{"id":305,"date":"2018-06-23T12:50:50","date_gmt":"2018-06-23T12:50:50","guid":{"rendered":"https:\/\/ejmilton.uk\/?p=305"},"modified":"2018-09-29T13:49:29","modified_gmt":"2018-09-29T13:49:29","slug":"photodiode-amplifier","status":"publish","type":"post","link":"https:\/\/ejmilton.uk\/index.php\/2018\/06\/23\/photodiode-amplifier\/","title":{"rendered":"Photodiode amplifier"},"content":{"rendered":"<figure id=\"attachment_297\" aria-describedby=\"caption-attachment-297\" style=\"width: 300px\" class=\"wp-caption aligncentre\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/TransimpedanceSchematic-300x188.png\" alt=\"Electronic circuit\" width=\"300\" height=\"188\" class=\"size-medium wp-image-297\" srcset=\"https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/TransimpedanceSchematic-300x188.png 300w, https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/TransimpedanceSchematic.png 428w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-297\" class=\"wp-caption-text\">Photodiode amplifier<\/figcaption><\/figure>\n<figure id=\"attachment_310\" aria-describedby=\"caption-attachment-310\" style=\"width: 246px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436-246x300.jpg\" alt=\"Solar sensor\" width=\"246\" height=\"300\" class=\"size-medium wp-image-310\" srcset=\"https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436-246x300.jpg 246w, https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436-768x936.jpg 768w, https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436-841x1024.jpg 841w, https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436-624x760.jpg 624w, https:\/\/ejmilton.uk\/wp-content\/uploads\/2018\/09\/IMG_20180929_135632319_HDR-e1538225956436.jpg 2048w\" sizes=\"(max-width: 246px) 100vw, 246px\" \/><figcaption id=\"caption-attachment-310\" class=\"wp-caption-text\">Solar sensor<\/figcaption><\/figure>\n<p>A solar-powered external wall light is used as the housing for this solar sensor. This gives protection to IP44 and provides a means to recharge an internal 1.5v NiMH battery. The larger circuit board in the photo is derived from Project 2016-27 and provides 5 volts for the photodiode amplifier which is based on a standard transimpedance design.<\/p>\n<p><strong>Components used in photodiode amplifier<\/strong><br \/>\nOperational amplifier: AD820<br \/>\nSilicon photodiode: Ferranti MS600<br \/>\nR<sub>F<\/sub>: 20k<span>&#8486;<\/span> variable resistor<br \/>\nC<sub>F<\/sub>: 47pF<\/p>\n<p>External connections (5-way Rean Mini XLR plug):<br \/>\nPin 1: Photodiode output (blue in BT lead)<br \/>\nPin 5: GND (green in BT lead)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A solar-powered external wall light is used as the housing for this solar sensor. This gives protection to IP44 and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/posts\/305"}],"collection":[{"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/comments?post=305"}],"version-history":[{"count":13,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/posts\/305\/revisions"}],"predecessor-version":[{"id":322,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/posts\/305\/revisions\/322"}],"wp:attachment":[{"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/media?parent=305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/categories?post=305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ejmilton.uk\/index.php\/wp-json\/wp\/v2\/tags?post=305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}