Sparkfun Electronics AD8232 Hook-Up Manual page 7

We'll connect five of the nine pins on the board to your Arduino. The five pins you need are labeled
GND, 3.3v, OUTPUT, LO-, and LO+.
Board
Pin Function
Label
GND
Ground
3.3v Power
3.3v
Supply
OUTPUT Output Signal
LO- Leads-off Detect - 11
LO+ Leads-off Detect + 10
SDN Shutdown
Page 7 of 15
Arduino Connection
GND
3.3v
A0
Not used