EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: Surajg on November 16, 2022, 06:50:46 am
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Hello Everyone,
I am newbie working on a project using LDC1314 (https://www.ti.com/lit/ds/symlink/ldc1314.pdf?ts=1668511175226 (https://www.ti.com/lit/ds/symlink/ldc1314.pdf?ts=1668511175226)).
There is one similar project in this TI reference design:https://www.ti.com/lit/ug/tidu954a/tidu954a.pdf?ts=1668580511933&ref_url=https%253A%252F%252Fwww.google.com%252F
This project uses 4x4 Pcb coil antenna which are multiplexed and read using LDC1314.
I am working on similar project where matrix is of 8x8 and want to uniquely detect action figures. However the antenna surface should be flexible instead of hard Pcb.
One option is to use polymide based based flexible Pcb which includes copper but those are too expensive.
On some google search I got results regarding Silver and carbon ink PET circuit (https://www.membraneswitch-fd.com/china-silver-and-carbon-ink-pet-circuit-p.html (https://www.membraneswitch-fd.com/china-silver-and-carbon-ink-pet-circuit-p.html)) and this seems low cost than PI based flex PCB.
Aim : Design the hard PCB coil design part using silver ink or carbon ink on PET for cost reduction.
Queries:
1. Is it possible to design 4x4 PCB coil like TI reference design on using silver ink or carbon ink on PET?
2. Usually copper based PCB coil have online calculator to measure inductance and different parameter. Is there any online calculator which can help me design this coil with silver ink or carbon as
material for coil design?
3. Can I take the TI reference design Gerber file as is and print the antenna part (keypad part without dome) on silver ink and expect same result as
hard Pcb with pcb copper coils?
4. Does the trace which are routed after the coil design in such circuit affects the inductance value of coil?
Thanks