MakerGram Logo

    MakerGram

    • Register
    • Login
    • Search
    • Categories
    • Recent
    • Popular
    • Tags
    • Users
    • Groups

    Customizable RF frequency Generator and receiver

    General Discussion
    2
    2
    574
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • kowshik1729
      kowshik1729 last edited by

      Hello guys,

      I would like to know how can we generate RF waves with customizable frequency. For example the generic RF modules which we get in the market operates at a frequency of 433MHz. But I wanna make a transmitter and receiver pair that can operate on freqeuncy that can be customized by me. How can I do it? Please guide me. Thanks in advance..!!

      1 Reply Last reply Reply Quote 0
      • salmanfaris
        salmanfaris last edited by salmanfaris

        Hi @kowshik1729,

        This is an interesting question, Traditionally we are using mixers, filters, amplifiers, modulators/demodulators, detectors, etc to build a radio communication system and it's tightly coupled with hardware. And there are many types of frequency modulation like FM, AM, FSK, LoRa etc.

        Capture.JPG

        (Source : https://en.wikipedia.org/wiki/Radio)

        To generate a different band we need to use a specific combination of mixers, filters, amplifiers, modulators/demodulator, also most of the scenario we only use a specific frequency to communicate in cost-efficient ways like 2.4 GHz for WiFi and Bluetooth but we use different modulations like GFSK in BT Classic and DSSS, FHSS in IEEE802.11 etc. And building many different combinations of mixers, filters, amplifiers are not cost-effective and economic.But using the SDR (Software Defines Radio ) we can achieve this,

        A basic SDR system may consist of a personal computer equipped with a sound card, or other analogue-to-digital converter, preceded by some form of RF front end. Significant amounts of signal processing are handed over to the general-purpose processor, rather than being done in special-purpose hardware (electronic circuits). Such a design produces a radio which can receive and transmit widely different radio protocols (sometimes referred to as waveforms) based solely on the software used. (Source: https://en.wikipedia.org/wiki/Software-defined_radio)

        So as an answer to your question, yes we can generate radio frequency but it's high cost and not economical, also with the help of the SDR system we can solve the issues.

        Resource :

        • https://en.wikipedia.org/wiki/Software-defined_radio
        • https://www.youtube.com/watch?v=xQVm-YTKR9s
        • https://www.youtube.com/watch?v=TZmHgIPBLDo

        You can also try SDR via online using https://eshail.batc.org.uk/nb/ , it was hosted at Goonhilly Earth Station in Cornwall, England.

        1 Reply Last reply Reply Quote 1
        • First post
          Last post

        Recent Posts

        • M

          RTA offers a diverse range of stylish apparel, including rta clothing staples like rta hoodie men, men's rta hoodie, and the sleek black rta hoodie. Their denim collection features must-haves such as rta denim pants, rta denim mens, rta denim jeans, rta skinny jeans, rta jeans mens, rta jeans, and rta denim shorts. Complete your look with rta shorts, rta shirts, rta t shirt, rta t shirt men, and cozy options like the rta sweatshirt. For a functional touch, add rta cargo pants to your wardrobe and create the ultimate rta outfit for any occasion.

          • read more
        • J

          So today, I was reading about a kid who got a custom prosthetic arm printed like really. Holly molly! People are printing prosthetics nowadays! That’s when I stumbled upon Curewith3D, and wow, 3D printing in healthcare is on another level.

          Apparently, I found out that they’re not just 3d printing limbs. They actually use patient-specific scans (like CT/MRI data) and some DICOM files to design prosthetics that fit the person’s body perfectly. Every angle, curve, and dimension is matched to the individual. No more bulky or uncomfortable fits.

          What’s wild is how fast and affordable the process is. Instead of traditional molds and weeks of waiting, Curewith3D can design, print, and deliver a customized prosthetic in a fraction of the time.

          I didn’t know 3D printing services could be this life-changing, and it's happening right here in India. It really makes you wonder what else we’re going to be printing next.

          Anyone else heard of this or know someone who’s used a 3D printed prosthetic? Would love to hear more.

          • read more
        • R

          I am trying to set up a janus webrtc to stream an RTSP to an HTML page.
          I have followed the getting-started steps by Janus-gateway official github repo.

          Since I am new to web development. I do not understand how to host the Webrtc server. can anyone guide me to set up an HTML page that can display a video stream from an RTSP server using janus webrtc?

          • read more
        • @zainmuhammed Can try capturing the GPS when the device is starting the loop instead after joining the LoRaWAN and see?

          You can put the GPS value on top of the loop or setup function.

          Also, what kind of gateway are you using? Is it configured okay, OTA is done?

          • read more
        • @salmanfaris Today I tried after connecting a 18650 cell,
          WhatsApp Image 2024-04-12 at 10.40.06_c7d1947e.jpg WhatsApp Image 2024-04-12 at 10.40.05_897b8bb6.jpg
          Data getting in console after integration of both lora and gps.
          3f45cfe7-0061-4328-8c55-ef0a73385203-image.png
          here you can see that GPS value is 0,0. also in my previous post you can see that GPS value is not reading.
          Also the status LED is active after it is connected to the satellite.

          • read more
        By MakerGram | A XiStart Initiative | Built with ♥ NodeBB
        Copyright © 2023 MakerGram, All rights reserved.
        Privacy Policy | Terms & Conditions | Disclaimer | Code of Conduct