Diesel noise generator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Calls and audio simulators
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Some noises can be obtained with electronic devices. This diesel engine noise simulator also belongs to them. A hissing bubbling noise occurs during the operation of the transistor T1 when its emitter junction is reverse biased.
It is modulated by the trapezoidal pulse generator on the IC1 chip, which is designed to provide slow processes.
(click to enlarge)
The pulse repetition frequency is changed using a variable resistor.
LM 741 can be replaced with K140UD16, transistor BC308 with KT3107, BD237 with KT817G
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