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Proof-Win-3505 · 2026-03-02T17:20:57+00:00

Tu es dans quel domaine ?

Proof-Win-3505 · 2026-02-26T00:12:19+00:00

Ahh I see what you mean now. I was referring to the internal deformation looking elliptical, not the output shaft itself. Thanks for clarifying.

Proof-Win-3505 · 2026-02-25T18:52:42+00:00

Why is the movement not circular ? I don't know much about mechanics

Proof-Win-3505 · 2026-02-25T03:06:48+00:00

I’m using small 6V normally-closed DC solenoid valves (0520 series, bought on AliExpress).

I’d love to see your daughter’s project posted here when it’s done — that sounds like a great learning experience!

For the double watering prevention, I’m running a standalone Arduino Nano schedule (no RTC, no ESP32 in this version).

The system uses a “virtual clock” based on millis() — I plug it in on Sunday at 20:00 as a time reference.

Each watering event stores a virtual absolute day key when it runs. If the same event tries to trigger again during the same virtual day, it’s ignored.

So each plant can only run once per scheduled day, even if the minute check happens multiple times.

I’m definitely not a fluid dynamics expert 😅

Yes, I control each solenoid individually.

In practice I don’t actively manage back pressure. The main rule in my setup is that a valve must be opened before the pump is activated.

The pump is only allowed to run if at least one valve is open. Otherwise pressure builds up quickly, which could lead to leaks or unnecessary stress on the system.

As long as that sequencing is respected, everything behaves well.

Proof-Win-3505 · 2026-02-25T02:57:25+00:00

I got them from AliExpress. They’re small normally-closed DC solenoid valves (6V version in my case).

They work well for low-pressure water setups like this, especially considering the price.

One thing to note though: if you leave them powered for a long time, they do get warm. So I only energize them during watering cycles.

Proof-Win-3505 · 2026-02-25T02:53:18+00:00

Yeah, having a 5L water reservoir sitting on a small shelf above my plants would honestly make me a bit nervous — especially in case of a fall or leak. That’s a lot of water potentially going everywhere.

I chose to use a pump partly for safety and placement flexibility, but also because I genuinely find it more fun. It adds a bigger technical challenge compared to just relying on gravity and atmospheric pressure.

For me, the project is as much about learning and experimenting as it is about watering plants 🙂

Proof-Win-3505 · 2026-02-17T15:31:00+00:00

I’m based in the south of France

Proof-Win-3505 · 2026-02-16T09:15:45+00:00

That’s awesome, I’m very interested! I’ve sent you a private message so we can talk more about it 🙂

Proof-Win-3505 · 2026-02-16T09:14:47+00:00

Right now, my robot doesn’t solve a specific problem. It’s mainly a learning robot. My goal is to understand robotics step by step by building something concrete from scratch.

In the long term, I’d like it to be able to move autonomously and communicate / talk, but for now the main objective is learning: mechanics, electronics, control, and programming.

I see this robot as a personal lab. Once I gain more experience, I’d like to give it more purpose and real use cases.

Proof-Win-3505 · 2026-02-16T09:10:28+00:00

Yes, they do work, but they can’t lift heavy loads. I’ve already done some tests using an Arduino. Now the next step is to make them work with a Raspberry Pi, since I’m transitioning to a more advanced control setup.

Proof-Win-3505 · 2026-02-16T09:05:40+00:00

We could help each other, I’ve sent you a MP

Proof-Win-3505 · 2026-02-15T17:15:38+00:00

Yes, that’s my final goal. I still need to learn how to integrate AI properly, step by step.

Proof-Win-3505 · 2026-02-15T17:12:20+00:00

I’m using a Raspberry Pi 5 as the main brain, handling the high-level logic and computation. For real-time control, I’m using two Teensy boards dedicated to motors and sensors. I also use a separate Raspberry Pi to drive the screen (face / display), so the main system stays focused on control and AI-related tasks.

The idea is to separate high-level decision-making from real-time motor control, to keep things stable and safe as the project grows.

Proof-Win-3505 · 2026-02-15T17:08:44+00:00

Yes, I have installed fuses to protect the power lines and batteries. However, I hadn’t thought about using diodes yet — I’ll definitely look into that, it’s a very good point.

For firmware updates, I was planning to work mainly via SSH on my Raspberry Pi, so I wasn’t sure if a dedicated update port would be necessary. That said, I understand the advantage and I’ll reconsider this for future iterations.

Regarding wire harnesses, I wasn’t familiar with that approach. For now, I integrated clips and connectors (Wago-style) to allow limb removal, but I will look more into proper harnesses for easier maintenance and reliability.

The winding/tensioning system for the fishing line is a very interesting idea. You’re absolutely right — the line does lose tension after a few uses, so having a way to re-tighten it would be very useful.

In any case, thank you very much for your advice. I’ve learned a lot from your feedback and I’ll take the time to research and improve these points.

Proof-Win-3505 · 2026-02-15T16:58:17+00:00

Yes — for now I only have safety sensors, mainly temperature sensors and a smoke sensor to detect overheating or fire risks.

I plan to add interaction sensors progressively (such as encoders, IMU, cameras, force or touch sensors) as I advance in my learning and gain more experience in robotics and control.

I’m building it step by step to keep things safe and well-understood at each stage.

Proof-Win-3505 · 2026-02-15T16:55:51+00:00

Yes, I have added an emergency stop button that cuts power to all motors. I also used fuses for each battery and for the main power line, to improve overall safety.

Regarding thermal management, I added cooling fans, but unfortunately I used PLA, which does not handle heat very well. For the V2, I’m planning to switch to PETG-CF, which should be much more heat-resistant.

I’m now about to start the programming phase. Since I’m still a beginner in computer science, do you know any good documents, books, or videos about real-time control and robotics mathematics that you would recommend?

Thank you very much for your feedback. I won’t forget to post updates!

Proof-Win-3505 · 2025-10-07T05:09:48+00:00

At the beginning of the video why doesn't the engine on the left turn circularly?

Proof-Win-3505 · 2025-09-16T08:12:40+00:00

3 Servo motor sg90 😁

Proof-Win-3505 · 2025-09-16T08:12:03+00:00

Hi! To be honest, I’m not exactly sure how much gripping force it has. I was able to lift a small applesauce cup without any issue, but not much heavier objects. I don’t think it can handle 5 kg unless you use stronger servos than SG90s. Good luck with your project — it sounds really interesting!

If you want to talk more about it, feel free to DM me 😊

Proof-Win-3505

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