Components
Analog ECG front-end
A purpose-built 3-channel ECG analog front-end. Handles signal conditioning, amplification, and delta-sigma analog-to-digital conversion at high resolution.
BLE microcontroller
Compact dev board responsible for reading data from the analog front-end and transmitting it wirelessly to the PulseWave app over Bluetooth Low Energy.
Electrode interface
3.5mm audio jacks mounted on the front-end breakout board, connected to standard snap-type ECG leads for a 3-lead configuration.
Signal path
ECG electrodes pick up the electrical signal from the body. The analog front-end conditions and digitises it through its delta-sigma ADC. The microcontroller reads the digital output and streams it to the app over BLE in real time.
What's next
The breadboard stage validates the signal chain. Next steps are a custom PCB, proper electrode isolation, and power management for wearable form factor.