let me see what i can do.
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freecad is force closing each time i try to save the step file, so here is the Freecad file.
NFC_Field_Generator_Solo.FCStd.zip (321.8 KB)
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You can probably export the STEP file right from your EDA. Thereās no need to convert it in FreeCAD.
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NFC_Field_Generator_Solo.step.zip (164.5 KB)
I didnt realize i could do that.
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THESE
NOT THESE
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Crosspost
ā New watched words for Midwest Gadgets
\bMidwest Gadgets\b ā https://www.midwestgadgets.org/
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Midwestgadgets.com now successfully redirects to Midwestgadgets.org
Ill inevitably switch it so that .com is the parent, and org is the redirect but this will do for now.
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Hey all, quick Update Time.
Just a reminder that DT Club gets first notice of my product releases
I added 4.5 new products to my site.
First up are DIY Field Generators. Now you can make your own formfactor and bracelets if wanted. These are just like the field generators I carry but are just the base. You add your own antenna and power.
I of course have antenna and USB-C pigtails I can also supply.
These have actually become my favorite. Using usb-c I can supply 5v vs the 3v that the cr2032 supplies in my other generators. These can be pushed up to 19v before burning out components but I would recommend not going over 9v for extended use. I also recommend putting some type of switch in place. But these are fun to play with and use to learn to make your own antennas and coils with magnet wire
NFC Extenders in 3 seperate Flavors:
Standard - JST PH2.0 connectors
Pro - IPEX1 (U.FL) style connectors
ProSMA - SMA style connector (Note these are not going to be regularly stocked and once they are gone they are gone).
Each extender has 2 different cable length options. 15cm is the default. But you can still use your own if your crafty
These dont work great with Implants unless you add an MFGC to the middle of the extender that you plan to scan with an implant. I will release a more implant ready version with a smaller coil that works great in testing but it wont be until after the Chinese New Year holiday (mid Feburary).
This was a goal project of mine for about a year. Last year I wanted two things to exist that didnāt. First was a repeater so I could scan my implant with my phone. We have that with the RSP and MFGC. Next I wanted a NFC Extender so I could relocate my reader to another area of my desk. And while they do exist I wanted ones with custom cable lengths. They were always too long or too short. I tested many different cable connection styles. I finally settled on JST and Ipex. I initially wanted SMA however it introduces to much capacitence so I will only be selling what I have and I donāt really intend to make more of this style. It just doesnāt maintain the performance I demand over extended lengths.
Iāve tested all of these devices and they work great with card and fob credentials over 4 ft. If you need a extender solution and didnāt want to wait for my implant compatible version you can place an RSP or MFGC in the center of extender that you plan to use to scan the implant and it will narrow the field enough to get successful reads. However thatās if you need it now and donāt want to wait.
and finally to go along with the DIY Field Generators i will now stock the 27mm antennaās for any diy projects. These will resonate at 13.56mhz with 100pf of capcetence. So any diy projects you had in mind and wanted a HF antenna on this is a great solution.
Direct links below
And just a reminder please if you plan to order use Discount Code pilgrimsmaster for a nice discount
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Working on a new little project.
Field meter.
CR2032 powers the display only so it can last a while. Analogue display doesnt require power at all.
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I gotta get another meter in that will go to 5v. The digital display must do some type of averaging because it does not detect the pulsing field of phones at all
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Oh my god hard numbers, this is great! This could be so much more helpful in certain applications compared to a field detectorā¦ āYeah the light is a little brighter hereā¦ I think?ā
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Exactly. Or determining minimum coupling voltage. Would be helpful in diagnosing the low power readers
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Thatās awesome
Looking at it, i had a couple of thoughts
What about a coloured scale?
Leds almost do it for you
or simply
or
Just a thought, and you probably already thought about itā¦
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I did!
It was actually my first initial thought to create because itās simple. But it also increases the power draw. The little led that is there draws .2v of power so it throws off the reading. Which is why I thought to go analogue or a powered digital display.
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Thats because your clever, and Iām just along for the rideā¦
I do love the simplicty of analogue for its plug nā play ability
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Me too! Thereās just a satisfying integration of old and new technology that just makes it seem right.
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(Crossing fingers now:) Once some form of this comes out, it probably wouldnāt be too hard to make a loose chart for required minimum voltage for different implants. I have absolutely no clue what the actual numbers would be, so ignore anything stupid I use for the exampleā¦
Sayā¦
- 1.0-1.5v for a flex read
- 1.4-2.1v for an xLED to light up
- 1.9v-2.3v for an xM1 read
- 2.0-2.5v for an HF NExT read
and so onā¦
Obviously this would be somewhat āstandardizedā for whatever size of antenna etc, but I think this makes sense?
Iām sure that is all documented in the data sheets. But I was more stating we can start tracking the voltages on readers and devices that didnāt couple . At least now we can see if itās because of power or other trickery.
Itās gonna be at least a few weeks for me to prototype this and then figure out the best way to arrange everything on a PCB.
Iām thinking a similar form factor as the field generator for the digital display and Iāll use the same size antenna for the sniffer.
The analogue display will get the large antenna.
Then Iām really going to need to design a case for these. It only seems right. Because of this is gonna take time to think through it.
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Due to the recent discussion regarding DT Club, i am releasing this to the lounge and forgoing this product announcements release to the DT Club.
After a few Hiccups and quality issues, i am proud to announce MidwestGadgets now carry NFC Extenders specifically tuned for Implants.
These are pretty top-notch with amazing read qualities. They havent been reviewed by Pilgrim yet although @mrln did receive a prototype version of it last month. They work incredibly well at 30 cm distance from reader to pad (connected via U.FL cable) and i get successful reads off of my xSiid by almost 1inch.
The coolest thing is that these can be mix and matched with its larger brother the Pro. So you can have one 60mm pad and one 27mm pad and it will function all the same. I dont have a way to specify that on the site however it is what you want let me know when you order and ill swap in one of the larger ones.
@amal and @tacos youāll be getting a care package if this in the mail tomorrow for your own independent testing. @Pilgrimsmaster if you donāt mind Iāll hold off on sending you this one until the next product. Itās the same as what you have just went through a shrink ray
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Been having a lot of fun with this meter. wanted to share some of the things i found.
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