433MHz RF wireless modules from eBay (transmitter and receiver)

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DiodeGoneWild

DiodeGoneWild

Күн бұрын

Пікірлер: 114
@Anvilshock
@Anvilshock Жыл бұрын
May KZbin never run out of valuable educational channels like this one!
@wolfrobben6914
@wolfrobben6914 Жыл бұрын
I am using the same module on my thermometer. Now, I finally learned how it works and that I am supposed to send data in reverse order.
@mojojomo6750
@mojojomo6750 Жыл бұрын
"When DATA is spelled ATAD, you know you are getting the best" - gave me a chuckle! 😁
@magnusterminus4728
@magnusterminus4728 Жыл бұрын
if you have your project ready (transmitter sending data and receiver actually receiving the data and added a 17.3cm copper wire antenna to both) you can connect a small temporary speaker to the output of tye receiver. than move the receiver away from the transmitter for about 30 meters and fine tune the coil of the receiver with a plastic screw driver. you will hear the sound increase and decrease if you slowly rotate the coil, a louder setting will significantly extend the range. than remove the speaker from the receiver and the two are adjusted optimally. this worked perfectly for me!
@SeanBZA
@SeanBZA Жыл бұрын
Transmitter to improve the fall time you can put a 20k resistor from Vcc to the collector of the switching transistor, to provide a discharge path for the oscillator side. Increases power draw a little, but should reduce that switch off time. input can also be improved by a ceramic capacitor across the supply pins, any value from 10n up chip ceramic, to make the impedance of the supply lower at RF.
@RicoElectrico
@RicoElectrico Жыл бұрын
3:00 dBm is not decibel meters, but a shorthand for dBmW (dB relative to 1 mW)
@good_king2024
@good_king2024 Жыл бұрын
I'm addicted to your videos. I like good amount of depth your explanations has & also the way you speak is very rhythmic(singing) :)
@Debraj1978
@Debraj1978 Жыл бұрын
As mentioned on this video, these modules have been same for the past 10 years or more. Its pure analog output, you make your own protocol to have effective communication. You have to do your own preamble (send like 10101010 sequence), form packet and add CRC. This band is crowded and combined with the automatic gain control of the receiver, the output will be very noisy. But even with all these checks and corrections, there is no way for transmitter to know if the receiver has really received the data. So this module is not good for digital data communication.
@airmann90
@airmann90 Жыл бұрын
dBm I think is decibel- mw into a 50 ohm load? 0dBm is 1mw into a 50ohm impedance (or 600 ohm for video)
@airmann90
@airmann90 Жыл бұрын
100 fW is -100dbm haha wow
@jacekk_
@jacekk_ Жыл бұрын
Yes you're right - dBm is decibel milliwatt - logarithmic power in reference to 1 mW, P[dBm] = 10log(P[mW]/1mW]) And also what you mentioned is so called normal generator - 600 ohm resistance, on which dissipated power is 1mW = 0dBm, voltage is 0,775V = 0dBu and the current is 1,29mA=0dBi This is the international generator model used for the measurements
@pasixty6510
@pasixty6510 Жыл бұрын
One advice on the Transmitter module: Don‘t use it without a proper low pass filter to cut off frequencies above 433 MHz. Otherwise you produce a lot of out of band emissions.
@ProdigalPorcupine
@ProdigalPorcupine Жыл бұрын
Negligible at that power level. There's millions of car central locking and alarm fobs with the same circuit which would have had to have passed certification without LPFs.
@IanSlothieRolfe
@IanSlothieRolfe Жыл бұрын
I was experimenting with these modules last year because I wanted to transmit on/off commands to the thermostatic switch plug that controls the fan heater in my room - the supplied thermostat was innacurate and ate batteries so quickly. I bought some reciever/transmitter pairs off ebay and the receivers were so noisy they were unusable. I bought another from Amazon that was more expensive and was surprised that I could recieve the signals from the tyre sensors of cars driving past on the road 20-25m away! So performance is very variable, and its not always possible to know which receivers are best.
@jimmybrad156
@jimmybrad156 Жыл бұрын
Find a solution? NRF24L01?
@IanSlothieRolfe
@IanSlothieRolfe Жыл бұрын
@@jimmybrad156 not really, it has to be 433Mhz because the thing I'm switching expects that. I did experiment with a SDR dongle but its transmit capability was limited and then my squirrel brain got distracted and I never got back to playing with it again!
@omsingharjit
@omsingharjit Жыл бұрын
I like that , you are also covering the RF Electronic.
