Human blood group type detection prototype focusing on agglutinin using microcontroller based photodiode

Blood is a fluid in the body that mainly serves as a medium for transporting 
various substances in the body. Detection of human blood group types with 
this microcontroller utilizes dark and light properties. The dark character 
appears due to agglomeration, while the light nature arises because of no 
agglomeration, for this to happen, a liquid reagent is needed. Administration 
of this liquid uses the aviator's breathing oxygen (ABO) system, which 
consists of reagent a, reagent b, and reagent c and mixing it with blood on 
the test paper. The number of blood samples in each reagent is based on 
blood lancet. Furthermore, the sensors used to detect these properties are 
photodiode and light emitting diode (LED) each of 3 pieces. The Arduino 
Uno is used to process sensor input while at the same time producing 
displayed human blood group type on the display screen. The test is carried 
out involving 12 blood samples and a medical officer. Medical officer are 
tasked reading directly the results of mixing between reagents and blood 
samples, after that are compared with the system. The results show that the 
deviation of the system reading is 0.167 for the sensor reading distance with 
the sample as far as 0.5 cm