About Jvan .23

Jvan .23 · 2023-10-31

Is it possible to use a Qi2 rx coil with magnetic array on a stwlc38 design? The goal is to use a Qi2 charger and reap the benefits of magnetic alignment and 15W charging while still being on the Qi1.3 standard of the stwlc38.

Jvan .23 · 2023-08-20

I have this board with a large (91x119mm) surrounding it. There is circuitry including the ST25R95 in the middle, but it has quite some clearance to the antenna. Matching network is calculated using the ST excel sheets.Now I can get it to read NFC st...

Jvan .23 · 2023-06-08

The datasheets front page mentions "Reader/Writer" as operating mode, but later only mentions " NFC-A / ISO14443A reader mode". Could you confirm that ISO14443A writing is supported?

Jvan .23 · 2024-08-20

Interesting. If we would have to start over the project (so the layout was not done already) we would definitely consider it, also depends on pricing.

Jvan .23 · 2023-08-28

So just twisted wire pair would work to connect the main PCB with the external antenna? We already have a JST-PH 2P connector on the board, then we'll use that. Is it possible to put the matching circuit on the antenna PCB as to keep the main PCB unc...

Jvan .23 · 2023-08-23

We just cannot get this antenna construction to work. Would it be possible to connect the ST25R95 to something like a U.FL or IPEX connector so we can seperate the antenna from the board with the RF chip? It seems a balun is what's needed if I look o...

Jvan .23 · 2023-08-21

As in: not much options (only the 2 mentioned), or they do not have much effect?The antenna is so big because it is on the outside of the board. Do you think this is an issue?

Jvan .23 · 2023-06-09

Okay, great. Thanks for the answer Brian

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Using MPP on stwlc38

ST25R95 poor reception

ISO14443A writing

Re: Using MPP on stwlc38

Re: ST25R95 poor reception

Re: ST25R95 poor reception

Re: ST25R95 poor reception

Re: ISO14443A writing