вот хорошая ссылка, там есть картинка, на ней все понятно. http://forum.arduino.cc/index.php?topic=114307.0
Теперь у меня такая проблема: Arduino: 1.6.1 (Windows 7), Плата"Arduino Uno" sketch_mar14a.ino:3:9: error: macro names must be identifiers sketch_mar14a.ino:4:9: error: macro names must be identifiers sketch_mar14a.ino:5:9: error: macro names must be identifiers sketch_mar14a.ino:6:9: error: macro names must be identifiers sketch_mar14a.ino:7:9: error: macro names must be identifiers sketch_mar14a.ino:18:3: error: invalid suffix "attach" on floating constant sketch_mar14a.ino:18:12: error: invalid suffix "_PIN" on integer constant sketch_mar14a.ino:19:3: error: invalid suffix "attach" on floating constant sketch_mar14a.ino:19:12: error: invalid suffix "_PIN" on integer constant sketch_mar14a.ino:20:3: error: invalid suffix "attach" on floating constant sketch_mar14a.ino:20:12: error: invalid suffix "_PIN" on integer constant sketch_mar14a.ino:21:3: error: invalid suffix "attach" on floating constant sketch_mar14a.ino:21:12: error: invalid suffix "_PIN" on integer constant sketch_mar14a.ino:22:3: error: invalid suffix "attach" on floating constant sketch_mar14a.ino:22:12: error: invalid suffix "_PIN" on integer constant sketch_mar14a.ino:27:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:32:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:35:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:38:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:40:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:41:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:42:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:43:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:45:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:46:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:47:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:48:3: error: invalid suffix "write" on floating constant sketch_mar14a.ino:9:7: error: expected unqualified-id before numeric constant sketch_mar14a.ino:10:7: error: expected unqualified-id before numeric constant sketch_mar14a.ino:11:7: error: expected unqualified-id before numeric constant sketch_mar14a.ino:12:7: error: expected unqualified-id before numeric constant sketch_mar14a.ino:13:7: error: expected unqualified-id before numeric constant Ошибка компиляции. Это сообщение будет содержать больше информации чем "Отображать вывод во время компиляции" включено в Файл > Настройки
ну тогда и шар не поможет. в вашем случае работает пословица на кода нет и суда нет p.s. вы у врача тоже через интернет лечитесь?