{"id":15818,"date":"2016-11-07T09:30:10","date_gmt":"2016-11-07T08:30:10","guid":{"rendered":"http:\/\/www.recantha.co.uk\/blog\/?p=15818"},"modified":"2016-11-05T15:49:21","modified_gmt":"2016-11-05T14:49:21","slug":"bare-conductives-pi-cap-proves-to-be-a-versatile-raspberry-pi-add-on","status":"publish","type":"post","link":"https:\/\/www.recantha.co.uk\/blog\/?p=15818","title":{"rendered":"Bare Conductive&#8217;s Pi Cap proves to be a versatile Raspberry Pi add-on"},"content":{"rendered":"<div id=\"attachment_15820\" style=\"width: 872px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15820\" class=\"size-full wp-image-15820\" src=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=560%2C287&#038;ssl=1\" alt=\"Bare Conductive Pi Cap - photograph by Adafruit\" width=\"560\" height=\"287\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?w=862&amp;ssl=1 862w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=300%2C154&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=768%2C394&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=560%2C287&amp;ssl=1 560w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=260%2C133&amp;ssl=1 260w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg?resize=160%2C82&amp;ssl=1 160w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/a><p id=\"caption-attachment-15820\" class=\"wp-caption-text\">Bare Conductive Pi Cap &#8211; photograph by Adafruit<\/p><\/div>\n<p><a href=\"https:\/\/www.bareconductive.com\/shop\/pi-cap\/\" target=\"_blank\">Bare Conductive&#8217;s Pi Cap<\/a>\u00a0is an add-on board for the Raspberry Pi that plugs into the GPIO pins. It provides the following features:<\/p>\n<ul>\n<li>12 conductive crocodile clip-compatible connection points<\/li>\n<li>High quality audio output via a 3.5mm jack<\/li>\n<li>A user-programmable RGB LED<\/li>\n<li>A tiny button<\/li>\n<li>7 unused GPIO pins broken out<\/li>\n<li>A prototyping area<\/li>\n<\/ul>\n<p>It is compatible with any of the 40-pin Raspberry Pis and comes with extensive programming libraries written in Python, C++ and NodeJS.<\/p>\n<p>Bare Conductive were kind enough to send me one of their Pi Caps and I&#8217;ve spent a few hours trying it out. I have to say I&#8217;m very impressed. It&#8217;s an interesting mixture of hardware features, certainly. In fact, at first glance the 3.5mm jack in particular seems like an odd addition. However, a closer look at some of the example scripts provided gives you a glimpse at the ways you could use the jack in combination with the conductive inputs.<\/p>\n<p>Installing the software is an easy process &#8211; a simple apt-get command and another setup command after that &#8211; and they provide great instructions online to get you going from first principals such as burning an operating system image onto an SD card to using the tutorial script provided. Speaking of which, the tutorial script is ingenious &#8211; it&#8217;s a text-based to some of the examples provided and you can see them working by touching the capacitive inputs. This gives you an &#8216;instant win&#8217; in terms of seeing the hardware working. The example code is well thought-outand useful and it shouldn&#8217;t take much for a beginner programmer to unpick the code and bend it to their own uses.<\/p>\n<p>The capacitive inputs work by touching the pads with your finger, or by connecting up conductive objects (bananas come to mind!) to the inputs. I used conductive ink to draw a line on the back of an envelope and connected a crocodile clip from the pad to the ink. That way, when I touched the ink the conductive input registered the touch. Just the job for simple experiments.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15822\" src=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=560%2C343&#038;ssl=1\" alt=\"miniature\" width=\"560\" height=\"343\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=300%2C184&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=768%2C470&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=1024%2C627&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=560%2C343&amp;ssl=1 560w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=260%2C159&amp;ssl=1 260w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?resize=160%2C98&amp;ssl=1 160w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/miniature.jpg?w=1120&amp;ssl=1 1120w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/a><\/p>\n<p>Breaking out the unused pins is, of course, a winner for any hacker of hardware, so this is good to see. 7 GPIOs should be enough to add LEDs, switches, even a buzzer and the prototyping area keeps everything neat. The addition of a tiny button on the side is a bit useless, but I guess good if you need it. The only negative thing I can say is that the button is on the inner side of the board so you need a pencil or something to reach it past the USB ports.<\/p>\n<p>The 3.5mm jack for audio provides a high-quality line-out output from the Pi. As I&#8217;ve said before, this may seem a strange addition but they provide an example of using the touch inputs to play sound, so turning the Pi Cap into a musical instrument with decent quality audio is a real possibility.<\/p>\n<p>The price, \u00a328, is a bit steep for an add-on board for the Pi, however there are such a lot of features, and the board is so versatile in terms of what you can use for inputs that I think it&#8217;s well worth it.<\/p>\n<p>Thoroughly recommended.<\/p>\n<p>You can <a href=\"https:\/\/www.bareconductive.com\/shop\/pi-cap\/\" target=\"_blank\">buy the Pi Cap from Bare Conductive<\/a> or <a href=\"https:\/\/thepihut.com\/products\/bare-conductive-picap\" target=\"_blank\">The Pi Hut<\/a>\u00a0for around \u00a328.