Direct Coupled Amplifier Parts List

Part                Value        Tolerance        Quantity
Transistor NPN      BC548        -                6
Diode               1N4148       -                6
Resistor            1k           1%               3
Resistor            130          1%               3
Resistor            75           1%               3
Resistor            220          5%               3
Resistor            180          1%               1
Resistor            680          1%               1
Resistor            1k8          5%               1
Electro Capacitor   220u         -                1
Electro Capacitor   10u          -                1

subs: BC548 = BC549, PN100, 2N3904 or 2SC1815
      1N4148 = 1N914, any fast signal diode


Intelligent Direct Coupled Amplifier Parts List

All above plus...
Part                Value        Tolerance        Quantity
IC: Logic gate      74LS08       -                1
IC: PIC uC          12C508       -                1
IC: Voltage reg     78L05        -                1
Transistor NPN      BC548        -                1
LED                 Red          -                1
Resistor            1k           5%               1
Ceramic Capacitor   100n         -                1

subs: 12C508 = 12C509
      BC548 = BC549, PN100, 2N3904 or 2SC1815
      78L05 = 7805 or zener shunt regulator

**PIC uC requires programming