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I remember, as a small child, building a powerless radio that vibrated the speaker using the strength of the radio transmission itself. Is ambient backscatter i
by s_q_b 13y ago
I remember, as a small child, building a powerless radio that vibrated the speaker using the strength of the radio transmission itself. Is ambient backscatter is the same thing, except across much wider frequencies ranges?
- Stwerp 13y agoBackscatter refers to reflecting RF power. Ambient backscatter is modulating the reflections of the ambient RF signals as opposed to beaming a signal in from a source as RFID does. The device you built uses the incoming signal to power the device as well as drive the speaker. The devices in this article are using the incoming RF signal to both power the device as well as reflect for wireless communication.
- jzelinskie 13y agoYou're talking about Crystal Radios[0], right? [0] https://en.wikipedia.org/wiki/Crystal_radio https://en.wikipedia.org/wiki/Crystal_radio
- s_q_b 13y ago:) Yes, I am. It was part of an electronics kit my father bought for me. I remember carefully placing the pieces between spring-end contacts to construct the basic circuits. Building electronics from scratch is very satisfying. I think I may get into DIY drones soon to scratch that itch.