温度計完成 on Arduino

前回の続きです。

Arduinoで温度計が完成しました。
Arduinoでは対数計算ができない(と思う)ので、OpenOfficeでサンプリング-温度のテーブルを作成しプログラムの中に載せることにしました。
ですのでテーブルばかりがデカいです。
それから作成したテーブルでカバーしている温度幅は-10.0℃から41.2℃までです。

あと、B定数ですがメーカーから出されてるもの(3435K)は25℃と85℃を基準にしているものなので、気温を測定するにはちょっと、と言うわけで0℃と25℃で計算し直しました。(3269K)

実際の温度とどのぐらいの誤差があるのかは分かりません。
趣味で補正をしていただける方がいらっしゃいましたら、ご連絡ください。

サーミスタは石塚電子株式会社の103AT-11です。
このサーミスタは温度が上がっていくにしたがい、抵抗値が下がっていくタイプです。

//----------------------------------------------------------------------------
// Ondosokutei
// 2010/10/29 http://blog.goo.ne.jp/soratobu_macaronipenguin
// Thermistor = Ishizuka Electronics Corporation 103AT-11
// B_teisuu 3435K -> 3269K ni henkou
// temp range -10.0 to 41.2

#include <LiquidCrystal.h>

LiquidCrystal lcd(12,11,5,4,3,2);
float temp_table[] = {41.2,41.1,41.0,40.9,40.7,40.6,40.5,40.4,40.2,40.1,40.0,39.8,39.7,39.6,39.5,39.3,39.2,39.1,39.0,38.9,38.7,38.6,38.5,38.4,38.2,38.1,38.0,37.9,37.7,37.6,37.5,37.4,37.3,37.1,37.0,36.9,36.8,36.7,36.5,36.4,36.3,36.2,36.1,35.9,35.8,35.7,35.6,35.5,35.4,35.2,35.1,35.0,34.9,34.8,34.7,34.5,34.4,34.3,34.2,34.1,34.0,33.8,33.7,33.6,33.5,33.4,33.3,33.1,33.0,32.9,32.8,32.7,32.6,32.5,32.3,32.2,32.1,32.0,31.9,31.8,31.7,31.6,31.4,31.3,31.2,31.1,31.0,30.9,30.8,30.7,30.5,30.4,30.3,30.2,30.1,30.0,29.9,29.8,29.7,29.5,29.4,29.3,29.2,29.1,29.0,28.9,28.8,28.7,28.6,28.5,28.3,28.2,28.1,28.0,27.9,27.8,27.7,27.6,27.5,27.4,27.3,27.1,27.0,26.9,26.8,26.7,26.6,26.5,26.4,26.3,26.2,26.1,26.0,25.9,25.7,25.6,25.5,25.4,25.3,25.2,25.1,25.0,24.9,24.8,24.7,24.6,24.5,24.4,24.3,24.2,24.0,23.9,23.8,23.7,23.6,23.5,23.4,23.3,23.2,23.1,23.0,22.9,22.8,22.7,22.6,22.5,22.4,22.3,22.2,22.1,21.9,21.8,21.7,21.6,21.5,21.4,21.3,21.2,21.1,21.0,20.9,20.8,20.7,20.6,20.5,20.4,20.3,20.2,20.1,20.0,19.9,19.8,19.7,19.6,19.5,19.3,19.2,19.1,19.0,18.9,18.8,18.7,18.6,18.5,18.4,18.3,18.2,18.1,18.0,17.9,17.8,17.7,17.6,17.5,17.4,17.3,17.2,17.1,17.0,16.9,16.8,16.7,16.6,16.5,16.4,16.3,16.1,16.0,15.9,15.8,15.7,15.6,15.5,15.4,15.3,15.2,15.1,15.0,14.9,14.8,14.7,14.6,14.5,14.4,14.3,14.2,14.1,14.0,13.9,13.8,13.7,13.6,13.5,13.4,13.3,13.2,13.1,13.0,12.9,12.8,12.6,12.5,12.4,12.3,12.2,12.1,12.0,11.9,11.8,11.7,11.6,11.5,11.4,11.3,11.2,11.1,11.0,10.9,10.8,10.7,10.6,10.5,10.4,10.3,10.2,10.1,10.0,9.8,9.7,9.6,9.5,9.4,9.3,9.2,9.1,9.0,8.9,8.8,8.7,8.6,8.5,8.4,8.3,8.2,8.1,8.0,7.9,7.8,7.6,7.5,7.4,7.3,7.2,7.1,7.0,6.9,6.8,6.7,6.6,6.5,6.4,6.3,6.2,6.1,5.9,5.8,5.7,5.6,5.5,5.4,5.3,5.2,5.1,5.0,4.9,4.8,4.7,4.6,4.4,4.3,4.2,4.1,4.0,3.9,3.8,3.7,3.6,3.5,3.4,3.2,3.1,3.0,2.9,2.8,2.7,2.6,2.5,2.4,2.3,2.1,2.0,1.9,1.8,1.7,1.6,1.5,1.4,1.3,1.1,1.0,0.9,0.8,0.7,0.6,0.5,0.4,0.2,0.1,0.0,0.0,-0.1,-0.2,-0.3,-0.5,-0.6,-0.7,-0.8,-0.9,-1.0,-1.1,-1.3,-1.4,-1.5,-1.6,-1.7,-1.8,-2.0,-2.1,-2.2,-2.3,-2.4,-2.5,-2.7,-2.8,-2.9,-3.0,-3.1,-3.3,-3.4,-3.5,-3.6,-3.7,-3.9,-4.0,-4.1,-4.2,-4.3,-4.5,-4.6,-4.7,-4.8,-4.9,-5.1,-5.2,-5.3,-5.4,-5.6,-5.7,-5.8,-5.9,-6.1,-6.2,-6.3,-6.4,-6.6,-6.7,-6.8,-6.9,-7.1,-7.2,-7.3,-7.5,-7.6,-7.7,-7.8,-8.0,-8.1,-8.2,-8.4,-8.5,-8.6,-8.8,-8.9,-9.0,-9.2,-9.3,-9.4,-9.6,-9.7,-9.8,-10.0};

void setup(){
lcd.begin(16,2);
}


void loop(){
int sampling;
lcd.clear();
lcd.setCursor(0,0);
sampling = analogRead(0);
lcd.print("Sampling ");
lcd.print(sampling);
lcd.setCursor(0,1);
lcd.print("Temp. ");
lcd.print(temp(sampling));
delay(1000);
}

float temp(int temp_sampling){
return temp_table[temp_sampling - 370];
}

//----------------------------------------------------------------------------

温度測定 on Arduino