My son's toy car exhaust sound :)

[tamer4100]

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.

 

[Bluejets]

Google.
For example here........ https://www.youtube.com/@TheDIYGuy999/videos

or just buy one from an rc store.

 

[bidrohini]

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]

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]

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.

 

[Bluejets]

but I want to adjust the sound according to the pedal.

Well, that could mean sound level, but I took it to be accelerator frequency/speed.
Silly me.
Perhap Op should be more specific.

 

[kellys_eye]

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!