{"id":90,"date":"2023-02-12T02:44:21","date_gmt":"2023-02-12T02:44:21","guid":{"rendered":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/?p=90"},"modified":"2023-02-19T00:54:40","modified_gmt":"2023-02-19T00:54:40","slug":"zhejia-yangs-status-report-2-11","status":"publish","type":"post","link":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/2023\/02\/12\/zhejia-yangs-status-report-2-11\/","title":{"rendered":"Zhejia’s Status Report 2\/11"},"content":{"rendered":"

I worked on the inductive charger, first making my own coil, then trying on some coils I acquired for more testing. I first calculated that the resonant frequency would be around 24 kHz, with the inductance of 43 microhenries in series with a capacitor of 1 microfarads. However, experimentally, I found that the real resonant frequency was very difficult to measure accurately as simply switching the direction of the probes would change the frequency at which I measured the highest output voltage for a given 5v input. Eventually, I settled on a ~41kHz resonant frequency for the inductor, which gave me an output voltage of ~3.4v (with a 5v input), which is close to the charging voltage for our planned small LIPO batteries, but I believe more investigation is required for the strange resonant measurement behavior.<\/p>\n

\"\"<\/p>\n

We are mostly on schedule, having ordered\/acquired the experimental parts needed, but the strange resonant behavior did put us a little behind schedule for proof of concept, which I will work on more with Korene next week to resolve. Asking staff may be an option as well.<\/p>\n

In the next week, we will finish the proof of concept and create the circuit that integrates and stabilizes the magnetic charging for integration with the boards *when* they get here. (To be clear, the boards will likely not get here next week).<\/p>\n","protected":false},"excerpt":{"rendered":"

I worked on the inductive charger, first making my own coil, then trying on some coils I acquired for more testing. I first calculated that the resonant frequency would be around 24 kHz, with the inductance of 43 microhenries in series with a capacitor of 1 microfarads. However, experimentally, I found that the real resonant … <\/p>\n

Continue reading “Zhejia’s Status Report 2\/11”<\/span><\/a><\/p>\n","protected":false},"author":715,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/posts\/90"}],"collection":[{"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/users\/715"}],"replies":[{"embeddable":true,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/comments?post=90"}],"version-history":[{"count":4,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/posts\/90\/revisions"}],"predecessor-version":[{"id":101,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/posts\/90\/revisions\/101"}],"wp:attachment":[{"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/media?parent=90"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/categories?post=90"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/course.ece.cmu.edu\/~ece500\/projects\/s23-teamb1\/wp-json\/wp\/v2\/tags?post=90"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}