CHAPTER 22 ■ SOLDERING AND CONNECTINGFigure 22-6. Wire and terminal soldered together
If you aren’t happy with the shape or shine of the joint, simply reheat it with the soldering iron tip and
let the joint cool again. Additional solder is not necessary, just the soldering iron tip. This usually corrects
mistakes and allows the molten solder to reflow thoroughly.
If you’ve applied too little solder, reheat the joint and apply additional solder wire. If you’ve applied too
much solder, reheat the joint and use the desoldering bulb to remove excess. Occasionally it’s cleaner to remove
almost all of the solder at the joint and then apply the desired amount of fresh solder from the solder wire.
- Repeat these steps to solder the black wire to the negative terminal.
- Repeat these steps to solder the white and black wires to the other motor.
- Test that the wires are attached correctly by connecting them briefly to a
9 V battery. The motor should spin.
In Soldering, Practice Makes Perfect
How did the soldering turn out? If it didn’t turn out as well as you hoped, don’t despair. Good soldering
takes practice.
One of my first soldering experiences was to construct a 32-byte read-only memory panel out of
256 diodes (see Figure 22-7). It took 816 solder joints to complete. During testing I discovered half a dozen
disconnected or intermittent solder joints. After carefully reheating each one (and a few I didn’t trust), the
board worked like a charm.