Heartbeat Watch
Casio Heartbeat Watch 1988
back in 1988, when i was 20, i bought a heart rate monitoring watch by Casio for ~$250. You wear a strap with electrodes on your chest, and it transmits to the watch your heart beat. I wore it 24/7, for like 5 years. I was to become a borg. But today, no thanks.
of heart beating watchers, the old tech do by measuring skin resistance. i.e. a belt with electrodes around your chest, emit radio signal.
![casio heartbeat watch 20200603 6tDnW](i/casio_heartbeat_watch_20200603_6tDnW.jpg)
i don't remember the Model. If anyone knows, please let me know.
![casio heartbeat watch 20200603 Cn4FF](i/casio_heartbeat_watch_20200603_Cn4FF.jpg)
![casio heartbeat watch 20200603 m5Zg5](i/casio_heartbeat_watch_20200603_m5Zg5.jpg)
fitbit heart beat
another ad tile on win 10 startup menu is “fitbit coach”. The thing it tries to sell is this
![fitbit charge 3 0eb65-s525x685](i/fitbit_charge_3_0eb65-s525x685.jpg)
this thing, monitors your heart rate, steps, sleep pattern. it's designed for yuppies who think wearing it can kick you into action.
![fitbit charge back 56ade](i/fitbit_charge_back_56ade.jpg)
Modern ones, do by optics. It shines light into your skin and look at the blood vessel pattern.
on the topic of heart beat, one must now read: “The Tell-Tale Heart” By Edgar Allan Poe