{"id":310,"date":"2018-06-25T18:18:48","date_gmt":"2018-06-25T17:18:48","guid":{"rendered":"http:\/\/debaz.azzano.fr\/azzano\/?p=310"},"modified":"2019-01-20T15:33:21","modified_gmt":"2019-01-20T15:33:21","slug":"e-longboard","status":"publish","type":"post","link":"https:\/\/debaz.azzano.fr\/azzano\/e-longboard\/","title":{"rendered":"E-Longboard[Part 1]"},"content":{"rendered":"\n<p>Inspired by Casey Neistat and after being pulled one day by the electric bike of my mother I wanted to have an Electric Longboard (= Skateboard). Of course it would have been too easy to buy one then I tried to build my own.<\/p>\n\n\n\n<p>I started to buy the following components from Maytech.cn:<\/p>\n\n\n\n<ul><li>2 hub Motors :<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"485\" height=\"322\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-7.png\" alt=\"\" class=\"wp-image-261\"\/><\/figure>\n\n\n\n<!--more-->\n\n\n\n<p>Model NO.: MTO9055-HBM-60-HA<br>Motor KV \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u202660(RPM\/V)<br>Hole Size \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026M8<br>Motor w\/wheel dimension \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u03a690x55mm<br>Idle Current\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20260.4A<br>Max. Current \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 22A<br>Input Volt \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 24V\u201036V<br>Max. Output Wat \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 800W<br>RPM \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20262100<br>Motor Weight \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 950g:<br>Internal Resistance\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 0.557\u20100.577<br>With Hall Sensor<\/p>\n\n\n\n<ul><li>1 Double ESC (Bad Point : Parameters can\u2019t be changed)<\/li><li>1 Remote and receiver<\/li><li>2 spare wheels of the same size<\/li><li>2 trucks to mount the 4 wheels.<\/li><\/ul>\n\n\n\n<p>Quickly (&lt; 3h) the remote stopped working then I replaced it with a standard RC Car remote (https:\/\/hobbyking.com\/en_us\/quanum-2-4ghz-3ch-pistol-grip-tx-rx-system.html)<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"795\" height=\"610\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-9.png\" alt=\"\" class=\"wp-image-263\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-9.png 795w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-9-768x589.png 768w\" sizes=\"(max-width: 795px) 100vw, 795px\" \/><\/figure>\n\n\n\n<p>Any remote would work if the receiver output is PWM based. 1 Channel is enough but I wanted to get extra just in case to control optional things (light for example).<\/p>\n\n\n\n<p>I mounted all of that on my existing deck with some 3D Printed parts.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"307\" height=\"500\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/image-result-for-santa-cruz-longboard-rob-hand-bla-1.jpeg\" alt=\"Image result for Santa Cruz Longboard Rob Hand Black Drop Thru, 10.0 x 40.0 Zoll, SANLOBROHADTBL\" class=\"wp-image-265\"\/><\/figure><\/div>\n\n\n\n<p>Figure : My existing deck<\/p>\n\n\n\n<p>All went well for 2hours, happy with the maximum speed, the smoothness of the acceleration but not the braking. Too slow to stop you, I will definitively hit a car or a wall one day\u2026<\/p>\n\n\n\n<p>Unfortunately during a lap around a park the battery unplugged while I was braking, energy had to go somewhere and fried the esc.<\/p>\n\n\n\n<p>In total I spent few hours of Designing, 3D printing, debugging the non-working remote, soldering wire for 2 hours of use. It wasn\u2019t worth the money\/time I spent and I wasn\u2019t happy with the result. I had to do it again.<\/p>\n\n\n\n<p>At that time we are in November, even if I could build something quickly I won\u2019t be able to ride before few months. Therefore I decided to build my own deck with an integrated enclosure to store the electronics and the batteries correctly.<\/p>\n\n\n\n<p>I had the following big batteries (2 in series to give me 10s=42V 5Ah)<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"872\" height=\"723\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-12.png\" alt=\"\" class=\"wp-image-267\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-12.png 872w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-12-768x637.png 768w\" sizes=\"(max-width: 872px) 100vw, 872px\" \/><\/figure><\/div>\n\n\n\n<p>It was definitively too big for any enclosure, I will touch the ground if I turn. Therefore I bought many single cells to do my own pack of batteries<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"880\" height=\"722\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-13.png\" alt=\"\" class=\"wp-image-269\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-13.png 880w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-13-768x630.png 768w\" sizes=\"(max-width: 880px) 100vw, 880px\" \/><\/figure><\/div>\n\n\n\n<p>Then I got help from my friends Tom and Jim (Last wooden boat builder in Ireland, check their Twitter <a href=\"https:\/\/twitter.com\/ilenproject?lang=en\">https:\/\/twitter.com\/ilenproject?lang=en<\/a>) to build the new deck.<\/p>\n\n\n\n<h5>Building the deck :<\/h5>\n\n\n\n<p>The first step was to create a jig to give the shape to the new deck. I wanted to keep the dimensions and the curve of my actual deck (yes it is handy that your feet go naturally at the good position on the board). I had to make the jig wider than the future deck, otherwise the edges would have been nasty.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"508\" height=\"704\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-14.png\" alt=\"\" class=\"wp-image-271\"\/><\/figure><\/div>\n\n\n\n<p>Figure :&nbsp; I will use my actual deck + some extension to give the shape.<\/p>\n\n\n\n<p>Second step was to cut some white American ash in many thin slate of wood.