Radio Control

Radio Control https://community.element14.com/challenges-projects/project14/radiocontrol/ Build RF Projects including circuits, antennas, SDR, HAM, modulation/demodulation, radar, and more!en-USTelligent Community 12<link>https://community.element14.com/challenges-projects/project14/radiocontrol/b/blog/posts/software-defined-radio-sdr-experiment-board?CommentId=980940ff-4d30-4c34-b865-df90d6d04e5e</link><pubDate>Tue, 16 Dec 2025 01:39:00 GMT</pubDate><guid isPermaLink="false">93d5dcb4-84c2-446f-b2cb-99731719e767:980940ff-4d30-4c34-b865-df90d6d04e5e</guid><dc:creator>Fruitpunch12</dc:creator><description>Hi Shabaz, thank you for the schematic since I am new to RF and hobby radio I have a few questions about the schematic design. First I see you used a 7805 voltage regulator for the power source, can I make my own voltage regulator with power mosfets to preform the same function? I also see you said you used a sd5400 which is quad n channel fet array. I also wanted to ask if I can use something like 4 RFP30N06LE's in parallel. I read that I could replace the dual channel op amp for something else so I might try a design with an NE5532 or TDA2822 in kicad. I'm just using your schematics as a template for a quadrature demodulator and wanted to know if some of these changes make sense with what your original plan with this project was since I am new to RF circuits as a whole. I plan on using this design for a SDR based transceiver using a teensy 4.1 micro controller for the ADC conversion and I/Q signal processing since I've seen some projects already using it for an SDR set up. Just wanted to ask some of those questions.</description></item><item><title /><link>https://community.element14.com/challenges-projects/project14/radiocontrol/b/blog/posts/software-defined-radio-sdr-experiment-board?CommentId=32b254cf-7ef9-4392-9d5a-65a30fe947cb</link><pubDate>Wed, 06 Dec 2023 23:21:00 GMT</pubDate><guid isPermaLink="false">93d5dcb4-84c2-446f-b2cb-99731719e767:32b254cf-7ef9-4392-9d5a-65a30fe947cb</guid><dc:creator>shabaz</dc:creator><description>Sorry I just saw this, so the response is a year late : ( I'm sure you've moved on, but just so there is an answer here: The board is available from any PCB supplier (eg. JLCPCB), by uploading the file that is attached to the blog post: It is quite cheap, a few $ for the board and shipping if the slowest shipping option is selected. Regarding the drive to the mixer, it is a square wave (created by the 7474 with quadrature signals). The input to the board needs to ideally be a square wave too, although some misshapenness is OK there. The input to the board should ideally be 5V logic levels (a signal generator, or a Si5351 chip can be used, but the latter will need a buffer circuit to create 5V logic levels; the default 3.3V output from Si5351 won't be sufficient. The circuit below would do the job).</description></item><item><title /><link>https://community.element14.com/challenges-projects/project14/radiocontrol/b/blog/posts/software-defined-radio-sdr-experiment-board?CommentId=43fa3b0b-33fd-4bae-a4b3-a1581daa55d2</link><pubDate>Wed, 06 Dec 2023 23:08:00 GMT</pubDate><guid isPermaLink="false">93d5dcb4-84c2-446f-b2cb-99731719e767:43fa3b0b-33fd-4bae-a4b3-a1581daa55d2</guid><dc:creator>shabaz</dc:creator><description>Nice! As well as SDR itself, decent waterfall displays are one of the best things ever to happen in radio : )</description></item><item><title /><link>https://community.element14.com/challenges-projects/project14/radiocontrol/b/blog/posts/software-defined-radio-sdr-experiment-board?CommentId=a4eba928-0f47-4b7f-aa9a-61e265605222</link><pubDate>Sun, 03 Dec 2023 12:44:00 GMT</pubDate><guid isPermaLink="false">93d5dcb4-84c2-446f-b2cb-99731719e767:a4eba928-0f47-4b7f-aa9a-61e265605222</guid><dc:creator>Jan Cumps</dc:creator><description>SDR trolling is a thing now: Source: https://youtu.be/h-fKtt7nRSg?si=UprlB7hwqozUFfD3</description></item><item><title /><link>https://community.element14.com/challenges-projects/project14/radiocontrol/b/blog/posts/software-defined-radio-sdr-experiment-board?CommentId=4a28b865-2c5f-41aa-ba78-bbb4fc87057a</link><pubDate>Wed, 08 Jun 2022 17:55:00 GMT</pubDate><guid isPermaLink="false">93d5dcb4-84c2-446f-b2cb-99731719e767:4a28b865-2c5f-41aa-ba78-bbb4fc87057a</guid><dc:creator>Observer</dc:creator><description>I am a QSD fanatic ! From where I can buy the board? Also, can the 7474 be configured as a simple squarewave driver to the mixer ?