Yes, such a tool is remarkably useful.

Put one together on 4th December, using an MLX90614 and ATmega328, for
a demo at a school; here's my quick hack Arduino code;

-- cut here --

#include <Wire.h>

void setup() {
  Wire.begin();
}

void loop() {
  Wire.beginTransmission(0x5a);
  Wire.write(7);
  Wire.endTransmission(false);

  Wire.requestFrom(0x5a, 3);
  uint16_t ret =3D Wire.read() | (Wire.read() << 8);
  uint8_t pec =3D Wire.read();  // ignored

  uint32_t temp =3D ret * 20L - 273150L;

  tone(A0, temp/25);

  delay(10);
}

-- cut here --

The deltaK adds calibration, wider range, and portability.

Pledged, thanks.

--=20
James Cameron
http://quozl.netrek.org/
--=20
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