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"510\" height=\"661\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-15.png\" alt=\"\" class=\"wp-image-273\"\/><\/figure><\/div>\n\n\n\n<p>Figure : two slates on top of my deck<\/p>\n\n\n\n<p>The plan is to stack 5 layer of slats with different angle to get flexibility and strength.<\/p>\n\n\n\n<p>The first and 5<sup>th<\/sup> layer will be at 0\u00b0, the second and 4<sup>th<\/sup> layer will be at 45\u00b0 and at -45\u00b0 and the 3<sup>rd<\/sup> layer will be at 90\u00b0. I used epoxy (with some fillers) to glue all the layers and I let it dry for a week.<\/p>\n\n\n\n<p>Plastic film is used to separate the jig to the wood, epoxy do not stick to the plastic.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"472\" height=\"570\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-16.png\" alt=\"\" class=\"wp-image-274\"\/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft\"><img loading=\"lazy\" width=\"676\" height=\"1202\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195258-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20171120_195258.jpg\" class=\"wp-image-276\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195258-jpg-1.jpeg 676w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195258-jpg-1-576x1024.jpeg 576w\" sizes=\"(max-width: 676px) 100vw, 676px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright\"><img loading=\"lazy\" width=\"676\" height=\"1202\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195254-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20171120_195254.jpg\" class=\"wp-image-277\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195254-jpg-1.jpeg 676w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171120_195254-jpg-1-576x1024.jpeg 576w\" sizes=\"(max-width: 676px) 100vw, 676px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1510\" height=\"554\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-17.png\" alt=\"\" class=\"wp-image-278\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-17.png 1510w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-17-1024x376.png 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-17-768x282.png 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-17-1260x462.png 1260w\" sizes=\"(max-width: 1510px) 100vw, 1510px\" \/><\/figure><\/div>\n\n\n\n<p>Figure : Side View<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"420\" height=\"615\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-18.png\" alt=\"\" class=\"wp-image-280\"\/><\/figure><\/div>\n\n\n\n<p>Figure : All glued, the old deck is here to draw the external lines.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"488\" height=\"808\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-19.png\" alt=\"\" class=\"wp-image-281\"\/><\/figure><\/div>\n\n\n\n<p>Figure : we can see the curve and the different layers here.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1428\" height=\"803\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_191421-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20171219_191421.jpg\" class=\"wp-image-282\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_191421-jpg-1.jpeg 1428w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_191421-jpg-1-1024x576.jpeg 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_191421-jpg-1-768x432.jpeg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_191421-jpg-1-1260x709.jpeg 1260w\" sizes=\"(max-width: 1428px) 100vw, 1428px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1428\" height=\"803\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202749-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20171219_202749.jpg\" class=\"wp-image-284\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202749-jpg-1.jpeg 1428w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202749-jpg-1-1024x576.jpeg 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202749-jpg-1-768x432.jpeg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202749-jpg-1-1260x709.jpeg 1260w\" sizes=\"(max-width: 1428px) 100vw, 1428px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1428\" height=\"803\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202755-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20171219_202755.jpg\" class=\"wp-image-286\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202755-jpg-1.jpeg 1428w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202755-jpg-1-1024x576.jpeg 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202755-jpg-1-768x432.jpeg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20171219_202755-jpg-1-1260x709.jpeg 1260w\" sizes=\"(max-width: 1428px) 100vw, 1428px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1237\" height=\"1649\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20180327_184718-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20180327_184718.jpg\" class=\"wp-image-288\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20180327_184718-jpg-1.jpeg 1237w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20180327_184718-jpg-1-768x1024.jpeg 768w\" sizes=\"(max-width: 1237px) 100vw, 1237px\" \/><\/figure><\/div>\n\n\n\n<p> Once it has been dry just had to cut it with a Jig saw, sand it, clean it, glue 4 pieces of wood at the back and mount the trucks.   <\/p>\n\n\n\n<p>For the lid I used a marine-graded plywood 6mm, thin enough to bend but not to break. And to fix it to the box I installed some insert to avoid destroying the wood with wood screw.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img src=\"https:\/\/cdn.mscdirect.com\/global\/images\/ProductImages\/0914251-23.jpg\" alt=\"Image result for wood insert screw\"\/><\/figure><\/div>\n\n\n\n<p>I also decided to paint the longboard with an aluminium primer for three reasons. First the epoxy is UV sensible and even if there are not that much sun in Ireland I still want to keep it for a long time.