Haha I’ll be using it for that myself.

I’ll definitely be looking into that

Laura

Thank you sir

I’d love to build an ocean version some day.

Yes, that would be a great improvement. Especially steering in a perpendicular wind/current environment.

Thanks

I replaced these props with some much better toroidal ones and the slight bias to one side virtually disappeared. I abandoned the tilting panel idea because of wind concerns.

Yea it is but it works well. At first I messed around with a couple old fish finders which included a depth sounder. Couldn’t get them to interface with arduino sadly but might be worth investigating further. I know there are some cheap ones that communicate over NMEA, which in theory is possible to read with an arduino.

Concerning the drag/propeller efficiency, have you thought of doing semi-submersible?

Thanks, I’m about to wrap up version 2. Early on, I experimented with using a basic fish finder style depth sounder, I think it was a Hawkeye brand for about $50 used. I took it apart and tried to tap an analog signal off the transducer lines to detect pulses, but never got it to work reliably. Maybe you could find a basic depth sounder with NMEA output that could be readable with Arduino.

@@Clay-Builds I was looking at some sensor called MaxBotix MB7052 for 100 dls getting a reading range of 50cm at 10m, but it is a lot of money to just start testing. My option now is to go for the JSN-SR04T, an ultrasonic sensor module that works just like the HC-SR04 but with a range of up to 4 meters and surely has nothing to do with NMEA but I think it is still possible to record data (minimally good) although surely the boat will have to be quite slow? I'll look into swapping it for a better sensor later. Do you have any direct contact to share with you my progress on the project?

Those sensors are all intended for use in air only. I wouldn’t assume they work underwater. I wouldn’t even bother unless it has an IP rating of 68 or 69. There are some arduino libraries that can pretty easily interface with those, but you’ll at least have to account for the speed of sound difference in water. The sensors themselves may have an enclosed volume of air around the diaphragm that could be problematic underwater, they’re not proper piezoelectric transducers. Firmware certainly won’t account for surface reflections and things like that either. Boat speed will be negligible at this scale. I think you’re better off modifying a fish finder or off the shelf depth sounder to communicate with arduino. I prefer not to be contacted directly.

It can certainly be used as a proximity sensor facing horizontally underwater. The problem with detecting boat bulls at low depths is you might run into issues with the sonar reflecting off the surface. I think for detecting boats you might be better off using above water radar.

@@Clay-Builds Yes I was thinking about this too. I did already experiment with lidar, but getting to many false readings 😞 Was hoping to use the echo sounder for this..... Back to the drawing board I guess...

It’s the blue robotics Ping echo sounder. They just replaced it with the Ping 2, mine is the previous version. bluerobotics.com/store/sonars/echosounders/ping-sonar-r2-rp/

LD1117. Regulating only 5v down to 3v3. Rated for up to 15v and 800mA. The 3v3 stuff only draws around 400mA all together, with that split across two regulators in parallel neither is operating anywhere near its thermal limit. They don’t even get warm.

The steering value “steerval” goes from -100 (hard turn one left) to +100 (hard turn right). This value is determined by the position of the steering stick on the radio transmitter. The “map” function linearly converts this to a value in degrees, because the servo library which controls the ESCs wants to see a value of 0 (no throttle) to 180 (full throttle). “Throtval” is a value between 0-100 representing the position of the throttle stick. Throtval is converted to decimal by the .01 multiplier and applied to the result of the map function. This way the final motor speed is reduced as throttle is reduced. If steerval was 0, with the stick steering straight, “map” would give a value of 180 (full throttle) for both port and starboard. Throttle would reduce both by the same amount. If steerval was 50 for example (halfway to the right) then portval would be 270 and starbval would be 90. This is because the 0,360 is inverted to 360,0. Again, the Throtval may reduce both by the same amount. The code a few lines below makes sure neither exceeds 180, so the final values given to the motors in this case would be 180 port 90 starboard at full throttle. This will make the boat steer to the right.

There’s an SD cars onboard that stores all the data. Every time it takes an echo sounder measurement, the microcontroller writes the current gps location to the SD card along with the depth. They’re stored in CSV format.

@Clay-Builds hi, thanks for this. Is your source code available for the GPS aspect? I would like to record location and depth but I am having some difficulty with the connections and code.

@@udhavmaharaj6179 yes, check out my newer video on this project. There’s a GitHub link in the description with all the code

@@Clay-Builds awesome thank you for that. I'll check it out now.

Hi Clay, I need some help. I managed to hook up the echosounder to the Arduino and I got my SD card linked to the arduino. But I cannot get the distance and confidence to get saved to the SD card.@@Clay-Builds

Not with a simple depth sounder. This is super low resolution approximation, just extrapolating a smooth surface between all the measured points. And it isn’t truly point based, the measured depth is from the return signal of a 20 or 30ish degree cone. Good enough to plot the depth but certainly not imaging anything on the bottom.

@@Clay-Builds ah ok

Blue Robotics

I’m not really interested in selling anything. But this project is all open source if you’re looking to build your own. Newer video has some improvements too.

@@Clay-Buildsthanks man.

ser um simples o projeto, somente sonar e rtk.

Wah wah

I do have an FDM printer, used to make many of the parts in this project. Just haven’t been showing it on camera. I’m getting an SLA printer soon which I’ll use to make better propellors.

Must be a turkish, african or indian person typing this rn. Never heard of the interest in clay printers outside of these countries.

@@xcruell 'clay' is the name of youtuber/youtube Channel name.

@@xcruell 😄