Ah, but of course. How could I forget about my trusty pocket doppler laser interferometer!
This is a "high school project funded with pocket money" level of DIY, with €25 of parts.
Yours is not built in to your watch? You should go and have words with Q.
Microwave beam-forming says what?
Included in the next version of Flipper. /s
This is a "high school project funded with pocket money" level of DIY, with €25 of parts.