[FIDOCAD]
FJC B 0.5
MC 115 60 2 0 ey_libraries.pasres0
MC 125 60 0 0 ey_libraries.trnbjt0
MC 130 55 3 0 010
MC 130 70 1 0 ey_libraries.didled0
MC 130 85 1 0 ey_libraries.pasres0
MC 130 95 0 0 elettrotecnica.ms05
TY 110 46 4 3 0 0 0 * R3
TY 70 55 4 3 0 0 0 * Uscita 555
TY 100 65 4 3 0 0 0 * 68 ohm
TY 130 40 4 3 0 0 0 * 4.5 V
TY 140 85 4 3 0 0 0 * 2.2 ohm
MC 135 85 1 0 ey_libraries.pasres0
LI 130 80 135 80 0
LI 135 95 130 95 0
SA 130 80 0
SA 130 95 0
TY 105 85 4 3 0 0 0 * 2.2 ohm
BE 135 55 140 60 135 65 135 65 2
FCJ 3 0 3 2 0 0
TY 140 60 4 3 0 0 2 * 0.3 V
TY 140 55 4 3 0 0 2 * Vcesat=
TY 145 70 4 3 0 0 2 * Vled = 3.6 V
TY 145 75 4 3 0 0 2 * @600 mA
BE 140 70 145 75 140 80 140 80 2
FCJ 3 0 3 2 0 0
BE 165 85 170 90 165 95 165 95 2
FCJ 3 0 3 2 0 0
TY 170 85 4 3 0 0 2 * 0.66 V 
TY 170 90 4 3 0 0 2 * @600 mA
TY 95 105 4 3 0 0 2 * 0.3 + 3.6 + 0.66 = 4.56 V