{"id":15066441,"url":"https://github.com/pcs-electronics/miniocxo","last_synced_at":"2026-01-24T09:33:27.529Z","repository":{"id":256726834,"uuid":"856226824","full_name":"pcs-electronics/miniocxo","owner":"pcs-electronics","description":"Source code and schematics for the mini OCXO (Oven Controlled Crystal Oscillator) generator with independently programmable 3x outputs","archived":false,"fork":false,"pushed_at":"2025-07-10T16:43:20.000Z","size":2037,"stargazers_count":3,"open_issues_count":0,"forks_count":1,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-07-10T23:01:59.244Z","etag":null,"topics":["arduino","ch552","hamradio","ocxo","oscillator","qo-100"],"latest_commit_sha":null,"homepage":"https://www.pcs-electronics.com/shop/rigexpert-products/other-reu-rigexpert-products/ocxo-3-channel-signal-generator-330khz-to-330mhz-2/","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/pcs-electronics.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2024-09-12T08:00:16.000Z","updated_at":"2025-07-10T16:39:33.000Z","dependencies_parsed_at":null,"dependency_job_id":"cc08fbab-a123-42ca-8077-b3f0ae3a3a57","html_url":"https://github.com/pcs-electronics/miniocxo","commit_stats":null,"previous_names":["pcs-electronics/miniocxo"],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/pcs-electronics/miniocxo","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pcs-electronics%2Fminiocxo","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pcs-electronics%2Fminiocxo/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pcs-electronics%2Fminiocxo/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pcs-electronics%2Fminiocxo/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/pcs-electronics","download_url":"https://codeload.github.com/pcs-electronics/miniocxo/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pcs-electronics%2Fminiocxo/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28723236,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-24T08:27:05.734Z","status":"ssl_error","status_checked_at":"2026-01-24T08:27:01.197Z","response_time":89,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["arduino","ch552","hamradio","ocxo","oscillator","qo-100"],"created_at":"2024-09-25T01:08:06.032Z","updated_at":"2026-01-24T09:33:27.524Z","avatar_url":"https://github.com/pcs-electronics.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Mini OCXO (Oven Controlled Crystal Oscillator) generator with independently programmable 3x outputs, 330 kHz to 330 MHz (1 Hz step), plus a direct 10 MHz output\n\n## [\u003e\u003e Assembled units: check the PCS Electronics shop! \u003c\u003c](https://www.pcs-electronics.com/shop/rigexpert-products/other-reu-rigexpert-products/ocxo-3-channel-signal-generator-330khz-to-330mhz-2/)\n\n![Image](/IMAGES/miniocxo-example.png)\n![Image](/IMAGES/miniocxo-qo100.png)\n![Image](/IMAGES/miniocxo-front.png)\n![Image](/IMAGES/miniocxo-rear.png)\n![Image](/IMAGES/miniocxo-pcb.png)\n\n## Areas of potential use:\n* Stable reference frequency for radio communications: transmitters, receivers\n* Amateur radio: QO-100, VHF, SHF, FT8\n* Laboratory-grade, stable RF signal source\n* High end audio for synchronizing Hi-Fi ADCs and DACs\n* Analog and digital radio and TV broadcasting\n* Laboratory work, with three independent channels precisely in phase and thermally stabilized\n\n## Default frequencies are 40 MHz for output 1, 25 MHz for output 2, 24 MHz for output 3.\n\nTo change output frequencies:\n\n* Connect the OCXO to your computer by using a standard “type C” USB cable;\n* Run a serial terminal software, such as PuTTY or HyperTerminal, and open a virtual serial port (baudrate and other settings do not matter);\n* Type “?” (without quotes) and press Enter for a help;\n* Enter “fq 1 30000000” to set the frequency of output 1 to the value of 30 MHz;\n* Change other output’s frequencies, if needed, and then enter “load” to update the outputs;\n* The frequency settings will be stored in a non-volatile memory.\n\nThere are two user profiles; use the \"Set\" button to switch between the profiles.\n\nFine-tune the frequency (plus-minus about 1ppm) with a \"-+\" trimmer.\n\n## Modify/compile the code yourself: set up the Arduino environment\n\nInstall the board as described here: https://github.com/DeqingSun/ch55xduino\n\nPlease use version 0.0.16 !!!\n\n( See also: https://sourceforge.net/p/sdcc/bugs/3569/ )\n\n\u003eTools - Board - CH5xx boards - CH552 \n\u003e\n\u003eTools - USB settings - Default CDC \n\u003e\n\u003eTools - Upload method - USB \n\u003e\n\u003eTools - Clock source - 24 MHz internal \n\n## Updating the firmware:\n\nInstall and run the WCHISPTool from http://www.wch-ic.com/downloads/WCHISPTool_Setup_exe.html\n\n\u003eTab: CH55x Series \n\u003e\n\u003eChip model: CH552, download type: USB \n\u003e\n\u003eUser file: select the HEX file with a firmware. \n\nConnect (short circuit) the PROG jumper on the board, cycle the power (do not disconnect the USB port!), then remove the PROG jumper\n\nCheck the Device Manager: under \"Interface\" branch, there should be a \"USB module\" or \"WinChipHead\" device.\n\nIf there is an \"Unknown device\", go to the WCHISPTool folder and install the driver.\n\nIn the WCHISPTool, click Search and make sure the \"MCU model: CH552\" appeared in the list.\n\nClick Download\n\nCycle the power\n\nNow the Device manager will list a new \"USB Serial Port\" under \"Ports (COM \u0026 LPT\").\n\nAlternatively, instead of WCHISPTool, use vnproch55x :\n\n\u003evnproch55x firmware.hex -r2\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpcs-electronics%2Fminiocxo","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fpcs-electronics%2Fminiocxo","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpcs-electronics%2Fminiocxo/lists"}