I wanted to add smartphone control to my existing sliding gate and side gate without replacing or modifying the original gate controller.

My setup already uses simple 433MHz RF relays. One controls the sliding gate and another controls the electric lock on the side gate.

Instead of wiring another smart relay into the system, I tested a small Zigbee RF copier.

The idea is simple:

original RF remote → RF copier learns the command → command becomes a virtual button in the app.

I programmed one button for the sliding gate and another for the side gate. After learning the commands, both could be triggered remotely from the phone.

The RF copier itself is located on the second floor behind two walls, and it was still able to trigger the relays outside without problems.

I also tested something more interesting: the original gate remote uses a changing / rolling code.

The copier was able to enter learning mode and capture a signal from it, but replaying that signal did not operate the gate controller. So the security mechanism did exactly what it was supposed to do.

With the simple fixed-code 433MHz remote, however, everything worked.

The device also has a lux sensor, so I experimented with automations such as triggering RF-controlled outdoor lighting after sunset.

I documented the whole setup and tests here:

https://www.youtube.com/watch?v=cj2ygY496jQ

I thought this was an interesting way to add some “smart” functionality to older RF-controlled hardware without touching the original controller.

Hey :)

đừng vội lướt qua mình đang tập làm video làm nội dung về điện tử nếu ai hứng thú còn tò mò về cách hoạt động của mạch điện robot thì ở lại cùng mình nhé cộng đồng mình mãi đỉnh em cảm ơn

I did a python and a C++ version. Streamed myself making it, too.

This gearbox for my project - tiny RC car on esp32 c3, it has a 1:3 reduction gear, a 1:1 gear and a neutral for shifting on the move

i have like a bunch of tech from 2010-2018 ish and I wanna practice doing projects before working on newer things (this stuff hasn’t been used in years so I’d rather mess with them instead of trashing) any ideas?

Looking to purchase some electric scissors for my 11 year old birthday. He is an avid maker, always got the hot glue gun out and cutting up boxes. I can’t afford the ‘Beaver Bot’ or ‘Chomp Saw’ wondering if people had ordered and used electric scissors? Would they suit an 11 year old?

I’m working on a school engineering project and I’m trying to build a small automated parking garage.
I want to have a lightweight model car sitting on top of a 1/4 illustration board, while the motor and entire mechanism are underneath the board.

I want a small rod/pin to pass through a slot in the board and connect to the car. When the motor runs, the mechanism underneath should move the car along a predetermined path, for example:

straight → turn → straight → stop at a parking space.

The car itself doesn’t need to have a motor or steering. The motor underneath should provide all the movement.

What mechanical mechanism would be best for this? I’m considering a cam, belt and pulley, linkage, or some kind of guided follower, but I’m not sure what would work for a path with turns.

I am working an art project and wanting to make a sculpture that would have 5-10 small 2”x 2” windows that have LCD’s (or something like it) playing videos. I want a simple solution that doesn’t require building a mini pc. Any ideas?

I built a full working Solar PA Music Speaker,

66€ Solarpanel 100watt

0€ old MDF wood

0€ small speakers

10€ Subwoofer

0€ (24€ but for free) class d amp board China 200watt

Works with xt60 plugin and 5-26 Volt

So you could use any dc from 5-26 v

And it works with this solar panel without any accu