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My son's toy car exhaust sound :)

tamer4100

Mar 4, 2023
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Mar 4, 2023
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hello everyone. My son has a toy car. pedal works with potentiometer. I want to make exhaust sound. The amp and speaker part is very simple, but I want to adjust the sound according to the pedal. Which microcontroller should I use and how should I go about it. thanks.
 

bidrohini

Feb 1, 2023
51
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Feb 1, 2023
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I was googling for a car exhaust sound IC. But could not find any. Another option is to use and arduino+an SD card with card reader+a speaker. But I think this solution is too expensive.
 

Bluejets

Oct 5, 2014
6,199
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Oct 5, 2014
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Easiest and possibly cheapest is, forget the throttle and use a simple $20 bluetooth speaker coupled to a phone or whatever.
Seen some rather small units used in model trains and output is surprisingly good for such a small device.
 

Martaine2005

May 12, 2015
4,539
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May 12, 2015
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Change the amps volume pot and use a sliding pot. With a bit of engineering, you can get the slide pot to work in conjunction with the accelerator pedal.
 

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kellys_eye

Jun 25, 2010
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The only way to get a realistic effect is to use a VCF (voltage controlled filter) to replicate the way an engine sounds under load/acceleration/coasting etc.

Digital reproduction of the actual engine noise is fairly easy but the realism takes time/trouble to achieve.

Fun fact - around 30 years ago I started developing just such a system. The idea at the time was to make a sound source that was linked to a cars accelerator and could be used to select any motorised sound you wanted (from a menu). Speakers under the car could make your car sound like a steam train pulling out of a station or rev like an F1 car whilst doing 20mph in a city centre.

I got the individual system modules working (digital reproduction) and VCF/amplifier but never managed to link all three processes together to work realistically. Work, time and money finished that project off. Might be time to revive it!
 
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