{"id":35,"date":"2013-05-01T21:01:53","date_gmt":"2013-05-01T21:01:53","guid":{"rendered":"https:\/\/ca.rstenpresser.de\/blag\/?p=35"},"modified":"2013-05-01T21:04:16","modified_gmt":"2013-05-01T21:04:16","slug":"reworking-a-frsky-d4r-ii-receiver","status":"publish","type":"post","link":"https:\/\/ca.rstenpresser.de\/blag\/2013\/05\/reworking-a-frsky-d4r-ii-receiver\/","title":{"rendered":"Reworking a FrSky D4R-II Receiver"},"content":{"rendered":"\n\t\t<div id='gallery-1' class='gallery galleryid-35 gallery-columns-3 gallery-size-thumbnail gallery1'><script type=\"text\/javascript\">\r\n\/\/ <![CDATA[\r\n\tjQuery(document).ready(function () {\r\n\t\tjQuery(\".gallery1 a\").attr(\"rel\",\"gallery1\");\t\r\n\t\tjQuery('a[rel=\"gallery1\"]').colorbox({maxWidth:\"95%\", maxHeight:\"95%\",title: function(){ return jQuery(this).children().attr(\"alt\"); }, });\r\n\t});\r\n\/\/ ]]>\r\n<\/script>\n<figure class=\"gallery-item\">\n<div class=\"gallery-icon\">\r\n<a href=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/back.jpg\" title=\"\" rel=\"gallery1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/back-150x150.jpg\" width=\"150\" height=\"150\" alt=\"\" \/><\/a>\r\n<\/div><\/figure><figure class=\"gallery-item\">\n<div class=\"gallery-icon\">\r\n<a href=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/front-with-voltage-divider.jpg\" title=\"\" rel=\"gallery1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/front-with-voltage-divider-150x150.jpg\" width=\"150\" height=\"150\" alt=\"\" \/><\/a>\r\n<\/div><\/figure><figure class=\"gallery-item\">\n<div class=\"gallery-icon\">\r\n<a href=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/TTL-Signal-Uart.jpg\" title=\"\" rel=\"gallery1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ca.rstenpresser.de\/wp-files\/2013\/05\/TTL-Signal-Uart-150x150.jpg\" width=\"150\" height=\"150\" alt=\"\" \/><\/a>\r\n<\/div><\/figure>\r\n\t\t<\/div>\n\n<p>Since i want to use telemetry with my soon-to-be-finished uavp-ng quadcopter i decided to use a FrSky two-way-telemetry system. Unfortunately the enigneers at FrSky choose to invert the serial signal which wont work on the hw0.24-mini.<\/p>\n<p>Thats why i took a closer look at the receiver pcb. Fortunately it was quite easy to identify the UART-Pins with TTL levels. I removed the two transistors and some resistors which arent needed anymore.<\/p>\n<p>The pinheader was also removed in this process. I added a bridge on ch3&amp;4 to active CPPM-mode.<\/p>\n<p>As a additional modification\u00c2\u00a0 a voltage divider was installed. The AD2-Input of the receiver works up to 3.3Volt. With a 3k3 and a 10k resitor i was able to build a network with a convenient 1:4 scale factor. With 4*3.3Volt &gt; 13V i can monitor the voltage of a 3S LiPo \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Since i want to use telemetry with my soon-to-be-finished uavp-ng quadcopter i decided to use a FrSky two-way-telemetry system. Unfortunately the enigneers at FrSky choose to invert the serial signal which wont work on the hw0.24-mini. Thats why i took a closer look at the receiver pcb. Fortunately it was quite easy to identify the &hellip; <a href=\"https:\/\/ca.rstenpresser.de\/blag\/2013\/05\/reworking-a-frsky-d4r-ii-receiver\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Reworking a FrSky D4R-II Receiver<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[11,14,110],"_links":{"self":[{"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/posts\/35"}],"collection":[{"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/comments?post=35"}],"version-history":[{"count":5,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/posts\/35\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/posts\/35\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/media?parent=35"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/categories?post=35"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ca.rstenpresser.de\/blag\/wp-json\/wp\/v2\/tags?post=35"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}