I have circuit ( see figure below). I need to find the total charge consumed by this circuit. Supply voltage = 9 V R1 = 1kOhm R2 = 47 kOhm R3 = 100 kOhm T = NPN Transistor (BC 337) C = 22 uF IR (E) = IR emitter (IRL 80 A); FOrward current = 60mA; IR (R) = IR receiver (LPT 80 A); Relay = 12V relay. WHat does the relay do? Also i would like to know how to choose appropirate values for R1, R2 R3 and C.