[No.9]暗くなったら自動的に点灯!〜レインボーライトを作ろう
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/R5OqXcPWkPM9uQiakKkCG.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=LDA5HPPEgyBtsSk262OIQsuxvhU%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
小さなものづくりコンピューター「SPACEBLOCK(スペースブロック)」は、いろいろなパーツを足してプログラムを工夫してさまざまな機能を作ることができます。今回は「明るさセンサモジュール(明るさセンサ)」を使って暗くなったら自動的に点灯するライトを作りましょう。前回[SPACEBLOCK-8]で覚えた「繰り返し」と、新たに「条件分岐」の技を使ってプログラミングしますよ。
必要なもの&準備
- SPACEBLOCK通常パッケージ[SPACEBLOCK本体、USBケーブル、電池ボックス]
- 8×8 RGB LEDマトリックスパネル(LEDパネル)
- ジャンパーワイヤ[ピンヘッダ-ピンソケット3本]
- 明るさセンサモジュール(明るさセンサ)
- プログラミングをするパソコン
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/XPoXIkOVTIHkkOiEbluAT.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=KpdqKB%2B5t1S0F6PKLY%2FpKCCeVtE%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
SPACEBLOCKに拡張パーツを接続する
まずは、今回使用するLEDパネル、明るさセンサをSPACEBLOCKに接続してみましょう。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/9ykT8Ob45XMAAahKO3cIB.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=aOzt62c8fgVheOsjI7b7JQqP788%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
細かい部分は次の図を参考にしてください。明るさセンサからは3本のワイヤが出ていますので、黄色ピンソケットの図の通りの位置に接続してください。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/83Mv5KHyTrlrHUONwbhhN.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=9QOtg7NHnN9nw%2BNqMkc%2FPuIpIpA%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
明るさセンサって何ができるの?
明るさセンサは、明るさを測定して数値化することができます。一番暗い状態が0で、明るくなるほど数値は大きくなります。このように、明るさなどの程度を測定し数値にしてプログラムに渡すことをアナログ入力と呼びます。
明るさセンサは、測定した明るさに応じてSPACEBLOCKに挿したピンヘッダの電圧を上げたり下げたりします。電圧の程度に応じて0から1023までの数値に置き換えてプログラムに値を渡しています。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/mxAumyyOQt8IutkIiXe0s.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=Qm%2Bqvcoso%2F%2FGg0jMtszgF0ouz9Q%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
明るさセンサの値は、[入力]カテゴリーの[《A0》の電圧をアナログ読取]というブロックで取得します。まずは明るさセンサが測定した値を表示するプログラムを作りましょう。次の図の通り[基本]カテゴリーの[数字《0》を表示]ブロックと組み合わせてください。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/Vb5Dkzh5jWu3PU8Yut69X.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=QbMJekXilWzlVE3e%2B%2FxzMx7cZ0E%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
[《A0》の電圧をアナログ読取]ブロックをクリックするとピンソケットの一覧が表示されるので、「B0」を選びます。同時に、明るさセンサを図の通り接続していることを確認してください。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/is8jogxqffXzEnkS1aYJN.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=%2BgtjroqU06mAVpJHdFEvhDJ%2BKJ4%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
明るさセンサの測定値を見てみよう!
