Paso 2: Dibujar el esquema
LTspice
http://www.linear.com/designtools/software/switchercad.jsp
Hacer el esquema del oído espía disponible por primera vez en la web en este instructable.
V1 N001 0 1.5
Q1 N006 N009 0 0 2N3904
Q2 N004 N008 0 0 2N3904
R6 N001 N004 4,7 k
Q3 N004 N005 0 0 2N3904
R7 N004 N008 200k
C4 N008 0 5n
Rà §VR1 N002 N003 5k
Rà §VR2 N003 N006 5k
R2 N001 N002 220
Cà §BigC N002 10à 0 Âμ
R8 N006 N009 200k
C1 N007 N009 .1Ã ÂΜ
R1 N002 N007 3,3 k
C2 N003 N008 .1Ã ÂΜ
Và §Microphone N007 0 SFFM (1u 0 2000 100 100) CA .1u
Rà §Earphone N001 N005 75
C3 N001 N005 .1Ã ÂΜ
.Model NPN NPN
.Model PNP PNP
.lib C:\Program Files\LTC\SwCADIII\lib\cmp\standard.bjt
.Tran 0 100ms 0 1ms
.backanno
.end