Hi Rob,
That looks impressive. The one I made has a camera on board so I can look 
under the furniture to see if there is dust. The speed is therefore much 
lower and I could do everything with one 16F648a. I did use a ready-made 
motor driver set.
This is of course much more professional. Very good.
greetings Hans

Op zaterdag 5 april 2025 om 19:12:36 UTC+2 schreef Rob CJ:

> Hi Vasile,
>
> I remember that car. I had it as a toy. It worked completely mechanical. 
> When it reached the end of the table it turned.
>
> Could also buld it in this car 🙂.
>
> Kind regards,
>
> Rob
>
> ------------------------------
> *Van:* [email protected] <[email protected]> namens vsurducan 
> <[email protected]>
> *Verzonden:* zaterdag 5 april 2025 18:34
> *Aan:* [email protected] <[email protected]>
> *Onderwerp:* Re: [jallib] hcsr04 3x 
>  
> 👍👍
> Hi Rob, that's reminds me a  car which does not fall from the table where 
> ever it goes. It had no electronics whatsoever except a bistable relay and 
> two front and two rear contacts. Much more elaborated is yours... Great.
>
> On Sat, Apr 5, 2025 at 6:30 PM [email protected] <[email protected]> 
> wrote:
>
> Hi Hans,
>
> I made a self driving Robot Wagon, just for fun, using three HC-SR04 
> modules. I am using the JAL HC-SR04 library for measuring the distance but 
> since the library is made to support only one module, I am using an Analog 
> Multiplexer IC (74HC4052) to multiplex the three sensors.
>
> For a video, see: https://youtu.be/kwYxd5GjtCw
>
> I also posted the project on Instructables: 
> https://www.instructables.com/Self-Driving-Robot-Wagon/
>
> Kind regard,
>
> Rob
>
>
> Op zondag 9 februari 2025 om 16:35:23 UTC schreef [email protected]:
>
> Hi Hans,
>
> I did not make something like this but if you use the JAL library for the 
> HC-SR04 you need to mutiplex the output of the device and connect the 
> multiplexed signal to the interrupt pin of the PIC.
>
> Next to that you need also need to multiplex the trigger signal that goes 
> to each HC-SR04 module.
>
> Kind regards,
>
> Rob
>
>
>
>
> ------------------------------
> *Van:* [email protected] <[email protected]> namens Hans van 
> Veldhuizen <[email protected]>
> *Verzonden:* zondag 9 februari 2025 17:04
> *Aan:* jallib <[email protected]>
> *Onderwerp:* [jallib] hcsr04 3x 
>  
> Hello, I have tried the hc sr04 and now have something in hand that needs 
> three such sensors at the same time. Has anyone made something like this 
> before?
> greetings
> Hans 
>
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