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This horn is SO courteous my car was granted Canadian citizenship yesterday.
Check out Bob's video:
My buddy Howard does this for a living:
Links to the stuff I used (not sponsored):
Sound board:
PA Speaker:
12V to 5V:
Train Horn (not my exact version but this will work well):
Less expensive version:

Courtesy Honk WAV file:
R2D2 WAV file:
0:27- Ceral Killa- Blue Wednesday -
2:18- Berlin- Andrew Applepie-
3:20- Dance- Danijel Zambo-
4:38- Special song written just fo my bad self- Lincoln Hoppe,
5:33- Too Happy to be cool by Notebreak-
Summary: I customized my car horn to play three different sounds. The main sound is the "Courtesy Honk" which is used to get the attention of other drivers in a non-emergency scenario. It's two quick chirps of the horn that is not only friendly sounding, but it's not as loud as a normal car horn.

I make videos like this once a month all year long while supplies last:
TWITTER: #!/MarkRober

Oh here we go yes, that is what i call the courtesy honk. I just push this custom button and it's two super quick chirps of the horn that are not only friendly sounding, but it's intentionally not as loud as a normal horn. So i'm going to show you how and why i did this and in the process i'll explain what this red button does. But first i'm going to pull over 1.3 million people die in car crashes per year, so you really want to be able to communicate with other drivers.

If you want to stay safe, when you think about it, cars only have two built-in ways to communicate with each other. You got your turn signal and your horn and the turn signal is fine, but the problem with the horn is that it's so one-dimensional. It's like, if your only tool is a hammer. It's really good at one thing, but it sucks at everything else, and i don't know about you, but now that pretty much everybody owns a smartphone 99 of time.

I use my horn, i'm not trying to avoid a crash. I'm trying to let the person in front of me know it's time to stop reading that text they just received and that's the issue i'm not upset. I just want to be like hey dude, the light's green, no big deal, and this might come as a surprise because i drive a jetta, but i'm not some hardcore. Angry road rage, tough guy, but even this jetta, which has just about the most emasculating horn possible, sounds angry when you honk it at a light.

And if you try and do a nice quick honk, it doesn't usually register because it bottoms out too quick. So i just push my custom made courtesy honk button and because it's so non-confrontational, this will never happen to me and this works for communicating in a lot of situations, not just at stoplights like if someone is just sort of drifting in your lane, you're not sure. If they see you or not, but you don't want to use your big horn or if you just want to get someone's attention to tell them something. If someone needs to move forward in traffic or in a drive-through, it's nice, because you don't want to seem like a jerk as they can look right at you in their rearview mirror, you can even use it as a way to say thank you, and i kind Of feel like there should be a standard feature on all cars, so you still have your bighorn that you can't miss in the case of an emergency, but there should be a smaller button right over here for the courtesy hunk.

But the good news is that as an engineer, if something isn't exactly how you want it, you just make it exactly how you want it. So i went on amazon and got one of these adafruit soundboards for 27 bucks, where you can upload sound effects via usb with no programming required, and then i got three of these cool horn buttons to trigger the sound effects for seven bucks each. So i start on this side by wiring this to my cigarette lighter for power, and then i use a 12 to 5 volt power inverter to get me to the right voltage for the sound board which is connected to these buttons to trigger the horn, sound effects. I drag and dropped onto there and then coming out of the board.

We have a 3.5 millimeter audio cable that plugs into a 13 amp to make it loud enough, which connects to a 13 pa speaker now that we have all the components. My buddy bob from the youtube channel i like to make stuff came over and we got to work soldering. Actually, i did all the work, while bob just stroked that magnificent beard of his he also made a video about making a custom horn like this. That goes into way more detail, so definitely check his out if you're actually planning on doing this.

This is intentionally more of a temporary setup, but i wanted mine to be a bit more permanent in the dash. So the help of my talented buddy howard, we went to town installing this thing. Now the buttons were in place. We connected them through the dash to the pa speaker, we mounted to the frame under the hood.

