{"id":24752,"date":"2017-03-22T06:28:40","date_gmt":"2017-03-22T10:28:40","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=24752"},"modified":"2017-03-22T06:28:40","modified_gmt":"2017-03-22T10:28:40","slug":"usb-battery-pack-keep-alive-load-kit","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/03\/usb-battery-pack-keep-alive-load-kit\/","title":{"rendered":"USB Battery Pack Keep-Alive Load Kit"},"content":{"rendered":"<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/USB-Keep-Alive-e1490099557713.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-24754\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/USB-Keep-Alive-1024x768.jpg\" alt=\"\" width=\"625\" height=\"469\" \/><\/a><\/p>\n<p>(Source: <a href=\"http:\/\/www.southgatearc.org\/news\/2017\/march\/usb-battery-pack-keep-alive-load.htm\" target=\"_blank\">Southgate ARC<\/a>)<\/p>\n<blockquote><p>USB power banks are a convenient way of powering low power USB devices in the field. Unfortunately, as they are designed for charging phones and tablets, many have an internal electronic cut out circuit that switches power off below a certain current draw. The exact current that they switch off at varies from pack to pack.<\/p>\n<p>Although there are circuits on the internet that purport to solve this problem by applying a pulsed load, we found this did not work with all power banks. As a result we designed a neat variable electronic load to address this problem.<\/p>\n<p>Available as a kit, using it is easy; just plug it into your power bank, plug your target device into it and adjust the current draw until the pack remains on.<\/p>\n<p><a href=\"http:\/\/www.sotabeams.co.uk\/usb-battery-pack-keep-alive-load-kit\/\" target=\"_blank\">http:\/\/www.sotabeams.co.uk\/usb-battery-pack-keep-alive-load-kit\/<\/a><\/p><\/blockquote>\n<p>This could be a handy tool for those of us who use USB battery packs for portable work. SotaBeams originally created this simple kit for the <a href=\"http:\/\/www.sotabeams.co.uk\/wsprlite\" target=\"_blank\">WSPRlite<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>(Source: Southgate ARC) USB power banks are a convenient way of powering low power USB devices in the field. Unfortunately, as they are designed for charging phones and tablets, many have an internal electronic cut out circuit that switches power off below a certain current draw. The exact current that they switch off at varies [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","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":[344,836,3],"tags":[4095,6044,6042,6043],"class_list":["post-24752","post","type-post","status-publish","format-standard","hentry","category-kits","category-new-products","category-news","tag-kits","tag-sotabeams","tag-usb","tag-usb-power"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-6re","jetpack-related-posts":[{"id":30494,"url":"https:\/\/swling.com\/blog\/2018\/01\/anils-hack-using-a-smart-phone-battery-bank-to-power-portable-receivers\/","url_meta":{"origin":24752,"position":0},"title":"Anil&#8217;s hack: Using a smart phone battery bank to power portable receivers","author":"Thomas","date":"January 25, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Anil Raj, who writes: I wanted to share a small but useful hack with your readers. I use a common garden variety smartphone \u201cPowerbank\u201d 10,000 mAH Li Ion pack to power my Sony 7600GR which is perfectly happy with the 5V which the pack\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Anil-Sony-ICF-SW7600GR-Battery-Bank-1024x768.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Anil-Sony-ICF-SW7600GR-Battery-Bank-1024x768.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Anil-Sony-ICF-SW7600GR-Battery-Bank-1024x768.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":33644,"url":"https:\/\/swling.com\/blog\/2018\/08\/qrp-labs-announces-the-qsx-transceiver\/","url_meta":{"origin":24752,"position":1},"title":"QRP Labs Announces The QSX Transceiver","author":"Thomas","date":"August 20, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Pete Eaton (WB9FLW), who writes: QRP Labs has just announced the QSX an All-Band All-Mode Transceiver Kit that should be available later this year. The Target price for the 10 Band Model is $150, also available will be a 40 Meter version for $75.00.\u2026","rel":"","context":"In &quot;Ham Radio&quot;","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/QSX-Transceiver-e1534763262905.