{"id":16013899,"url":"https://github.com/drom/pulsar","last_synced_at":"2026-03-19T21:01:31.630Z","repository":{"id":28425891,"uuid":"31940765","full_name":"drom/pulsar","owner":"drom","description":":speaker: Ultrasonic air speed sensor","archived":false,"fork":false,"pushed_at":"2015-03-10T15:29:13.000Z","size":268,"stargazers_count":1,"open_issues_count":0,"forks_count":2,"subscribers_count":5,"default_branch":"master","last_synced_at":"2025-01-24T19:41:21.034Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Verilog","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/drom.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2015-03-10T05:52:46.000Z","updated_at":"2022-07-02T23:34:36.000Z","dependencies_parsed_at":"2022-09-03T05:21:28.302Z","dependency_job_id":null,"html_url":"https://github.com/drom/pulsar","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2Fpulsar","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2Fpulsar/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2Fpulsar/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2Fpulsar/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/drom","download_url":"https://codeload.github.com/drom/pulsar/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":244248141,"owners_count":20422722,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","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":[],"created_at":"2024-10-08T15:00:58.027Z","updated_at":"2026-01-03T17:42:41.125Z","avatar_url":"https://github.com/drom.png","language":"Verilog","funding_links":[],"categories":[],"sub_categories":[],"readme":"## Ultrasonic Transducer experiments\n\n### experiment #1\n\nOff-the-eBay-shelf 40 KHz, 25 mm x2 transducers:\n\n![alt text](40khz_25mm_transducer.JPG \"Transducer\")\n\nTerasic DE0-Nano board with Altera Cyclone IV FPGA (EP4CE22F17C6):\n\n![alt text](http://www.terasic.com.tw/attachment/archive/593/image/image_60_thumb.jpg \"Terasic DE0-Nano board\")\n\n:red_circle: *Red line:* (Transmitter) direct 3.3V drvive from FPGA. 3 pulse train: 40KHz\n\n:full_moon: *Yellow line:* (Receiver) 200mm distance. ~600us latency:\n\n![alt text](20130613_382959.jpg \"Oscillogram\")\n\nObserving LONG Reverberation after the end of the signal: \u003e600us\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdrom%2Fpulsar","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdrom%2Fpulsar","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdrom%2Fpulsar/lists"}