#627

Episode 627
A simple 433MHz transmitter with CW keying. Data input pin just turns the power on and off
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[@ErikKaashoek]

The latest tinySA FW has a mirror masking option for high mode. This helps to reduce the artifacts you saw at 10MHz span.

[@benotsilent6703]

Your detailed explanations of the TinySA have been very useful.

[@HelmutTschemernjak]

Very cool video, thank you for explaining all the analyzer stuff. PS: a PayPal link for promoting your Lab would be great for many viewers.

[@rongarza9488]

Thank you for posting this video. Would you do one for the receiver? I'm curious about the variable resistor(?) on the receiver.

[@IMSAIGuy]

kzbin.info/www/bejne/goi4ooaKgNaGsM0

[@Jbrimbelibap]

To see that signal you could also use a 9€ RTL-SDR dongle, the TV tuner one

[@oed27]

Can this oscillator be used in conjunction with an SBL-1 mixer to build a tracking generator for the Tinysa?

[@IMSAIGuy]

sure

[@soconnoriv]

Does the data output from the receiver provide enough current to operate a relay?

[@James_Bowie]

Seems there are two versions of that Tx nowadays: with either two copper coils or (like yours) just one. The schematic clearly shows L1 in series with Vcc, so where has that gone?

[@kamleshchavan7451]

Sir can u please explain the circuit diagram ( schematics ) of the 433 MHz RF transmitter and receiver module and function of the components used in the module

[@noggin73]

I bought some RF power sockets and was able to control them with one of these. There is a sniffer for the receiver in the Arduino library.

[@MikeFikes]

It is possible to move HP SA menus a little from the edge of the CRT by going into CAL > More > CRT HORIZ POSITION. (For some reason, if the SA is set for NTSC, everything shifts to the right a bit too much, pushing some of the menu items slightly off the screen.)

[@IMSAIGuy]

Yes I know how to do that but every time I power off it forgets. I've tried many menu setting to try and save it but it just forgets. I think the firmware upgrade fixes this. maybe in the future I'll try again

[@MikeFikes]

@@IMSAIGuy Ahh interesting. FWIW, mine persists that CAL setting across a reboot. Its firmware is rev 980615 (it is a 8594E if that matters).

[@IMSAIGuy]

@@MikeFikes you have the very latest firmware revision. Mine is several before yours.

[@Ivan7enych]

This transmitter worked very unstable on one of my projects. On power on it starts transmitting somewhere in 300-500MHz (frequency based on LC feedback loop), then, maybe, if I don't put anything near antenna, it locks on 433MHz. On every transmitted pulse this unstability repeated. On ali there's another quartz based transmitter, without this problem.

[@ganesai]

I wonder the water fall mode in tiny SA might show you the on off keying as well

[@IMSAIGuy]

don't think it is fast enough, but maybe

[@KennTaylor]

would it be possible to send an audio signal between these two, like for sending a signal from a guitar, even if it needs a little preamp on the same 5v or something, but yah, really hoping it will work

[@colincolin30]

Now, how can I use these 433mhz devices to let me know when there is a letter in the letterbox???

[@IMSAIGuy]

put a switch on the box. the switch is normally open. when the mailperson opens the box the device transmits.

[@HelmutTschemernjak]

I recommend to use turnkey LoRa boards, this overcomes distance problems and works reliable for 10 years on battery. Check out my Turtle boards at www.radioshuttle.de

[@Aron102]

Very interesting 👍

[@simonstergaard]

i know i have a box of them that i have had for atleast 5 years.... better find them now.

[@acestudioscouk-Ace-G0ACE]

What you say is very interesting but do you realise how annoying it is to watch when you keep jerking the items around? The viewer never gets a chance to see any detail and It actually made me feel motion sick. Please keep up the interesting work but leave the subjects static, so viewers are able to have a close look at them. I've liked and subscribed. As a radio ham I have to ask, is there a way to put a tone on this and use it for sending morse code please?

[@bobkozlarekwa2sqq59]

When the actual video ends it turns to black I think you need to edit this and get rid of the black

[@IMSAIGuy]

crud. I'll edit that

[@JohnSmith-bb2np]

I think you need to re-upload the video since most of it's run time is black nothing. Your 45 minute video ends at 18 minutes.

[@IMSAIGuy]

working on it

[@Bazzawombat]

right on the input of our club repeater, 438.975 mhz, these things should be banned

[@jimsouthall1085]

Quit fiddling with the devices. Very distracting and counter productive. Please!

[@SHADOW-bg4mm]

Nice, this is helping me build my own transmitter, receiver module from scratch, so i dont have to buy that already made module, of course i have to look at more vids

[@udeolisachukwudalu1309]

Please I am also learning to build from scratch, can we connect ?

[@RobB_VK6ES]

A whole bunch of reasons not to use the miniSA not least of which it is it is a steaming pile. Yeah I'm not as forgiving or generous.

[@herbertsusmann986]

I agree. Not worth even the sub-$100 price if you ask me. Keep an eye on eBay and you will find good used SA for sale for a reasonable price.

[@jdmccorful]

Good stuff, keep it coming Mr. Peabody.