We also installed this beast, which is the same type of horn system used on trains and semi trucks. Basically, there's a compressor that fills an air tank to 120 psi which powers the horn, but more on this later, oh and the buttons also light up, which makes them look really cool at night. I also added one more sound effect: that's powered by this button. This is designed to be even one notch nicer than the courtesy honk if you want to be super chill and grab the attention of a pedestrian who isn't even in a car.

So that's my pitch to make our roads more pleasant by increasing the vocabulary of the standard car horn. And now you can do it yourself, which leads me to this final button, which is only to be used in extreme situations like when two teenagers are taking their sweet time to cross the street in front of you, while fidget's spinning, thanks for watching you.

17 thoughts on “Nicest car horn ever- diy”
  1. Avataaar/Circle Created with python_avatars Chelsea Thomas says:

    The vulgar policeman ultimately camp because violet basically choke throughout a naughty linda. lovely, envious october

  2. Avataaar/Circle Created with python_avatars Dayton Pangestu says:

    should make one of those speaker things that they use on police cars like they talk through the thing

  3. Avataaar/Circle Created with python_avatars Ariv Ontowiryo says:

    You are a very creative electronic technician. I like the idea. Love the R2-D2 beep at most! 🙂

  4. Avataaar/Circle Created with python_avatars Josh Govek says:

    Anyone know of a safe site to download or convert sound files?

  5. Avataaar/Circle Created with python_avatars Mick Jager says:

    Headlights are a 3rd way to communicate. You can flash your high beams to let cars and especially 18 wheelers to let them know they have room and you're ok if the move in front of you. I also use them to signal for folks to go at like a 4 way stop. And sometimes use it to tell them a light is green if they are in front of me before I resort to the horn. And of course to tell them to turn their high beams off if they are coming toward me.

  6. Avataaar/Circle Created with python_avatars DIESELPREET SINGH says:

    A better solution would be speed sensitive horn.
    Give two horns with the same sound.
    Below 40km/h only one horn works.
    Above 40km/h both work.
    And then give a switch to disable that feature as well.

  7. Avataaar/Circle Created with python_avatars Maxim P says:

    Is the audio added during the editing process? It sounds too clear for a horn.

  8. Avataaar/Circle Created with python_avatars FromThe3PointLine says:

    I would pay some one to put the sound files on there for me and for to start the soders for me

  9. Avataaar/Circle Created with python_avatars Bome Blue says:

    I want circut control push swicth by one touch to duble trick on . Please.

  10. Avataaar/Circle Created with python_avatars AAA says:

    I need a button that plays the "Bruh" sound effect in those true bruh moments

  11. Avataaar/Circle Created with python_avatars Donnie Catalano says:

    Two weeks ago I got my Godfather melody horn LOL

  12. Avataaar/Circle Created with python_avatars James King says:

    The wise success mostly kick because bonsai rheologically groan to a spotty debt. ceaseless, lonely hose

  13. Avataaar/Circle Created with python_avatars Sunrise Grape Films says:

    Horn #1:hey, please move. Horn #2:MOVE IT!! IMMA HIT YOU! Horn #3:R2-D2 BEEP!

  14. Avataaar/Circle Created with python_avatars Sarah Price Hancock says:

    Seriously need this for my wheelchair–especially for someone without a voice. Could've used it last week in the crosswalk when I nearly got T-boned by a distracted driver.

  15. Avataaar/Circle Created with python_avatars Norbert Kunst says:

    If I made cars I would like to make this into a car but unfortunately I am a kid and I don’t make cars 🙁

  16. Avataaar/Circle Created with python_avatars DanielBigCat says:

    Standard car horns is not respectful just like people screaming to people, but thanks to you Mark so every car manufactures can invent respectful car horn.

  17. Avataaar/Circle Created with python_avatars Vishal Katwe says:

    "Blinkers and horn are the only ways cars can communicate"
    Headlight flash: :'(

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