posted on Sep, 25 2021 @ 06:41 PM
a reply to:
AaarghZombies & Gapkid2020
FYI, as far as powering these things; all you need to do is capture ambient RF energy (radio waves), and convert to DC voltage to run your circuits.
The tech for doing is very old. We were using this tech at the company I was at in the late eighties. If you notice the large circular coil around the
I.C. in the center. That is the coil (inductor) used for the capture. It acts like the antenna for the RF signals. I won't go into a long explanation
into how unless you want one. Better to see a YouTube vid. on it for the visuals. FYI, I am a RF engineer among other things.
As for cost; in volume production, these things could probably be made for around 1 cent each, and at most 5 cents each. But I suspect in true high
volume product, once mature, cost will be at, or even under 1 cent per unit.
FYI, since the die (micro chip) is so small, yields are expected to be very high at wafer-level testing...not affected much by defect density (large
die are greatly affected like a micro-processors). So packaging is the real cost here, and these are not real packaged, but rather bumped (bumps added
to bonding pads), flipped (turned upside-down) and bonded to the substrate circuit (wings with printed circuit on it). The wings are just a substrate
material (plastic) with circuits (metal traces printed/stamped) on it that are then cut/stamped out.
Knowing what a complex micro chip we were able to put out that was easily 10,000x more complex than this, and about the same die size for about 5
cents each. (not counting the package in this case). Is how I can estimate these costs.
Anyway, I how you learned something. These things are not really that expensive to make. It's the intellectual property IP that goes into them, and
all the testing and reliability for quality that makes them more expensive...plus greed
ff