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/QSX-Transceiver-e1534763262905.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/QSX-Transceiver-e1534763262905.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/QSX-Transceiver-e1534763262905.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":7037,"url":"https:\/\/swling.com\/blog\/2013\/08\/jeff-designs-an-sdr-go-kit-around-the-softrock-ensemble\/","url_meta":{"origin":24752,"position":2},"title":"Jeff designs an SDR &#8220;Go Kit&#8221; around the Softrock Ensemble","author":"Thomas","date":"August 12, 2013","format":false,"excerpt":"Jeffrey Fritz (WB1AAL) contacted me with details about his SDR (Software Defined Radio) \"Go Kit\" and has kindly allowed me to post it. Jeff writes: As a reader of the SWLing blog, I know that you are very interested in SDR. And you probably know that a \"Go Kit\" is\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"SoftrockGoKit1","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2013\/08\/SoftrockGoKit1-300x202.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":11615,"url":"https:\/\/swling.com\/blog\/2014\/12\/using-the-elad-fdm-s2-on-the-99-hp-stream-7-tablet\/","url_meta":{"origin":24752,"position":3},"title":"Using the Elad FDM-S2 on the $99 HP Stream 7 tablet","author":"Thomas","date":"December 5, 2014","format":false,"excerpt":"Regarding the Elad FDM-S2, Guy Atkins\u00a0comments: \"This week I bought an HP Stream 7 tablet from the local Microsoft Store for $99, and it runs my Elad FDM-S2 receiver great! This recently introduced tablet is the perhaps the lowest priced new computer with Windows 8.1. I can even record the\u2026","rel":"","context":"In &quot;How To&quot;","block_context":{"text":"How To","link":"https:\/\/swling.com\/blog\/category\/how-to\/"},"img":{"alt_text":"The HP Stream 7 Windows 8.1 tablet","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/12\/stream-tab-7-188x300.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":10293,"url":"https:\/\/swling.com\/blog\/2014\/07\/designing-a-truly-portable-sdr\/","url_meta":{"origin":24752,"position":4},"title":"Designing a truly portable SDR","author":"Thomas","date":"July 16, 2014","format":false,"excerpt":"SWLing Post reader, London Shortwave, is working on a portable SDR (software defined radio) system based on his Toshiba Encore 8\" Windows tablet, FunCube Dongle Pro+, and supported by the excellent SDR# application. Today, he shared this photo of his entire kit, including his comments. If you're interested in a\u2026","rel":"","context":"In &quot;How To&quot;","block_context":{"text":"How To","link":"https:\/\/swling.com\/blog\/category\/how-to\/"},"img":{"alt_text":"LondonShortwave-Portable","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/LondonShortwave-Portable.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/LondonShortwave-Portable.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/LondonShortwave-Portable.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/LondonShortwave-Portable.jpg?resize=700%2C400 2x"},"classes":[]},{"id":39328,"url":"https:\/\/swling.com\/blog\/2019\/08\/the-ham-radio-workbench-12-vdc-power-distribution-strip-kit\/","url_meta":{"origin":24752,"position":5},"title":"The Ham Radio Workbench 12 VDC Power Distribution Strip Kit","author":"Thomas","date":"August 26, 2019","format":false,"excerpt":"I had a number of important plans and goals yesterday which I conveniently set aside to build kits instead. Have you ever had one of those days? Building kits is a little like therapy for me. I find it relaxing, fun, and it gives me an opportunity to tune out\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/08\/HamRadioWorkbech-PowerPole-Distributon-Center-top-899x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/08\/HamRadioWorkbech-PowerPole-Distributon-Center-top-899x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/08\/HamRadioWorkbech-PowerPole-Distributon-Center-top-899x1024.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/24752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=24752"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/24752\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=24752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=24752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=24752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}