Distortion PlusThe Distortion + has the ability to generate various personalities of overdrive, distortion or fuzz, depending on the way you play the guitar. This popular pedal is one of the DIY classics.
PCB ASSEMBLY Step 3 of 4
You should use a soldering pencil of 15-30W and solder wire of 1 mm diameter. The soldering will release fumes that are harmful to your eyes and lungs, work always in a well-ventilated environment and avoid breathing the generated smoke.
Warm up the soldering iron and clean it with a humid sponge before start soldering. Place the component and firmly hold the PCB. Heat the PCB pad and the component leg simultaneously with the soldering pencil. Then, melt 1-3 mm of solder wire on the joint and make sure it flows properly on both pad and component leg. Finally, cut the remaining of the component leg and inspect the joint. If the solder has not been applied correctly, you can make a bad connection (cold solder joint). A good connection should cover the joint without touching any adjacent pad.
Place the components over the footprints following the designators. It is possible to place the components on both PCB sides if required, just be careful to keep their correct polarity. It is recommended to solder the components from small to big: resistors, diodes, capacitors, transistors, potentiometers...
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 polarity is also marked for the negative pin. Additionally, the longer leg is the positive and shorter the negative. The marked 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 an 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 type number marked on them. This two terminals component has polarity; a ring near the side indicates the cathode. This ring is marked as a line to indicate the correct polarity 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 the potentiometers. Their value is indicated on them. Use a small screwdriver to adjust them.