How to Connect Resistors

Connecting Through-Hole Resistors

1). Turn on your soldering iron and allow it to come to operating temperature. As the iron is heating, create 90-degree bends of the resistor wires, making the bends about 1/8-inch away from the resistor body. Bend the wires so they are both pointing downward in the same direction.
2). Locate the two holes on the circuit board from which the old resistor was removed. Slide one wire through one hole, and slide the other wire through the other hole until the resistor body is resting on the circuit board. Do not worry about which direction the resistor wires are placed, as resistors do not require any attention to polarity direction.
3). Touch the tip of your soldering iron to both the wire bend on one side of the resistor and the metal circuit board "pad" which surrounds the hole. Heat both at the same time for between three and five seconds. Touch your solder wire to the location where the wire meets with the pad. Allow the solder to fill in the hole, making a connection between the pad and the resistor wire. Remove the soldering iron and solder the wire on the other side of the resistor in like fashion.
4). Use a pair of wire cutters and snip all but 1/8-inch of the wire leads that are hanging out the other side of the circuit board. Cut the wires flush with the solder for the cleanest result.

1). Turn on your soldering iron. Allow it to come to full operating temperature. While the soldering iron is heating, apply a small amount of solder paste (also called paste-solder) to each surface-mount pad where the metal contacts of the new surface-mount resistor will rest.
2). Gently set the surface-mount resistor onto the circuit board so each metallic ends is resting on the pasted pads. Be sure the metal ends are centered evenly, and the resistor is directly over the pads and not off to the sides of them.
3). Touch one metal end of the surface-mount resistor just long enough that it causes the silver paste to turn into a watery chrome-like consistency (it will look wet). Quickly remove the soldering iron tip and allow the new solder joint to cool for 15 to 20 seconds. Heat the other metal end in like fashion.