added some stuff

DS1621/DS1621.ino

@@ -0,0 +1,43 @@
+#include <Wire.h>
+
+#define DEV_ID 0x90 >> 1                        // shift required by wire.h
+
+
+void setup()
+{
+    Serial.begin(9600);
+
+    Wire.begin();
+    Wire.beginTransmission(DEV_ID);             // connect to DS1621 (#0)
+    Wire.write(0xAC);                            // Access Config
+    Wire.write(0x02);                            // set for continuous conversion
+    Wire.beginTransmission(DEV_ID);             // restart
+    Wire.write(0xEE);                            // start conversions
+    Wire.endTransmission();
+}
+
+
+void loop()
+{
+    int8_t firstByte;
+    int8_t secondByte;
+    float temp = 0;
+
+    delay(1000);                                // give time for measurement
+
+    Wire.beginTransmission(DEV_ID);
+    Wire.write(0xAA);                            // read temperature command
+    Wire.endTransmission();
+    Wire.requestFrom(DEV_ID, 2);    // request two bytes from DS1621 (0.5 deg. resolution)
+
+    firstByte = Wire.read();           // get first byte
+    secondByte = Wire.read();    // get second byte
+
+    temp = firstByte;
+
+    if (secondByte)             // if there is a 0.5 deg difference
+        temp += 0.5;
+
+    Serial.println(temp);
+
+}