How will an LF xLED reduce the range of an xEM in the same read range?
1 Like
This assertion only applies for LF and only when they’re two separate implants (not sharing the same coil) but I suspect it will have little no effect. Test it out with your X Field Detector. Most LF readers pump out a large amount of power, and the xEM requires so little to operate. I bet you could even scan an xEM through a diagnostic card. I’ll try that today.
1 Like
I’m assuming its negligible.
4 Likes
@Satur9 Awesome of you to just test and film it!
I’d think the decrease in range comes more from the plastic of the card, instead of the power requirements to power 2 devices.
Just a guess though.
1 Like
Nah, plastic has almost zero effect on magnetic fields because of its low permeability.
…also it’s not plastic, it’s woven fiberglass (FR-4)
4 Likes
The decrease comes more from the malformation of the magnetic field… the RDC has a huge spiral coil in the center with fat traces to pick up 125kHz… this will significantly deform the magnetic field coming from the reader. The impact of an xLED-LF on an LF x-series tag is negligible at most… possibly taking read range down by 10% at most… which when you’re dealing with distances of 1cm, we’re talking 1mm at most.
2 Likes
Semi related question, but how bright is the implantable xLED compared to the diagnostic xLED? The diagnostic xLED seems pretty dim at least in my testing.
What are you testing it with? I usually only get dim reads with my installed xLED, but every once in a while, I hit the sweet spot, and it’s exactly as bright as the diagnostic, save for the fact that there’s skin in the way. it’s the same exact tag, just safe for implanting, as far as I’m aware.
1 Like
the only difference is the glass and resin… the “circuit” is the same. Early one we had some tuning issues, particularly with the 125kHz LF xLEDs… but that has been resolved for a while now.
1 Like
The diagnostic xled I have is pretty darn dim and almost too dim in my opinion. I don’t think the light could reliably penetrate the skin unless mines a lemon.
How are you powering it?,
Is it an LF or HF?,
How old is it?,
Have you dropped it?,
Can you post a video of it in action?
1 Like
HID Thinline 2, LF obviously, it’s maybe a year old, don’t think I’ve dropped it, and give me a bit and I’ll post a video
Nevermind on the video, I’m good.
The LED on my diagnostic xLED lights up at about 1/2 to 1/4 the distance I can get a good read on my xEM from on the reader. Not sure if that’s saying something good about the xEM or bad about the xLED.
I mean, it’s dim enough to the point where the promo pictures for the xLED seem light years ahead of what is in my diagnostic “chip”. In comparison the HF xLED is way brighter from my phone versus a standalone reader.
Have you complained to DT about this?, There’s a help button on their website, If you feel a certain way about your xLED LF
Then I strongly suggest you go complain to them instead of doing it on here…
I don’t perceive bepiswriter as complaining, he’s just trying to get to the bottom of this. Here’s pretty knowledgeable, it’s not like he’s new to this space.
@bepiswriter
There might be something to this variable brightness. The LF xLED variant has a larger coil (more resistance) in order to achieve resonance at 125kHz. I think the physical LED has different specs too. There’s also the possibility that different LF readers behave differently. Other than their coil/enclosure shape, they may also pulse differently or limit their output current until they detect an appreciable current draw from the card (which the xLED does not produce due to poor coupling)
2 Likes
I tried to help him, Until he gave me an attitude.
My main issue here isn’t the diagnostic xLED, it’s that I want to get the right xLED implant if there is somehow fundamental differences between how the two operate at a level beyond my understanding. I want something that is bright and can produce a “wow”. Doing some testing with the Thinline reader at my desk, it looks like while the presence of a valid tag does change the brightness, it does not change by much.