Mark Lanctot;210053 Wrote: > It's probably that the CF is emitting enough IR to blind the sensor. > Fluorescent bulbs do emit considerable IR which is kind of > counterintuitive because incandescents get very hot yet have never been > reported to blind an IR sensor.
Looks like this is indeed the problem. I found an explanation of the effect here (Warning: PDF-Link): http://www.neptunlight.com/files/IR-and-CFLs.pdf >From the document: > Why Does Interference Occur? > > Compact fluorescent lamps can interact with IR receiving equipment > operation when either the lamp excitation frequency or the lamp power > frequency is within the carrier frequency band of the receiving > equipment. Compact fluorescent lamp excitation frequencies generally > range from 20 to 65 kHz, and may even approach 100 kHz. IR remote > controls in the United States operate from 33 to 40 kHz and at about 56 > kHz. > Thus, lamps with excitation frequencies in the range of 20 to 40 kHz > are capable of interacting with IR remote controls (Figure 3). Symptoms > of compact fluorescent lamp interactions include the total loss of > remote control operation, random operation of volume controls, on-off > switching, channel scanning, lockout of manual operation, and reduced > operating range. They are also suggesting a couple of solutions: > What Can Be Done to Reduce Interference? > > End-users can do the following things: > 1. Move the compact fluorescent lamp out of direct line-of-sight of the > IR receiver or move it farther away from the receiver. > 2. Shade the lamp. > 3. Switch to another lamp model with a different frequency. (The IR > interference can only occur when there is a match of the compact > fluorescent lamp output IR frequency to that of the IR receiver carrier > frequency passband.) > 4. Switch to a compact fluorescent lamp with an excitation frequency > greater than 40 kHz or use a magnetically ballasted (60 Hz) type of > lamp. Number 1 and 2 I had already employed anyway, so it looks like I either have to shop for different bulbs or go with ceejay and ceejay;210044 Wrote: > Listen in the dark! Using a PDA is not an option. My trusty Palm IIIc has retired some time ago does not sport any (non-optical) wireless capabilities anyway. Oh well... Damn you newfangled energy saving infrared blasting Squeezebox confusing CFLs! -- sokratess ------------------------------------------------------------------------ sokratess's Profile: http://forums.slimdevices.com/member.php?userid=1056 View this thread: http://forums.slimdevices.com/showthread.php?t=36270 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