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/r5rB-8Kt8uCnUvVeZk8GQ.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=%2Bnj6tW5GEB4I2KGbuCMaFKOoNvQ%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
昼間の自然光が入る室内で実行したところ、値は300でした。明るさセンサの向きや場所を変えてプログラムを実行すると、また違う値が表示されます。
上の図のプログラムでは実行した瞬間の明るさセンサの値しかわかりません。常に値を表示させるようプログラムをアレンジしましょう。次の図の通り、[繰り返す]ブロックを追加してください。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/rpb8tsYHY7jcFODDyVNnL.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=tMRLCeGIdBf8jdClMApQHodTrR8%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
上の図のプログラムを実行すると、値を繰り返し表示し続けるので、コンソールに値が次々に流れていきます。
明るさセンサに手をかざしたりライトをあてたりすると、リアルタイムで測定値が変化するのがわかるので試してみましょう。どのくらいの明るさでどのくらいの数値になるでしょうか? センサ部分を完全にふさぐと「0」になりますよ。
暗くなったらLEDパネルが点灯する装置
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/_uF1JfkrLL5fUAYuqETnl.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=VSIwQe0QnWDyJxfPojRNRAfr2Uo%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
プログラムでは「なんとなく暗くなったら」「夕方くらいの暗さになったら」「適当に常識的に判断して」という指示はできません。「明るさセンサの値が○よりも小さいなら」と具体的な数字で表現します。
明るさセンサの値がいくつより小さい状態を「暗い」ということにするのかは、プログラマーである皆さん次第。置きたい場所の環境によって適正な値は違うので、自分でいろいろな値を試して決めてください。今回は、「玄関の電気を消したら点灯する」ことを目的として試し、50としました。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/uZjPRjx3PMlIkQo47ShQ0.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=tHnP1YQCHnHquSP%2FTaFMEBa5nEA%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
「論理」カテゴリーのブロックを使うと、設定した条件が「はい」の状態のときと「いいえ」の状態のときで実行する命令を分けることができます。これを「条件分岐」と呼びます。何を条件にするかによって、さまざまな仕組みを作ることができます。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/YIVTAg_rh7mAR6R-kqtOt.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=ia45dfvakDxNSboVKBWssuWoI54%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/5QOkJnAcCu6lvZDb_qhFH.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=eBlX50WP4JVqFGBrCVlcLIB8D8E%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/8GJxam3xx1KgAMlIYCI26.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=idD%2BcAvO7AgS3V3JC9VSE7%2F30Fg%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/8FDTlkCIYBe5Hud38mKTl.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=zaoJP0njz1jAvRjdVJDxO4MANu0%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
動画でご覧ください。
![](https://s3.ap-northeast-1.amazonaws.com/spaceblock.jp-storage/inquiries/2024-03-26/CWRjngqakJ2nva19iqxG7.png?AWSAccessKeyId=ASIAZZVIWFLRVSGIWVHT&Expires=1722069224&Signature=dAjU01X5yEtH5dbOT78Kvqs6hug%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEA4aDmFwLW5vcnRoZWFzdC0xIkcwRQIhANWG0hH%2BhZXvNjQEdV8ZIB6mY0ZoTxnWbfeF4xpkTwIBAiAPLgtPdzdI6u8LbSTAxtSysYCVeE4BWUGwj7jaD0r5DiqdAwjo%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAEaDDY3MzU4OTg5Nzk1NSIMYSZ5O0mdf4BJcehAKvECbNUvOfstx3wm8wqEqsvbs%2FokVjbuxT8AUoEi36UMNF8osU5aDWm7GMd80h69NzJ4iT4sxFhKvKDs%2BrzY2CkD90cjJ%2Fts5xXrR%2F2eg5vjQAj%2FTslh9BvFLZ3CHPyhxfXkoJ%2BbGiMgdCO%2FpKxe21wxF2Vc7RjlTijMD8FNaOq5rheChwbt2RO10LeI9lElMWd%2F2%2BGFG3cSPIQOoQqStXfATNplFenzs0do7i%2B9nHXJjL84xsqHBFeelvKWOj5Sh2h%2Fhm%2BRtkjXi1DS4PB4Haz7SAyU46XQN3QMgCV%2Fs9O0zDJY5TStZbKBWZ4XiCkceYvWyFLf4xyj8pjj4xPPT7sIuZ6D2qZLIbiRqEewY4KiL75SaE2ry%2Bdh0rPQiiYCkYa0BWsftTWfLS%2BKWSZRGx97UxOSbsW20y0fv6X%2FE6V7ifB%2FEFzU8mI%2Fu%2Flxh07MoW5JzFMtQ5R35LKbjvk7s%2FrCKCLNh5HLFeFWtHLv8hh4AAdDMMGkkrUGOp0BvVBhvk98mfWnh%2BlUXJNkiP%2Fb25ptW8RkpiifX1bBMyg2ULFb8yRVKXZpZKgkMiF5%2Bn4uAbI3WDODZpWI5ef5c684CtZVlEofXi%2FWq%2B7jcKWRIuPVxiomqyV8OCUNznBE8FmrnJ8EqLCFFg1YflLIDN2PxzdFeDB%2FjuvtVytwoG3P9MtdxfNZ38fOtWHgtu1vkueuWzdk8gSz3o%2Bk%2Fw%3D%3D)
同じ場所に置いていても、明るさセンサをどんな位置や向きに設置するかによって、測定の値は変わりますから、設置の仕方に応じて条件の値を変えたり、センサの配置を変えたりして工夫してみましょう。
動画でご覧ください。