24-10, 01:14 PM
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Traffic signal effecting cycle computer??
The last two times on my daily ride I stopped at a major intersection with multiple stop lights in both directions. Both times as I looked down at my computer the mph indicator was jumping around, today it went to 100 mph and stayed there until I was moving again. Then when I got home it showed I had gone about 2 miles further than I usually do on that route.
I haven't noticed it doing this anywhere else yet. Am I a bit crazy or could the changing lights at the intersection be throwing off my computer. Anyone ever heard of such a thing?
I haven't noticed it doing this anywhere else yet. Am I a bit crazy or could the changing lights at the intersection be throwing off my computer. Anyone ever heard of such a thing?
Last edited by Jiffyjam; 10-25-10 at 06:23 AM.
10-24-10, 01:24 PM
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Wireless computer? They sometimes do strange things.
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10-24-10, 01:41 PM
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Analog wireless is prone to that. It may not have been the stoplights themselves, but something else in that area. On my old analog cyclometer, turning on my headlights added 50 MPH to my speed.
Digital wireless systems seem not to have that problem.
Digital wireless systems seem not to have that problem.
10-24-10, 02:29 PM
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Take a pic of the Max speed attained before you zero the days ride.
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10-24-10, 03:41 PM
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Best pic I could get...check this out though...when the red light on my wife's Nikon digital camera came on and illuminated the computer it started to dance around, just like at the stop light. 
Last edited by Jiffyjam; 10-24-10 at 07:20 PM.
10-24-10, 05:54 PM
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It's likely caused by the loop detector embedded in the pavement (the circle or rectangular cuts you see at intersections). The loop detector works by generating a magnetic field, and when metal (such as a car, or a bicycle wheel) comes within range, the light controller senses a change in the field, causing the light to trigger. A common side-effect is interference with wireless cyclometers.
10-24-10, 06:00 PM
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My computer acts up when I ride by some airports. Everythings works fine except my HR monitor my max rate will spike to 260+.
10-24-10, 06:55 PM
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My computer acts up when I ride by some airports. Everythings works fine except my HR monitor my max rate will spike to 260+.
Last edited by Doug64; 10-25-10 at 10:50 PM.
10-24-10, 07:19 PM
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10-28-10, 01:03 PM
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It's likely caused by the loop detector embedded in the pavement (the circle or rectangular cuts you see at intersections). The loop detector works by generating a magnetic field, and when metal (such as a car, or a bicycle wheel) comes within range, the light controller senses a change in the field, causing the light to trigger. A common side-effect is interference with wireless cyclometers.
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