Woodrow

PCB DESIGNATORS

PCB                 GUITAR BOOST PCB

Resistors        
R1    1M           1M OHM 1/4W 1% METAL FILM RESISTOR
R2    2.2M        2.2M OHM 1/4W 1% METAL FILM RESISTOR
R3    Jumper
R5    330          330 OHM 1/4W 1% METAL FILM RESISTOR
R6    Jumper
R7    3.3k         3.3K OHM 1/4W 1% METAL FILM RESISTOR
R8    Jumper

Capacitors        
C1    22n          22NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3    100n        100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    47u          47UF 25V ELECTROLYTIC CAPACITOR 5X11MM

Transistor
Q1    2N5088    2N5088 GERENAL PURPOSE TRANSISTOR

Diodes
D1    1N4148    1N4148 SWITCHING SIGNAL DIODE
D2    1N4148    1N4148 SWITCHING SIGNAL DIODE

Potentiometer
VOL   500k-A    500K OHM LOGARITHMIC POTENTIOMETER

PCB

     

 

PCB SCHEMATIC

 

The table below lists several projects you can build with the DH.A8 PCB.

 

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).

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.

Transistors

Transistors are three-terminal components with their model number printed on them. To ensure correct orientation, one side of the transistor's body is flat while the other is curved.

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.