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bare Conductive&#8217;s Pi Cap\u00a0is an add-on board for the Raspberry Pi that plugs into the GPIO pins. It provides the following features: 12 conductive crocodile clip-compatible connection points High quality audio output via a 3.5mm jack A user-programmable RGB LED&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4,80,20,44,62],"tags":[],"class_list":["post-15818","post","type-post","status-publish","format-standard","hentry","category-audio","category-blinkies","category-gpio-boards","category-reviews","category-sensors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bare Conductive&#039;s Pi Cap proves to be a versatile Raspberry Pi add-on - Raspberry Pi Pod<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bare Conductive&#039;s Pi Cap proves to be a versatile Raspberry Pi add-on - Raspberry Pi Pod\" \/>\n<meta property=\"og:description\" content=\"Bare Conductive&#8217;s Pi Cap\u00a0is an add-on board for the Raspberry Pi that plugs into the GPIO pins. It provides the following features: 12 conductive crocodile clip-compatible connection points High quality audio output via a 3.5mm jack A user-programmable RGB LED&hellip;Read more &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\" \/>\n<meta property=\"og:site_name\" content=\"Raspberry Pi Pod\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/recantha\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-11-07T08:30:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg\" \/>\n<meta name=\"author\" content=\"Michael Horne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@recantha\" \/>\n<meta name=\"twitter:site\" content=\"@recantha\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Michael Horne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\"},\"author\":{\"name\":\"Michael Horne\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/#\/schema\/person\/c27c4ef2ee1c18b130f1fcd5dcdbb263\"},\"headline\":\"Bare Conductive&#8217;s Pi Cap proves to be a versatile Raspberry Pi add-on\",\"datePublished\":\"2016-11-07T08:30:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\"},\"wordCount\":582,\"commentCount\":2,\"publisher\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/11\/picap-adafruit.jpg\",\"articleSection\":[\"Audio\",\"Blinkies\",\"GPIO boards\",\"Reviews\",\"Sensors\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.recantha.co.uk\/blog\/?p=15818#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\",\"url\":\"https:\/\/www.recantha.co.uk\/blog\/?p=15818\",\"name\":\"Bare Conductive's Pi Cap proves to be a versatile Raspberry Pi add-on - 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It gives an easy way to connect up wires to your Raspberry Pi's GPIO pins (via crocodile clips) and is designed to receive input from conductive sources. They sent me one recently, so I'll be doing a review in a little while. 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They've written a lovely little tutorial on how to do it yourself and have put the code on GitHub. If you want to do it \"properly\", you'll need to follow their screen printing tutorial\u00a0but\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/09\/pi_cap_midi.jpg?fit=720%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/09\/pi_cap_midi.jpg?fit=720%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/09\/pi_cap_midi.jpg?fit=720%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/09\/pi_cap_midi.jpg?fit=720%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":16962,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=16962","url_meta":{"origin":15818,"position":2},"title":"Connected, dreamy drawings using the Raspberry Pi and Bare Conductive&#8217;s PiCap","author":"Michael Horne","date":"22 June 2017","format":false,"excerpt":"Swedish artist, Rebecka Tollens\u00a0has collaborated with\u00a0Playtronica\u00a0to bring her \"Connected Drawings\" to life. As part of the Daydream \/ Darkness \/ Disgrace exhibition\u00a0in Paris, Rebecka created drawings to represent her dreams. She then made them interactive by using Bare Conductive's\u00a0Touch Board\u00a0and\u00a0Pi Cap\u00a0in 'proximity mode'. When different areas of the drawings were\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/06\/dreams_pi_cap.jpg?fit=980%2C450&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/06\/dreams_pi_cap.jpg?fit=980%2C450&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/06\/dreams_pi_cap.jpg?fit=980%2C450&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/06\/dreams_pi_cap.jpg?fit=980%2C450&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":13999,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=13999","url_meta":{"origin":15818,"position":3},"title":"Shutdown your Raspberry Pi using a paper clip","author":"Michael Horne","date":"8 January 2016","format":false,"excerpt":"When you're running your Raspberry Pi headless, one of the first things you should concern yourself with is how to shut it down safely.\u00a0Shutting it down by simply pulling the power out can result in a corrupt SD card or damaged files. If you had it connected to a network,\u2026","rel":"","context":"In &quot;Programming&quot;","block_context":{"text":"Programming","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=39"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/01\/paper-clip.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/01\/paper-clip.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/01\/paper-clip.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2016\/01\/paper-clip.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":18683,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=18683","url_meta":{"origin":15818,"position":4},"title":"New cooking add-on for the Raspberry Pi: presenting the pi-topCOOKER","author":"Michael Horne","date":"1 April 2018","format":false,"excerpt":"This was, obviously, an April Fools Day joke, courtesy of the good folks over at pi-top! Hope you enjoyed it as much as I did! Pure genius from pi-top\u00a0today. They have released a fantastic new add on for the Raspberry Pi. Called the pi-topCOOKER, it slides onto the rail of\u2026","rel":"","context":"In &quot;GPIO boards&quot;","block_context":{"text":"GPIO boards","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=20"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/04\/41OJcrN8O8L._SY450_.jpg?fit=450%2C450&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":13884,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=13884","url_meta":{"origin":15818,"position":5},"title":"Raspberry Pi DOTs boards now available","author":"Michael Horne","date":"15 December 2015","format":false,"excerpt":"The DOTs board, designed by the Foundation's Rachel Rayns, is now available to buy online. The board, which uses conductive paint in a dot-to-dot fashion, is supplied with a plugin for Minecraft Pi Edition which will draw the outline of the\u00a0aeroplane shown on the board. You can also use the\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.raspberrypi.org\/wp-content\/uploads\/2015\/12\/Screenshot-2015-12-07-15.57.37.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/15818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15818"}],"version-history":[{"count":3,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/15818\/revisions"}],"predecessor-version":[{"id":15823,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/15818\/revisions\/15823"}],"wp:attachment":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}