Results tagged #Heart Rate in Circuits

Cadmium sulfide photoresistor CD1 fingertip can be detected through the filter, CD1 form the sense amplifier feedback network, a part of th...

Strictly speaking, this simple circuit shouldn t work! How could anyone expect an ordinary light dependent resistor photo cell to ‘see...

Here is the inside of the light reflectance sensor (top) and a schematic drawing of it's circuitry (bottom). First, carefully remove the pho...

Here is the inside of the light reflectance sensor (top) and a schematic drawing of it's circuitry (bottom). First, carefully remove the pho...