Questions tagged [433mhz]
433MHz is a license-free area of the RF spectrum in many countries. It tends to be restricted to low power and bandwidth but allows simple modulation schemes making it popular for low cost / bandwidth applications such as keyless entry and alarm systems.
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More transmit power for 433MHz transmitter module by increasing voltage
I am using these 433MHz modules. According to the product information, I can supply the transmitter from 3-12 Volts. I am sending the data from an arduino (5V data) and want to power the transmitter ...
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Using 433 MHz Tx/Rx without encoders/decoders
I want to use Tx & Rx Modules of 433 MHz standard modules you find everywhere.
I just want Tx module powered up and Rx module should respond (probably key press) on Tx module. I don't have any ...
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Why is 433 MHz still used?
The new RF frequencies are 868 MHz for Europe and 915 MHz for the US. I heard 433 MHz is barely regulated, read: it's chaos. Then why are 433 MHz RF modules still used? Are they cheaper to produce?
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Improve range of 433MHz RF link
I have a system comprised of a wireless sensor which transmits temperature readings to a main base.
The wireless sensor system is made up of:
12F683 pic to take the temperature reading (manchester ...
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What will it take to build a DIY 2km (city conditions) RF transmitter (433Mhz)?
This is my first question on this site. I am not an electronics/electrical engineer so pardon my depth of knowledge.
I am trying to build an RF transmitter/receiver. These are my end goals :
a text (...
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433 Mhz + Attiny85 improve range
I want to send information from my Attiny85 to my Raspberry.
For the moment.
Attiny and Emitter work on 5V
Emitter have a 433 Mhz 1/2 waveform antenna
I'am using virtual wire
Raspberry receiver work ...
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433.92 Noise Is Different Across The Same Type Of Devices
I have two 433.92 RF receivers of type XY-MK-5V and one of type RXB12 . The question that brings we here is this:
Lets give the receivers names:
...
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How can I modify the frequency of a simple 433MHz transmitter module?
How can I change the frequency of a simple RF transmitter?
These are the transmitters in question:
Background Research
On this question s3c says:
To change the ...
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Recent reference for "why not to build RF circuits on breadboard"
I've noticed the occasional
I've built my FM modulator/RF mixer/433 MHz oscillator according to plans from The Internet on a breadboard, now it doesn't work.
We can usually refer the author to ...
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Generic 433MHz receiver, how to derive output signal voltage
I have a 433MHz receiver modules (Model number MX-05V) The input voltage is listed as 5V but they don't list the output voltage.
I have seen this used without level shifting in a project in ...
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basic RF transission in noisy environment
I built a little quadcopter, and I need to transmit some data to it in a max. 4-5 meters range.
The transmitter needs to transmit in a quarter of a sphere (the quadcopter will newer be "behind" the ...
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How do I change the frequency of an rf module?
I recently bought an AM radio transmitter/receiver from eBay.
It was only after I bought it, however, that I noticed that the frequency was 315/433 MHz. I live in the UK so only 433 MHz would be ...
user15682
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Two different length antennas can cause problems?
I am using two 443 MHz transceivers (FY-605 transceiver) with both having different antenna lengths. One antenna is around 12cm long and the other antenna is around 17cm long. Will this cause problems?...
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Wifi Channel vs a Sub 1 GHz channel of same width
If the same channel-width is allocated for a WiFi channel and also for a Sub-1 GHz channel, would the maximum allowable speed be the same for both channels theoretically?
If they differ, what is the ...
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433 MHz Antenna - Balanced Dipole + Balun?
I've got three 433MHz receivers (all the same type) and I would like to increase the range on them (by which I mean the physical distance that the receiver can detect the signal from the transmitter). ...
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Using cheap RF module encoding with UART in a commercial product
For my graduation project, I need to design a system that transmits several different data packets to the computer wirelessly. It needs to have a potential to be commercial product, so both functional ...
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Boosting power transmitted by 433MHz module from 5v to 12v
I have one of these transmitter modules attached to an Arduino Mega and currently powered by the Arduino Mega 5v pin.
I have locations that cannot receive the radio transmission because of lack of ...
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