Mini Guitar AmpThis mini guitar amplifier is perfect as a home practice amp. It has gain and volume control, offering a very dynamic sound.
Designators and components Step 2 of 4
PCB MINI GUITAR AMP PCB
C1 47n 47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2 47n 47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3 220u 220UF 25V ELECTROLYTIC CAPACITOR 8X12MM
C4 100n 100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C5 100u 100UF 35V ELECTROLYTIC CAPACITOR 6X11MM
C6 100n 100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR (Boost optional)
D1 LED LED 3MM GREEN
Place a 100nF capacitor on C6 and wire a switch to Sw.
GENERAL DESCRIPTION OF COMPONENTS
Use a multimeter or the color bands to obtain the resistance value. Resistors do not have polarity, you can place them in any direction.
Electrolytic capacitors have their value printed on them. The negative polarity pin is indicated by a white strip along the can. They also have a longer leg indicating the positive pin. The maximum voltage rating never can be exceeded, make sure you are using at least double voltage rating than your power supply. For example, if you are using a 9V power supply, use a electrolytic capacitor with at least 18V maximum voltage rating.
Polyester capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can place them in any direction.
Integrated Circuits (ICs) have their model printed on them. A notch half-circle or a dot indicates the correct position on the PCB.
Diodes have their model printed on them. The polarity (cathode) is indicated by the ring near the side. This ring is also marked on the PCB.
Led diodes have polarity, the cathode is indicated as a flat surface on the side of the diode and also it is the shorter led. On the PCB, the cathode is marked as a flat side and anode as a round side.
Transistors are three terminals components and their model is printed on them. To indicate the correct orientation, one side of the transistor is flat and the other one is round.
Potentiometers have their resistance value marked on them. They are marked with A, B or C for logarithmic, linear and reverse logarithmic, respectively.