yasser11
Newbie level 4
l14g3 help circuit
Hi
I am using photodiode TIL 38 as an infrared source and using L14G3 as a detector. Between the diode and the detector I am keeping my finger so that the output at collector will vary according to the change in blood volume in the finger. By this i intend to measure the heart rate.
Can anyone help me in biasing the ckt. because I think I am not biaising it correctly. I am unable to get any output at the collector(it's totally random and no way near to what I am expecting) , also sometimes 50Hz wave (power supply noise) comes at the collector.
If anybody has any idea how to overcome these problems then do reply.
Hi
I am using photodiode TIL 38 as an infrared source and using L14G3 as a detector. Between the diode and the detector I am keeping my finger so that the output at collector will vary according to the change in blood volume in the finger. By this i intend to measure the heart rate.
Can anyone help me in biasing the ckt. because I think I am not biaising it correctly. I am unable to get any output at the collector(it's totally random and no way near to what I am expecting) , also sometimes 50Hz wave (power supply noise) comes at the collector.
If anybody has any idea how to overcome these problems then do reply.