Originally Posted by
01 CAt Man Do
Wireless computer being used....The easiest way to fix this is to use a "wired computer". The other option is to move the lights as far away from the computer as possible.
Although it's never been talked about ( as far as I know ) I've wondered if the same thing happens with devices using either Blue tooth or ANT+. For me that's an important question to answer because I've considered the possibility of using a wireless speed sensor ( BT ) to use with a smart phone app.
ANT+ and BT are basically immune to interference from lights. What the OP is seeing is basically standard for LED lights and non-digital wireless computers.
Most LED lights have 2 settings, ON or OFF. High = ON continuously. Flash is usually a long burst (~100 ms) at full power. To achieve settings other than OFF or HIGH, the manufacturers rapidly pulse the light at ~kHz frequencies. If the light isn't well-shielded (most-aren't since shielding is expensive and heavy), the light puts out a bunch of RF noise at the pulse frequency.
The battery type used by the light has absolutely no impact on if it generates interference or not. Some lights do, some don't. It all depends on the internal control circuitry. More powerful lights will be more likely simply due to the higher current draw and therefore larger RF spikes.
The stupid wireless computer basically just looks for a short pulse at a given RF frequency (also frequently ~kHz). The noise from the light can totally swamp the receiver on the computer.
As a general rule, I consider non-digital wireless computers not worth the money. Either get a cheap wired or move up to Garmin (or equivalent).