2 Micro-cap III Spectrum Software STD 52 Resistor 12,11,7,1,1,2,R1 Resistor 18,11,7,1,3,4,R1 Resistor 24,11,7,1,5,6,R1 Resistor 30,11,7,1,7,8,R1 Resistor 36,11,7,1,9,10,R1 Resistor 42,11,7,1,11,12,R1 Resistor 48,11,7,1,13,14,R1 Resistor 54,11,7,1,15,16,R1 Resistor 12,17,0,1,2,4,R2 Resistor 18,17,0,1,4,6,R2 Resistor 24,17,0,1,6,8,R2 Resisto,0,1,8,10,R2 Resistor 36,17,0,1,10,12,R2 Resistor 42,17,0,1,12,14,R2 Resistor 48,17,0,1,14,16,R2 Resistor 6,17,0,1,0,2,R1 Ground 4,17,7,-1, Short2 4,17,0,-1, Capacitor 47,29,3,1,17,18,C1 Resistor 47,29,7,1,17,0,R1 Resistor 53,29,2,1,19,17,R3 Resistor 59,29,2,1,20,19,R3 Resistor 65,29,2,1,21,20,R3 Capacitor 53,35,3,1,0,19,C2 Capacitor 59,35,3,1,0,20,C2 Capacitor 65,35,3,1,0,21,C2 Short12 59,35,2,-1, Short6 59,35,4,-1, Ground 47,35,7,-1, NPN 31,29,6,2,22,23,24,Q1 Capacitor 31,38,5,1,25,23,C3 Short6 22,32,4,-1, Resistor 19,35,0,1,26,0,VR Ground 26,35,7,-1, Short2 22,32,7,-1, Short4 24,26,0,-1, Short4 15,35,0,-1, Short1 26,35,2,-1, Short6 31,29,5,-1, Short1 31,39,3,-1, Short4 31,28,1,-1, Short4 69,29,2,-1, Ground 60,14,7,-1, Short3 60,14,5,-1, Short4 43,23,0,-1, Short4 35,23,2,-1, Short1 39,21,3,-1, Short12 39,20,0,-1, Short3 51,20,0,-1, Short3 54,20,3,-1, Short4 15,40,4,-1, Ground 19,40,7,-1, 0 36 3,34,-1,Pin 4 3,36,-1,Serial port 10,25,-1,Pin 15 10,27,-1,Parallel port 29,41,-1,Audio input 70,29,-1,Audio 50,38,-1,Low pass filter 37,27,-1,High 37,29,-1,pass 37,31,-1,filter 12,11,1,2 18,11,3,3 24,11,5,4 30,11,7,5 36,11,9,6 42,11,11,7 54,11,15,9 48,11,13,8 24,8,-1,Pins parallel port 4,11,-1,DAC 28,23,-1,ADC 70,31,-1,output 60,11,0,18 36,23,-1,Switch 47,23,18,DAC 3,41,-1,Serial port 3,39,-1,Pin 7 4,48,-1,R1 = 2 R2 = 22 k 4,50,-1,R3 = 1 k 25,48,-1,C1 = 22 uF 25,50,-1,C2 = 220 nF 25,52,-1,C3 = 560 pF 4,52,-1,VR = 10 k 41,48,-1,Q1 = Any bipolar silicon 46,50,-1,NPN transistor 15,4,-1,DAC-ADC by Luis Padilla VisdĒmine (1995) 7 12 7 5 10 3 0 3 0 0 5 3 6,2,53,77 0 0 0 0 0