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Old 02-02-12, 09:39 PM   #1
Don in Austin
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Magicshine knocks out wireless Sigma Computer -- Shield the battery leads?

I haven't found a way to route the Magicshine battery lead where using the headlight doesn't eventually knock out my Sigma's readings. Has anyone tried shielding the Magicshine battery cable?

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Old 02-02-12, 09:44 PM   #2
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I would think it's the controller, which is in the light itself
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Old 02-02-12, 09:58 PM   #3
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But the leads would most likely act as an antenna for the noise generated in the controller. I have been able to route the leads such that I went several miles before the computer got knocked out.

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Old 02-03-12, 08:28 AM   #4
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I ended up replacing my wireless computer with a wired one because I couldn't find a way to avoid the interference. The upside is that wired computers are generally less expensive and their batteries last much longer.
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Old 02-03-12, 10:40 AM   #5
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I have an old Cateye wireless that gets messed up by my Magicshine. Putting them on opposite sides of the handlebars is enough to make them work though. Didn't need to shield mine after all.
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Old 02-05-12, 08:21 AM   #6
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Quote:
Originally Posted by Don in Austin View Post
I haven't found a way to route the Magicshine battery lead where using the headlight doesn't eventually knock out my Sigma's readings. Has anyone tried shielding the Magicshine battery cable?

Don in Austin
I have a Sigma Rox 9.0 and several Magicshines. I've tried shielding and multiple positions. The main issue for me is losing cadence as this transmitter is furthest away from the Sigma computer. One method for eliminating interference is to coil the wire around the handlebar three times outboard of the light. Although this helps, I eventually lose cadence as the battery increases current with declining voltage.

Ultimately, the best solution for me is to run the single cell Magicshine flashlight on the handlebars. This causes no interference. I then attach the four cell light to a Bell Sweep helmet and use the extension cable down to a battery kept in a bike jersey rear pocket. This particular helmet works perfectly as no extra mounting hardware is required.

This solution has the added benefit of allowing you to read the computer without turning on the back lighting.
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Old 02-09-12, 09:33 AM   #7
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I'm looking at putting a MagiShine on the front end of a TerraTrike Rambler... the wireless Cateye computer sensor and display will be on the wheel/adjacent handlebar, less than a foot seperation between the two... does anyone think I'll have a problem with this?? The light will be about 2 ft ahead of the Cateye..
Wes
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Old 02-09-12, 09:43 AM   #8
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it's really not possible to predict who will have problems

If I was really dedicated to using one of these lights, I'd probably put in some ferrite beads or extra capacitors or something else that would knock down the emitted signal
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Old 02-10-12, 07:59 PM   #9
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Originally Posted by tarwheel View Post
I ended up replacing my wireless computer with a wired one because I couldn't find a way to avoid the interference. The upside is that wired computers are generally less expensive and their batteries last much longer.
This is why I stick with wired. Even though it is of production, I am still able to Blackburn's wired Delphi 6.0 that has an altimeter(the 5.0 does not).
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Old 02-11-12, 05:50 PM   #10
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I wrapped the power cord around the brake cable and that took care of the problem.
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