4 ms·
There are some that detect heartbeat, I guess those might work. But those are mmWave, not just cheap 2.4GHz radars or PIR.
by Avamander 2y ago
There are some that detect heartbeat, I guess those might work. But those are mmWave, not just cheap 2.4GHz radars or PIR.
- stavros 2y agoI've got LD2410B, which are mmWave, so they should detect heartbeat (and do), but not from more than 2-3m away.
- transpute 2y agoIs the LD2410B sensing range limited by the PCB antenna?
- stavros 2y agoI'm not sure, it always just made sense to me that the farther away someone is, the harder it'll be to detect their small movements.
- transpute 2y agoSmallness detection depends on RF: higher frequency = shorter wavelength = more resolution for imaging. Detection range without obstacles depends on transmit power and signal reception. There are other models in the same family which might have more power/range.