Donn Steward CPUville 8-bit Руководство по эксплуатации - Страница 4

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This is only about 1/8

applying the solder, it will drip down the lead to the other side of the board, and you can get

shorts. Plus, it looks bad.

4. Remove the solder first, wait a few seconds, then remove the soldering iron. Pull the iron tip

away at a low angle so as not to make a solder blob.

5. There are some pads with connections to large copper zones (ground planes) like these:

These require extra heat to make good connections, because the zones wick away the

soldering iron heat. You will usually need to let a 15-watt iron rest on the pin and pad for

more time before applying the solder (count to 10). You also can use a more powerful (30

watt) soldering iron.

6. The three main errors one might make are these:

1. Cold joint. This happens when the iron heats only the pad, leaving the lead cold. The

solder sticks to the pad, but there is no electrical connection with the lead. If this

happens, you can usually just re-heat the joint with the soldering iron in the proper way

(both the lead and the pad), and the electrical connection will be made.

2. Solder blob. This happens if you heat the lead and not the pad, or if you pull the iron up

the lead, dragging solder with it. If this happens, you can probably pick up the blob with

the hot soldering iron tip, and either wipe it off on your sponge and start again, or carry

it down to the joint and make a proper connection.

3. Solder bridge. This happens if you use too much solder, and if flows over to another

pad. This is bad, because it causes a short circuit, and can damage parts.

inch of the 0.032 inch diameter solder that I use. If you keep