Not Understanding Circuit ,Help!

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NishantSood

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I want know what the different components do in this circuit and why they are there:

**broken link removed**
 

Here is a hint. The resistor at the left is a thermistor whose resistance changes as a function of temperature. Thus this circuit is an audio oscillator whose output frequency varies with temperature. The potentiometer across the thermistor sets the oscillation frequency at a specific temperature.
 

Yup, trim pot is the same as trimmer potentiometer. The NPN PNP pair of transistors are acting as a simple audio amplifier for this circuit, where the base current for T1 is varied depending on the thermistor and potentiometer.
 

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