And with the Raspberry Pi device, Pulse-Fi can apparently determine a person's heart rate in about five seconds. Scanning a heart rate sans wearable is exciting, especially considering that it can be done with a low-power, low-cost device like the Raspberry Pi. The latest generation of the Raspberry Pi is the Pi 5. Although earlier versions of the Raspberry Pi could be had for $30, the Raspberry Pi 5seems to reflect the general uptick in PC hardware prices. And the Raspberry Pi 6 with 16GB of memory has a price tag of $119.95.