{"id":253,"date":"2016-02-09T19:51:14","date_gmt":"2016-02-09T19:51:14","guid":{"rendered":"https:\/\/deelmanl.wordpress.com\/?page_id=253"},"modified":"2016-02-09T19:51:14","modified_gmt":"2016-02-09T19:51:14","slug":"radio-beacon","status":"publish","type":"page","link":"https:\/\/www.nerorockets.nl\/index.php\/radio-beacon\/","title":{"rendered":"RADIO BEACON"},"content":{"rendered":"<p>The 433mHz AM beacon was updated. The \u00a0Atmel 328p now has its own PCB instead of the &#8220;legs-up-beetle&#8221; style of previous versions. The further reduce the size of the unit, the 328p board was placed in a sandwich orientation with the transmitter module.<\/p>\n<p>Despite the small size, the board now has a programming port to enable reprogramming of the module.<\/p>\n<p>Below the 433mHz beacon module in front of an Arduino Uno for size comparison.<\/p>\n\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>RADIO BEACON<\/strong><\/h2>\n<p>The radio beacon was designed to allow for extended searches of lost rockets when all other navigational devices have failed (Talking GPS and GPS\/SMS tracker). The beacon uses a low power (50mW) AM\u00a0transmitter operating at 433.92 mHz.<\/p>\n<p>An Atmel 328p running on the internal 8mHz oscillator is powered by a small lipo.\u00a0The 328p is the only component in the design to minimize size and power consumption. To allow for operation for several days, the 328p produces a short tone (60ms) before going into hibernation for several seconds.<\/p>\n<p>The AM signals are picked up by a velleman RX433 receiver which has an analog output pin. Using a simple yagi antenna and a headset, it is easy to determine the direction and signal strength of the received signals (much better than with FM signals).<\/p>\n<p><a href=\"https:\/\/deelmanl.wordpress.com\/wp-content\/uploads\/2016\/02\/dsc_0334-e1455047887184.jpg\" rel=\"attachment wp-att-267\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-267\" src=\"https:\/\/deelmanl.wordpress.com\/wp-content\/uploads\/2016\/02\/dsc_0334-e1455047887184.jpg?w=676\" alt=\"DSC_0334\" width=\"676\" height=\"380\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The 433mHz AM beacon was updated. The \u00a0Atmel 328p now has its own PCB instead of the &#8220;legs-up-beetle&#8221; style of previous versions. The further reduce the size of the unit, the 328p board was placed in a sandwich orientation with the transmitter module. Despite the small size, the board now has a programming port to [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-253","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/pages\/253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/comments?post=253"}],"version-history":[{"count":0,"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/pages\/253\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.nerorockets.nl\/index.php\/wp-json\/wp\/v2\/media?parent=253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}