Remote control wall switches

Good stuff! Many thanks for including the RF part!

Hagen

Or you might be sad enough to have memorized all the 2^N up to 20 or more ;)

Mike Page

Clive, I have found an interesting LED video that should interest you https://www.youtube.com/watch?v=yoTALRhAqWc

Its called a Taijitu or Yin-Yang symbol! Great video as always

Lee Trott

If you envision a mesh network, could one setup a ‘repeater’ with extra devices if the device will accept all packets and relays them❓

Cerity

Have you considered flashing one with Tasmota firmware to try out? No need for that remote Chinese server.

Big Clive

If matched to the wavelength it could provide an advantage.

Big Clive

How are you doing? Your word arrangement is getting back to normal.

Big Clive

I wonder how far you could use this for simple on/off control using directional antenna attached to that top corner pad?

Jon Knight

I have been using Sonoff switches and remote units for the last couple of years, they have a good range and combine RF and IOT options, the R3 series even have headers for loading your own code. The downside is to use the IOT features you have to register an account and use their app and server which is located in CN, apart from the data security concern you lose function if you lose internet or Wi-Fi, but that's not that often. It has worked well for me so far.

The Tinkering Shed

I find 3 and 4 ways get to complicated 🙄

Simon Deards VK3FSPD

Amen to that! I'm not averse to smart systems being connected to the internet per-se, provided security is adequate (which it frequently isn't). What I', not so enamoured by are smart systems which are entirely dependent on some Chinese (or American) server and a proprietary phone app. Apart from the obvious security implications, with many of these control or monitoring systems. if your internet goes down, or the vendor's server goes down, or gets hacked, or they go out of business, it all turns into ornaments. Having integration with Google or Apple for voice control is lovely, except many of these systems still route everything via their own servers en route to Google or Apple..

Gordo

The big disadvantage of 433 devices is the lack of 2-way communication. When the receiver misses a signal, which happens regularly, the switch doesn't know and cannot resend it. Zigbee, Z-wave, wifi or wired (knx) devices do have 2-way communication and are preferred when you expect reliability.

Bas

Nice Clive, this will make an interesting video for next Thursday's amateur radio club Zoom meeting, You're right about the 20 bits giving a million differs - easy way to remember it is 10 bits is roughly a thousand and every additional bit doubles it. If you add the bits, you multiple the number of combinations so 20 bits is a million, 30 bits is a billion, 31 bits 2 billion and 32 bits gives 4 billion, the physical address-space of a 32-bit computer

Gordo

F yeah Shitty morning This will help

Michael Thompson

FM F#%%# Magic

Very cool switches. I like those “smart” switches that aren’t connected to the internet. There’s a few reasons for that capacitor across the RF transistor. Sometimes it can be used for conditional stability, to silence higher order harmonics, or to slow or speed up (depending on the value of course) the rise or fall time or pulse width of pulsed transmissions.

Rf is black magic