{"id":181,"date":"2015-12-16T22:07:14","date_gmt":"2015-12-16T22:07:14","guid":{"rendered":"http:\/\/ceptimus.co.uk\/?p=181"},"modified":"2022-06-03T10:58:15","modified_gmt":"2022-06-03T09:58:15","slug":"cheap-pov-persistence-of-vision-clock-kit","status":"publish","type":"post","link":"https:\/\/ceptimus.co.uk\/index.php\/2015\/12\/16\/cheap-pov-persistence-of-vision-clock-kit\/","title":{"rendered":"Cheap POV (persistence of vision) clock kit"},"content":{"rendered":"<p><a href=\"https:\/\/ceptimus.co.uk\/wp-content\/uploads\/2015\/12\/POVclock.jpg\" rel=\"attachment wp-att-182\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-182\" src=\"https:\/\/ceptimus.co.uk\/wp-content\/uploads\/2015\/12\/POVclock-263x300.jpg\" alt=\"POVclock\" width=\"263\" height=\"300\"><\/a>These kits are available on Banggood.com for about $11 shipping included.&nbsp; Tricky soldering, and they don&#8217;t come with any instructions.&nbsp; There are instructions available on the website &#8211; but not unless you read Chinese.&nbsp; The pictures on the website help though.<\/p>\n<p>Anyway, I recommend the kit.&nbsp; Even if you can&#8217;t get it working properly, it&#8217;s worth the money for the parts alone &#8211; you get everything you need apart from a bit of strip board to solder the power supply components to, and a hunk of aluminium to act as a heat sink on one power transistor.<\/p>\n<p>It runs on about 4 volts up to 5 or so.&nbsp; I wouldn&#8217;t recommend going much above 5.5 volts as the &#8216;regulator&#8217; on the main board is just a small zener diode that leaks current away once the voltage gets up to 5.1&nbsp; It draws about a third of an amp &#8211; I run mine off a single LiPo cell.<\/p>\n<p>Gary asked about the inside of the box.&nbsp; Please see VoltLog&#8217;s build video &#8211; the only thing I did differently was to build up the circuit on some stripboard instead of in mid-air, and I added a bit of aluminium plate to the main power transistor to act as a heatsink.<\/p>\n<p><a href=\"https:\/\/ceptimus.co.uk\/wp-content\/uploads\/2015\/12\/POVbox.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-266\" src=\"https:\/\/ceptimus.co.uk\/wp-content\/uploads\/2015\/12\/POVbox-300x171.jpg\" alt=\"\" width=\"525\" height=\"299\"><\/a><\/p>\n<p>There are more (and bigger) photos of the top and bottom of my stripboard layout here:&nbsp;<a href=\"https:\/\/ceptimus.co.uk\/pov\/\"> https:\/\/ceptimus.co.uk\/pov\/<\/a><\/p>\n<p>Look at this video on the Voltlog YouTube channel to get an idea of how tricky it is to build.<\/p>\n<div align=\"center\"><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/eekJaO14eGo\" allowfullscreen=\"allowfullscreen\" width=\"448\" height=\"252\" frameborder=\"0\"><\/iframe><\/div>\n<p>I certainly got good value from it as it also comes without a program &#8211; so I wrote one, and no tool for uploading the program to the microcontroller.&nbsp; See my previous post for the upload tool.&nbsp; Here&#8217;s the link to the hex file for my clock program. (Right click and save as&#8230; if it opens up as a text file when you click on the link).<\/p>\n<p><a href=\"https:\/\/ceptimus.co.uk\/POVclock.hex\">https:\/\/ceptimus.co.uk\/POVclock.hex<\/a><\/p>\n<p>I made a quick video showing how to set the time.&nbsp; The camera settings were bad though &#8211; auto focus and strobing problems. \ud83d\ude41<\/p>\n<div align=\"center\"><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/ZDEMLMkG2C0\" allowfullscreen=\"allowfullscreen\" width=\"448\" height=\"352\" frameborder=\"0\"><\/iframe><\/div>\n","protected":false},"excerpt":{"rendered":"<p>These kits are available on Banggood.com for about $11 shipping included.&nbsp; Tricky soldering, and they don&#8217;t come with any instructions.&nbsp; There are instructions available on the website &#8211; but not unless you read Chinese.&nbsp; The pictures on the website help though. Anyway, I recommend the kit.&nbsp; Even if you can&#8217;t get it working properly, it&#8217;s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,9],"tags":[],"class_list":["post-181","post","type-post","status-publish","format-standard","hentry","category-programming","category-stc-micro"],"_links":{"self":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=181"}],"version-history":[{"count":1,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/181\/revisions"}],"predecessor-version":[{"id":596,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/181\/revisions\/596"}],"wp:attachment":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/categories?post=181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/tags?post=181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}