photoresistor generator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Radio amateur designer
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The simplest relaxation generator can be assembled from three elements: a variable resistor, a photoresistor and a neon light bulb. Feedback in such a generator is optical between a photoresistor and a neon light bulb. The ignition of the latter leads to a decrease in the resistance of the photoresistor. The voltage drop across it decreases to a value less than the voltage of the light bulb burning - it goes out. The subsequent increase in the resistance of the photoresistor increases the voltage drop across it to a value greater than the ignition voltage of the neon lamp - it lights up, etc.
The oscillation frequency of such a generator varies over a wide range by changing the voltage of the power source and the resistance value of the resistors R1 + R2. To ensure maximum feedback, the light bulb and photoresistor are placed in a translucent case.
The performance of such a generator was tested on domestic elements: a neon lamp MN-6 and a photoresistor FS-K1.
Literature
- Popular Electronics, 1965, Vol. 23, No. 2.
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