Klon BufferThis simple and effective buffer improves the high frequency degraded by long cables or pedal chains.
Designators and components Step 2 of 4
1 x KLON BUFFER DIY PCB GUITAR EFFECT
C1 220n 220NF 0.22UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2 47u 47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C3 1u 1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
D1 LED LED 3MM RED
OPAMP TL071 TL071 OPERATIONAL AMPLIFIER J-FET PDIP-8 TL071CP
R1 100k 100K OHM 1/4W 1% METAL FILM RESISTOR
R2 100k 100K OHM 1/4W 1% METAL FILM RESISTOR
R3 1M 1M OHM 1/4W 1% METAL FILM RESISTOR
R4 100k 100K OHM 1/4W 1% METAL FILM RESISTOR
R5 560 560 OHM 1/4W 1% METAL FILM RESISTOR
R6 3.3k 3.3K OHM 1/4W 1% METAL FILM RESISTOR
GENERAL DESCRIPTION OF COMPONENTS
The resistors should be ¼ Watt metal type. You can either use a multimeter or the color bands to obtain their values. 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.
The 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.
The ceramic 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 assemble them in any direction.
Tantalum capacitors have the value printed on them. The polarity is marked for the positive pin. Additionally, the longer leg is the positive and shorter the negative. Assemble the tantalum capacitor according to the positive polarity (+) marked on the PCB.
Integrated Circuits (ICs) have their model printed on them. A notch half-circle or a dot indicates the correct position of the IC 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.
Trimpots are similar to potentiometers. Their values are printed on them. Use a small screwdriver to adjust them.