  We describe a set-up for measurement of the absolute zero by Johnson-Nyquist
thermal noise which can be performed within a week in every high-school or
university. Necessary electronic components and technical guidelines for the
construction of this noise thermometer are given. The operating temperature
used is in the tea cup range from ice to boiling water and in this sense the
set-up can be given in the hands of every high school and university physics
student. The measurement requires a standard multi-meter with thermocouple and
voltage probe and gives excellent for education purposes percent accuracy. The
explanation is oriented to university level but due to the simplicity of the
explanation motivated high-school students can follow the explanation
derivation of the used formulas for determination of the absolute zero and the
Boltzmann constant. As a by-product our set-up gives a new method for the
determination of the spectral density of the voltage $e_\mathrm{N}$ and current
noise $i_\mathrm{N}$ of operational amplifiers.
