Heart rate sensor example code https://os.mbed.com/users/donalm/code/PulseSensor/

Dependencies:   PulseSensor

Revision:
0:8d3802709c6c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PulseSensor.lib	Sun Nov 12 03:35:57 2017 +0000
@@ -0,0 +1,1 @@
+http://os.mbed.com/users/donalm/code/PulseSensor/#e80a245c4d0d