@planker
@planker Жыл бұрын
Excellent. I'm still exploring these modules after two years. They work!
@zvpunry1971
@zvpunry1971 Жыл бұрын
Yes, they are regenerative receivers and they oscillate almost always and also interfere with nearby receivers of the same type. That is why you sometimes have problems with cheap remote controlled outlets when you plug more then one into the same power strip or nearby outlets. This interference results in a severely reduced range.
@omsingharjit
@omsingharjit Жыл бұрын
So this same Interference topology used in cheap wireless Door bell's receiver circuits Right ?
@zazugee
@zazugee Жыл бұрын
yet, mostly remote controls, they are supposed to not run for long and thus crowd and cause interference
@johnwelbourn3811
@johnwelbourn3811 Жыл бұрын
Yes please DGW, more information regarding the wireless thermometer circuit would be good. I'm thinking of building one.
@Lucius4992
@Lucius4992 Жыл бұрын
I have had 4 pairs of those sitting over here and didn't have a chance to toy with them yet. I appreciate the info about the poor sensitivity and the good receiver. I'm looking forward to more videos about how to get the best out of them!
@omniyambot9876
@omniyambot9876 Жыл бұрын
This is what I use in my STM32 Simple but complicated for me piece of tech. Never knew 'you are going to make a video about it.....
@Alchemetica
@Alchemetica Жыл бұрын
Interesting video, I have never looked at transmitters & receivers in any detail.
@iamdarkyoshi
@iamdarkyoshi Жыл бұрын
Hey DGW, if you're open to video ideas, I'd be interested in learning about how to design circuitry to drive recycled VFDs from scrap VCRs, microwaves, ect using a microcontroller You've covered VFDs from clocks a few times and they've been really informative videos, a video dedicated to running them would be really cool
@DiodeGoneWild
@DiodeGoneWild Жыл бұрын
I might make a video about VFD displays one day ;). And also my diy VFD clock might give you an idea: danyk.cz/avr_vfd_en.html
@dutt_arka
@dutt_arka Жыл бұрын
​@@DiodeGoneWild You are a genius,Danyk.
@bonesreds
@bonesreds Жыл бұрын
Man I love your voice, I wish you were my physics teacher
@felenov
@felenov Жыл бұрын
Those things are very fun to toy with if you enjoy making your own RX TX logic. Also they do put out quite a few strong harmonics, will catch you by surprise if you do a lot of RF stuff
@LunaWuna
@LunaWuna Жыл бұрын
I would love to see what the transmitter looks like on an SDR. you can get very pretty cheap SDRs such as the rtl sdr for less than 30 dollars
@pierpaoloscian5926
@pierpaoloscian5926 Жыл бұрын
What Is a decibel Meter? Questionable unit :D dBm means decibel milliwatt!
@DiodeGoneWild
@DiodeGoneWild Жыл бұрын
yes, my mistake, I put a correction into the description which nobody ever reads ;). I didn't want to delete and reupload the whole video because of this...
@pierpaoloscian5926
@pierpaoloscian5926 Жыл бұрын
@@DiodeGoneWild description is like a manual.. :)
@erikziak1249
@erikziak1249 Жыл бұрын
This comment would be too long if I were to list all the things this video covers. Better keep it simple: Amazing video! Thanks for making it and sharing with the world.
@omsingharjit
@omsingharjit Жыл бұрын
Please also Take A Look on the Circuit of cheap Wireless Door bell , it's very sensitive stable with long ranges , I had read somewhere that , its receiver Topology is Just a Low power Transmitter don't know how exactly a transmitter on the receiver circuit are able to recieve the transmitted signals ? It perhaps works on Resonance Wave Interference !!??
@beatrute2677
@beatrute2677 Жыл бұрын
Nice explanation man, thanks alot
@bazzaar1869
@bazzaar1869 Жыл бұрын
I think the way the reciever works is that the self quencing super regen receiver will sweep a range of frequecies as that 400kHz ramp occurs. If there then is a signal at the antenna you will get an LF component presented to the op amp stage becuase the sweep frequency and the received signal will mix producing a difference signal. So you need to insure that receiver will sweep through the frequency of the transmitter.
@PrajjalakChattopadhyay
@PrajjalakChattopadhyay Жыл бұрын
ATAD! The best I have seen so far.
