Cloning radio-control button - with schematic
bigclivedotcom 11:05
41,832 views · 2,921 likes Watch on YouTube ↗
A neat little button that can be used to clone an existing fixed-code RF remote control of the same frequency. This one is for 433MHz.
Note that it cannot be used to clone vehicle fobs, as they usually use a code that changes continuously for security.
I missed the crystal/resonator from the schematic. It goes between the RF transmitter chip and the zero volt power rail. (ground)
The receiver in the video can actually be used with several different remotes, each with their own code. But the purpose of this video is to demonstrate cloning an existing remote, so the receiver does not need to be accessed.
When I first got this I thought I'd been sent a plain fixed code unit, as there were no instructions for programming it. I did the usual long press, multi-press things and then stumbled on the proper programming method accidentally. Here's how it's done.
Click the button four times, holding it on continuously on the fourth click.
After a delay it will start flashing and then go static and can be released at that point.
Hold the original remote to be copied next to the unit and press both their buttons at once.
The button's LED will blink twice, and then it will flicker and go static when it has received a valid code.
The button will now replay that code when pressed.
A couple of interesting things in this circuit. Firstly the use of a microcontroller that seems to be a PIC clone. And secondly the RF receiving circuitry, which is very minimal, but has a bizarre two transistor circuit just to switch it on. Possibly from a universal schematic for using a wider range of supply voltages.
I bought this button from an AliExpress seller.
Try the keywords 433MHZ cloning button.
Note that RF remote control frequency standards differ between countries, so you should get a matching set for a locally allowed frequency.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty.
#ElectronicsCreators
Note that it cannot be used to clone vehicle fobs, as they usually use a code that changes continuously for security.
I missed the crystal/resonator from the schematic. It goes between the RF transmitter chip and the zero volt power rail. (ground)
The receiver in the video can actually be used with several different remotes, each with their own code. But the purpose of this video is to demonstrate cloning an existing remote, so the receiver does not need to be accessed.
When I first got this I thought I'd been sent a plain fixed code unit, as there were no instructions for programming it. I did the usual long press, multi-press things and then stumbled on the proper programming method accidentally. Here's how it's done.
Click the button four times, holding it on continuously on the fourth click.
After a delay it will start flashing and then go static and can be released at that point.
Hold the original remote to be copied next to the unit and press both their buttons at once.
The button's LED will blink twice, and then it will flicker and go static when it has received a valid code.
The button will now replay that code when pressed.
A couple of interesting things in this circuit. Firstly the use of a microcontroller that seems to be a PIC clone. And secondly the RF receiving circuitry, which is very minimal, but has a bizarre two transistor circuit just to switch it on. Possibly from a universal schematic for using a wider range of supply voltages.
I bought this button from an AliExpress seller.
Try the keywords 433MHZ cloning button.
Note that RF remote control frequency standards differ between countries, so you should get a matching set for a locally allowed frequency.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty.
#ElectronicsCreators
Category (YouTube): Science & Technology
Playback is via YouTube's official embedded player. Data from YouTube; Exumo is not affiliated with YouTube.