printed circuit boards are used to simplify the process of circuit fabrication. A typical printed circuit board has predrilled holes for the electrical or electronic components to be placed into, and has integrated connective leads printed on the circuit board. However, an electrical or electronic circuit constructed on a circuit board requires that the devices--such as resistors--be soldered to the circuit board. Otherwise, the components can work loose if the circuit board is bumped or shaken accidentally.
Instructions
1 Place the resistor leads into the predrilled circuit board holes. Turn on the soldering iron, and wait for the iron to warm up (at least one minute).
2 Wipe the tip of the soldering iron on the wet sponge. Apply a small amount (approximately 1/4 inch) of solder to the soldering iron tip to coat it, and wipe the tip of the soldering iron to remove any excess.
3 Place the soldering iron at the electrical joint between the resistor and the circuit board hole for approximately 15 to 30 seconds. Quickly apply solder to the electrical joint--a small piece of solder should melt onto the joint. Place the soldering iron tip on the soldered joint, and wipe up any excess solder with the tip. Ensure that the soldered joint is shiny and flat (as opposed to dull and lumpy).
4 Wipe the soldering iron tip on the wet sponge. Repeat Step 3 for the other resistor lead connection. When finished, wipe the soldering iron tip on the wet sponge to remove any excess solder, and turn off the soldering iron.