</description></item><item><title>File: SDRhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/145682Fri, 29 Apr 2022 05:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:93f99e25-3f44-4771-ab54-4f54f0751a21Jan CumpsSDR with FPGAfpgasdrFile: SDR Radio China Internationalhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/145681Fri, 29 Apr 2022 05:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:bc8a2ee6-261c-40b5-a83b-e44c6f98128bJan CumpsSDR Radio China InternationalamsdrFile: SDR scanning with an FPGAhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/145680Fri, 29 Apr 2022 05:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:170b140f-c54f-4a2f-8b5c-ea04f7b15d44Jan CumpsSDR scanning with an FPGAfpgasdrFile: SDRhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/145679Fri, 29 Apr 2022 05:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:2195138e-ed79-4b38-bd7f-9d7bbf013823Jan CumpsSoftware Defined RadiosdrFile: SDR scanning with an FPGAhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/145678Fri, 29 Apr 2022 05:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:dd9e43ec-647d-452b-a4df-6153814c014cJan CumpsSDR scanning with an FPGAfpgasdrWiki Page: Featured Content Triptych Setup Dochttps://community.element14.com/challenges-projects/project14/radiocontrol/w/setup/26939/featured-content-triptych-setup-docSun, 05 Dec 2021 17:57:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:db51067a-23f5-4e5a-870d-6a7066ceced4tariq.ahmadSoftware Defined Radio (SDR) Experiment Board EM Surfer FPGA: a quadrature oscillator with rotary encoder controlWiki: Setuphttps://community.element14.com/challenges-projects/project14/radiocontrol/w/setupSun, 05 Dec 2021 17:57:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:290569fd-e60b-4f69-abfc-a239e76f1875Wiki: Documentshttps://community.element14.com/challenges-projects/project14/radiocontrol/w/documentsSat, 20 Nov 2021 01:52:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:121f6927-a476-4cd7-8800-2bec4aaa7354File: Software Defined Radio of Shabaz - 1st tryhttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videos/144351Sat, 13 Nov 2021 19:15:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:81a8fff2-fc84-4728-9056-1b8ed756e261Jan CumpsI'm building the radio that Shabaz has published on element14. Blog: https://www.element14.com/community/community/project14/radiocontrol/blog/2021/08/04/software-defined-radio-sdr-experiment-boardsdrFiles: Managed Videoshttps://community.element14.com/challenges-projects/project14/radiocontrol/m/managed-videosSat, 13 Nov 2021 19:15:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:1d6ce056-60bb-453c-b750-d5a758fc1a95Wiki Page: Setuphttps://community.element14.com/challenges-projects/project14/radiocontrol/w/setupWed, 10 Nov 2021 04:40:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c3284ca7-edf1-42fc-aa7b-430e3b99c199ChristyZThe documents in this Wiki can be used to populate widgets on the group home page. "Featured Content Triptych Setup Doc" contains the 3 featured items - image, descriptive text, and button, that you can edit to change the image, text and link/button text as appropriate for this group. If there isn't already a 3-box widget showing on the home page for this group, to display the document, you will need to get someone with Admin rights (one of the Devs or Pauline's team) to add a Wiki Viewer widget for you and insert the url to the document. From then on, you will be able to update the content of that widget by making changes to the document. "Featured Video Setup Doc" lets you embed a video - YouTube, Brightcove, or an image that links to a document somewhere on the site that contains the video - and that can also be put into a Wiki Viewer (in the skinny column) using the url. From then on, that widget can be updated by changing out the image/link or embedded video that is in that document.Wiki Page: Featured Video Setup Dochttps://community.element14.com/challenges-projects/project14/radiocontrol/w/setup/26938/featured-video-setup-docWed, 10 Nov 2021 04:40:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c31856c4-6022-43b6-91bb-323b836d6abdChristyZfeaturedVideoWiki Page: Pollshttps://community.element14.com/challenges-projects/project14/radiocontrol/w/pollsTue, 02 Nov 2021 16:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:42ae5396-c208-4db7-8c1b-f5636082efc6migration.userWiki Page: Documentshttps://community.element14.com/challenges-projects/project14/radiocontrol/w/documentsTue, 02 Nov 2021 16:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:39a77337-ca85-4663-b93f-f036d9cab0ecmigration.userForum: Forumhttps://community.element14.com/challenges-projects/project14/radiocontrol/f/forumTue, 02 Nov 2021 16:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:a2296ed7-0641-4517-83b5-b4f98223370c