@jg6780
@jg6780 Жыл бұрын
The main virtue of superregenerative receivers is their very small power draw. Even today any other receiver would draw more power from the source. Back in the 90's it was common to make car radio-alarms in similar way, though I have never seen such oscillator. Do you know how it works? The resonator is probably two transmision lines with common ground, on high dielectric constant material like BaTiO3. It would be interesting to experiment with ferroelectric capacitors as a dielectric resonator. The DC voltage on the output of detector should be I think proportional to logarithm of the RF voltage, it might be interesting to place there a multimeter.
@sebastian19745
@sebastian19745 Жыл бұрын
I wish I could had them back in 90s. I used to play via serial cable doom with my neighbour and a long cable (even a null-modem one) was not feasible, so I took a pair of cheap walkie-talkie that covered the 100m distance (in straight line, direct view) in audio and made a half-duplex transmision line via RF 27MHz. The boards were similar dodgy but made with trough-hole components only so easy to work with. Long story short, after few days of tinkering and adjusting, we managed to play Doom (at quite low transmission rate).
@weinihao3632
@weinihao3632 Жыл бұрын
8:29 "40 BUG 4__0": What's the matter with the date string on your oscilloscope? Did you set the output format to decibelmeters or is the battery in your DS1742 timekeeper empty? Changing the battery (requires to dremel open the DS1742) could make for a good episode (alternatively you can build an adapter to fit a DS1744).
@Biokemist-o3k
@Biokemist-o3k 11 ай бұрын
Super cool!! I have just started experimenting and building wireless networks with these things....
@pierpa_76pierpaolo
@pierpa_76pierpaolo 3 ай бұрын
I want to experiment with these modules. With the tx I want to get a surface microphone (without applying the mic capsule), for wall, metal, plastic, wood, etc. I am interested in detecting night noises and very low voices of my neighbors (I am convinced that they are using some equipment such as an ultrasonic voice suppressor -------> to counteract this and detect the voice we need a module again at 433 mhz but heterodyne, to convert into a signal (ultrasonic or other) audible to 'human ear. My investigations as a detective but without being a 'detective. :)
@techtinkerin
@techtinkerin Жыл бұрын
Lol at ATAD, you know you're getting the best😄
@SimonCoates
@SimonCoates Жыл бұрын
Don't confuse that pin with REWOP 😉
@bandwidth64
@bandwidth64 Жыл бұрын
What if visualize signal with cheap SDR-USB Reciever? It have bandwidth up to 1,5 GHz
@WagTsX
@WagTsX Жыл бұрын
I got some of those modules in the past but never got much luck using them. I remember to achieve at best 1-3 meters. What is the typical practical range for the 433.92Mhz band on those modules? And maximum data baud rate?
@DiodeGoneWild
@DiodeGoneWild Жыл бұрын
I never tested the max baud rate, but the range was easily something like from the inside of a fridge or a freeze + 1 floor up + 10 meters sideways. Worked reliably. I never tried to bring the receiver or transmiter outside of the house, but I might try to. The range has to be decent given it can transmit from the fridge, which is almost all metal, like a faraday cage.
Жыл бұрын
@@jim9930 these TX modules are operating on crowded ISM spectrum, but I know these femtocells which are 20W omnidirectional easily can have a range of 1km@2.6/3.6 GHz LTE/5G. GSM is even more sensitive and works on a much lower SNR. Most NB-IoT modules operate at up to 23dBm and can have ranges of upwards of 10km.
@JohnDuthie
@JohnDuthie Жыл бұрын
Im too stupid to understand this but I still enjoy watching
@twocvbloke
@twocvbloke Жыл бұрын
I have a Rx & Tx set I extracted from an energy monitor (the sort that has a current clamp thing that clips round your incoming Live mains cable then broadcasted that to the display, it was rubbish!), never found any other use for it, so the two modules are sat in a container somewhere... :\
@_wave64_
@_wave64_ Жыл бұрын
Usually the antennas have much more pronounced effect on the range than the circuit itself - not sure how to make any scientific comparison however, not knowing the impedances of the individual circuits. dBm stands for dB "milliwatt", i.e. 0dBm means 1mW power.
@brainimplants
@brainimplants Жыл бұрын
Hey thanks for the video I will archive this for my collection. I have two pairs of these from 'singles day' 2015. $1.68 USD shipped to Canada. I haven't used them yet so the mods and comments here are really helpful. My tx has no coils on it. The documentation says use a 25 cm antenna for 433 mhz but it also says quarter wavelength which would actually be 17.3 cm. What length did you use? They are out of frame throughout the video.
@DiodeGoneWild
@DiodeGoneWild Жыл бұрын
I'm made 17.3 cm antennas.
