Red Llama

PCB DESIGNATORS

PCB
PCB              RED LLAMA DIY PCB

Resistors        
R1    1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R2    100k     100K OHM 1/4W 1% METAL FILM RESISTOR
R3    100k     100K OHM 1/4W 1% METAL FILM RESISTOR
R4    1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R6    1k         1K OHM 1/4W 1% METAL FILM RESISTOR

Capacitors        
C1    68n       68NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    50p       50PF 50V CERAMIC DISC CAPACITOR
C3    33n       33NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    100p     100PF 50V CERAMIC DISC CAPACITOR
C5    10u       10UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C6    100u     100UF 35V ELECTROLYTIC CAPACITOR 6X11MM

IC
U1    CD4049     CD4049UBE IC HEX BUFFER/CONVERTERS

Diodes
D2    1N4001      1N4001 DIODE 1A 50V

Potentiometers
GAIN    1M-B      1M OHM LINEAR TAPER POTENTIOMETER
VOL     10k-A      10K OHM LOG TAPER POTENTIOMETER

PCB

PCB SCHEMATIC

MODIFICATIONS

Increase the gain by reducing R2 to 10k, or increasing R3 to 10M.

GENERAL DESCRIPTION OF COMPONENTS

Resistors

Resistors don't have polarity, so you can place them in any direction. Determine their resistance value by using a multimeter or by reading the color bands.

Electrolytic capacitors

Electrolytic capacitors have their value and maximum voltage rating printed on the body. The negative pin is indicated by a white stripe along the can, and it also has a shorter leg. The longer leg is positive. Never exceed the maximum voltage rating. Ensure the capacitor's voltage rating is at least double that of your power supply (e.g., use an 18V capacitor for a 9V power supply).

Polyester capacitors

Polyester capacitors don't have polarity and can be placed in any direction. Their value is marked using a three-number code. The first two numbers represent the first and second digits of the value, and the third number is the multiplier code (read in picofarads, pF).

Ceramic capacitors

Ceramic capacitors don't have polarity and can be placed in any direction. Their value is marked using a three-number code. The first two numbers represent the first and second digits of the value, and the third number is the multiplier code (read in picofarads, pF).

Integrated Circuits

Integrated Circuits (ICs) have their model number printed on them. A notch, a half-circle, or a small dot indicates the correct orientation on the PCB.

Diodes

Diodes have their model number printed on them. The polarity (cathode) is indicated by a stripe or ring near one end. This ring corresponds to the polarity marking on the PCB.

Led diodes

LEDs (Light Emitting Diodes) have polarity. The cathode is indicated by a flat edge on the side of the LED's plastic casing and a shorter leg. The longer leg is the anode. On the PCB, the cathode is marked with a flat side and the anode with a round side.

Potentiometers

Potentiometers have their resistance value marked on them. They are also marked with a letter to indicate their taper: A for logarithmic, B for linear, and C for reverse logarithmic.