@ProdigalPorcupine
@ProdigalPorcupine Жыл бұрын
The metal can on the transmitter is a SAW resonator.
@Shadow_of_STLKR
@Shadow_of_STLKR Жыл бұрын
Why DATA is labbeled ATAD in reverse xp
@04ajeet75
@04ajeet75 Жыл бұрын
Sir I am waiting for next episode of bench power supply restoration video 😁
@ches74
@ches74 Жыл бұрын
Some wireless home alarms use 433Mhz for sensors. Going to play with my system to see how to hook it into home automation.
@Codyjrt
@Codyjrt Жыл бұрын
A cheap UV5R disable the system on the 443.
Жыл бұрын
Don‘t use these 433 MHz systems, a signal jammer (or manipulated remote) is enough to block them. Look into a commercial solution like VeriSure, for example VeriSure works on multiple carriers and GSM (possibly LTE/NB-IoT?). It‘s more expensive and has a monthly cost, but it‘s generally resistant against single-band jamming attacks unless all carriers around operate on the same frequency.
@ches74
@ches74 Жыл бұрын
@ you'll have to explain that to Freidland and the other major alarm manufacturers that have used them extensively for burglar alarms. They're most likely aware and designed them to alarm if the signal is jammed. My only interest in them is to see how easy they are to tap into.
Жыл бұрын
@@ches74 maybe, but I wouldn‘t really trust it because this could also trigger many false-positives. There even was a case of one of these weather stations jamming GSM of a whole village and similarly, these 433 MHz modules also can fail. I had such a weather sensor for 433 MHz and in the end, it had a module that got hot and was creating RF noise.
@zaprodk
@zaprodk Жыл бұрын
The "crystal" is called a SAW (Surface Acoustic Wave) oscillator :)
@Jbrimbelibap
@Jbrimbelibap Жыл бұрын
Hi, i've swapped the cristal in mine for an 868.35 mhz one, but the circuit struggles to osclillate now. I've actually gotten my garage open with my modified fs1000A about a dozen times, though it's really not reliable. What components should I change in the circuit to get it to oscillate correctly ?
@dktr2
@dktr2 Жыл бұрын
Try SX1278, lora modulation gives amazing range, this receiver has amazing sensitivity.
@erezlevi5093
@erezlevi5093 Жыл бұрын
-140dB meter? The m stand for milli-watt
@DiodeGoneWild
@DiodeGoneWild Жыл бұрын
of course... everybody makes mistakes.
@AugustineAriola
@AugustineAriola Жыл бұрын
Very good and interesting video. Thumbs up.
@Leon-ts1nl
@Leon-ts1nl Жыл бұрын
What chip is this RF probe using and how long is the runtime of it?
@LutzSchafer
@LutzSchafer Жыл бұрын
By super regenerative do you mean a Pendelaudion?
@tempestshadow1158
@tempestshadow1158 Жыл бұрын
The problem with this receiver is when i connect the the LED To Vcc and Data, the LED just blinking like using NE555, when i transmitting the radio wave the LED turn off, when the radio wave does not transmitted from the transmitter the LED is blinking again, i Use 9 volt battery and antena from old pen coil
@Gengh13
@Gengh13 Жыл бұрын
You should get a tinySA, it is pretty cheap and useful.
@cocusar
@cocusar Жыл бұрын
I don't recall dBm being decibel meters lol but besides that, really cool video. I remember buying a pair of these, and hooking it up to a pic, and it never worked. I ended up hooking it to my pc serial port, as a loopback, and figured that there's more noise than signal, everything I could read was noise. even at 300bps I saw mostly noise instead of my data. completely crap. but yes, the transmitter looks nice, I think that metallic component is quite stable
@minazulkhan8287
@minazulkhan8287 Жыл бұрын
Great video . Please make more on RF
@omsingharjit
@omsingharjit Жыл бұрын
How lora is so Efficient that its range is around 4 to 5 km in just mili watt of power
@kolinevans9127
@kolinevans9127 Жыл бұрын
AWESOME VIDEO
@SauvikRoy
@SauvikRoy Жыл бұрын
If I added an analog signal in the data-in of the Tx, would it show up as a similar signal on the Rx? I shall read about transmitter types you mentioned. I am just a hobbyist.
@Basement-Science
@Basement-Science Жыл бұрын
It would be distorted as hell. You'd want a proper modulation circuit for that.
@williamfraser
@williamfraser 10 ай бұрын
I was able to transmit music using a circuit from Zafer Yildiz video. Added 6.8k resistor between tx vcc and data, and 3.3kOhm between mobile headphone output to data and ground. Rx used data to drive bc337 transistor base (via 10kOhm) as low side switch for speaker. It worked best with tx vcc
@Veso266
@Veso266 Жыл бұрын
Does your osciloscope run windows? (If yes, what windows does it run?) Tehtronix logic analyzer and scopes usualy ran windows and then a custom program on top of it
@Un_Pour_Tous
@Un_Pour_Tous Жыл бұрын
Whats the schematics on that speaker setup you got?
@abusukar
@abusukar Жыл бұрын
An idea came to my mind..Is it possible to convert an IR remote into an RF remote control to control a TV or a DVD player?
@pirelli77
@pirelli77 Жыл бұрын
Very interesting. Pls more about this topic RF, Wifi...☺👍
@omsingharjit
@omsingharjit Жыл бұрын
9:14 The BigBang and Inflation Graph 😃
@FelinoAnticomunista
@FelinoAnticomunista Жыл бұрын
What about that 8T coil ??
@NikiBretschneider
@NikiBretschneider Жыл бұрын
AFAIK there are limitations how often you can transmit data on these frequencies. In fact, nobody cares about this until you transmit so often that it almost permanently jam another user. I came across the situation, when someone used these modules to distribute audio. Not the analog way, It sent one cca 400ms long packet every 1 second, which definitely jammed all remote controls used to lock/unlock cars, garage doors etc. in the whole street. Local authorities solved that issue and it was not the cheap way, the fine was huge. Be careful with these things. Despite the fact these bands looks like completely unmanaged, it could cost you a fortune if you do something stupid, like permanent transmission, or transmitting too often or too much data.
Жыл бұрын
Can you try out these RCWL0516 modules?
@gebebbebebebr
@gebebbebebebr Жыл бұрын
I bought a few of these to copy the parking lot gate at my house but the gate turned out to have a rolling code :/
@deterdamel7380
@deterdamel7380 Жыл бұрын
at least they're tried to stabilising the frequency on one side- the transmitter.. :)
@Kst_101
@Kst_101 Жыл бұрын
Cool
@snipersquad100
@snipersquad100 Жыл бұрын
Amplify the signal and make a car key remote-blocking device.
@mariandvoracek3020
@mariandvoracek3020 Жыл бұрын
možná to má být decibel nad miliwatem a ne decibelmítrs
@Sodabowski
@Sodabowski Жыл бұрын
Wait... was that english?
@MesutAtmaca
@MesutAtmaca Жыл бұрын
Full aliexpress best electronics
@T2D.SteveArcs
@T2D.SteveArcs Жыл бұрын
Ah OOK in the Khz .. okay 😅
@piconano
@piconano Жыл бұрын
I bought 2 pairs over 10 years ago, they sucked. This video reminded me to throw them out.
@frogz
@frogz Жыл бұрын
that isnt a data pin, its a atad pin!
@sammin5764
@sammin5764 Жыл бұрын
🌟🌟🌷🌟🌟
@moeinsp2027
@moeinsp2027 Жыл бұрын
👍👋🇮🇷
@TibiC
@TibiC Жыл бұрын
What's the deal with the accent? Is it intentional? I'm European but I never heard anyone talk like this...
@ProdigalPorcupine
@ProdigalPorcupine Жыл бұрын
He's Czech, and I love his accent! So clear and unique. His English is excellent, IMO.
@TibiC
@TibiC Жыл бұрын
@@ProdigalPorcupine I know his english is good and that he's Czech, but that is one funky accent. I'm just super surprised I don't see people talking about it.
@inse001
@inse001 Жыл бұрын
I enjoy both the accent and the content
@marcinborkowicz2557
@marcinborkowicz2557 Жыл бұрын
So, this transmitter is just fancy, wireless telegraph. No elegance in this device at all. You can attach a telegraph key and send Morse's Code over high frequency EM spectrum.
@nescius2
@nescius2 Жыл бұрын
really hard to listen to ..is it czech accent? too bad, since the understandable parts sound interesting
@jamesjohn2537
@jamesjohn2537 Жыл бұрын
Diodegonewild 😂 you need analog oscilloscope is much more better
@jamesjohn2537
@jamesjohn2537 Жыл бұрын
Nice you have analog once
@TomStorey96
@TomStorey96 Жыл бұрын
ATAD ... Clearly this is for big endian data transmission only 😂
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