&nbsp; Primer was the good type of paint to use and I only had the aluminium color. The last reason was to make it looks like the silver surfer now \ud83d\ude42<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft\"><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215819.jpg\"><img loading=\"lazy\" width=\"3120\" height=\"4160\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215819.jpg\" alt=\"\" class=\"wp-image-314\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215819.jpg 3120w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215819-768x1024.jpg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215819-1260x1680.jpg 1260w\" sizes=\"(max-width: 3120px) 100vw, 3120px\" \/><\/a><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215813.jpg\"><img loading=\"lazy\" width=\"3120\" height=\"4160\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215813.jpg\" alt=\"\" class=\"wp-image-315\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215813.jpg 3120w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215813-768x1024.jpg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180424_215813-1260x1680.jpg 1260w\" sizes=\"(max-width: 3120px) 100vw, 3120px\" \/><\/a><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>At that time we are in April, time to start the electronics otherwise I won\u2019t ride before the next summer.<\/p>\n\n\n\n<h5>The electronics<\/h5>\n\n\n\n<p>Thankfully an open source project was already famous. The project VESC by Benjamin Vedder will fit perfectly for my needs.<\/p>\n\n\n\n<p>I used the last fully released version (4.12) after modifying the layout to have a square version of the PCB and 2 extra GPIO. The PCB has been made by Cirly, my previous company. (Thanks a million to them !)<\/p>\n\n\n\n<p>Link to the VESC project : <a href=\"http:\/\/vedder.se\/2015\/01\/vesc-open-source-esc\/\">http:\/\/vedder.se\/2015\/01\/vesc-open-source-esc\/<\/a><\/p>\n\n\n\n<p>Link to Cirly : <a href=\"http:\/\/en.cirly.com\/\">http:\/\/en.cirly.com\/<\/a><\/p>\n\n\n\n<p>After few hours of soldering (Thanks to Wojtek for helping me with the processor) I was able to flash the bootloader and the software with a Nucleo board which was taking the dust.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1268\" height=\"714\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105837-bmp-1.png\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG-20042018-105837.bmp\" class=\"wp-image-290\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105837-bmp-1.png 1268w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105837-bmp-1-1024x577.png 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105837-bmp-1-768x432.png 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105837-bmp-1-1260x709.png 1260w\" sizes=\"(max-width: 1268px) 100vw, 1268px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1276\" height=\"718\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105732-bmp-1.png\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG-20042018-105732.bmp\" class=\"wp-image-293\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105732-bmp-1.png 1276w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105732-bmp-1-1024x576.png 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105732-bmp-1-768x432.png 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img-20042018-105732-bmp-1-1260x709.png 1260w\" sizes=\"(max-width: 1276px) 100vw, 1276px\" \/><\/figure><\/div>\n\n\n\n<pre class=\"wp-block-preformatted\">Using the nucleo as a programmer :\n\nI removed the 0Ohms resistor as described here: <a href=\"https:\/\/jeelabs.org\/book\/1547a\/\">https:\/\/jeelabs.org\/book\/1547a\/<\/a>\n\nSWD connector doesn\u2019t bring the power for the chip, you can plug the top wire to the jumper PWR near.\n\nI had to flash the file named FW+ BL to see a COM port and then uploading the last firmware from Benjamin\u2019s tool. (Version HW 410 = 411 = 412)\n\nI used the software provided by ST to upload the file.\n\n<a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/en.stsw-link004-1.zip\">en.stsw-link004 (1)<\/a>\n\n<a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/VESC_FW_AND_BL_092017-1.zip\">VESC_FW_AND_BL_092017 (1)<\/a><\/pre>\n\n\n\n<p>It was time to try that with the motors:<\/p>\n\n\n<div style=\"width: 720px;\" class=\"wp-video\"><!--[if lt IE 9]><script>document.createElement('video');<\/script><![endif]-->\n<video class=\"wp-video-shortcode\" id=\"video-310-1\" width=\"720\" height=\"1280\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/VID_20180426_182109.mp4?_=1\" \/><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/VID_20180426_182109.mp4\">https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/VID_20180426_182109.mp4<\/a><\/video><\/div>\n\n\n\n<p>And to create the pack of batteries : I didn\u2019t have a spot welder then I just soldered the metal tabs.<\/p>\n\n\n\n<h6>Pack of batteries<\/h6>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"684\" height=\"912\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20180427_181635-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20180427_181635.jpg\" class=\"wp-image-294\"\/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"684\" height=\"912\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/c-users-gazzano-downloads-img_20180427_181639-jpg-1.jpeg\" alt=\"C:\\Users\\gazzano\\Downloads\\IMG_20180427_181639.jpg\" class=\"wp-image-295\"\/><\/figure><\/div>\n\n\n\n<p>I created two packs of 4 batteries (max thickness) and 1 pack of two batteries (to get 10S).<\/p>\n\n\n\n<p>First I used some foam to keep the electronic safe for the first runs.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"1140\" height=\"369\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-23.png\" alt=\"\" class=\"wp-image-296\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-23.png 1140w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-23-1024x331.png 1024w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-23-768x249.png 768w\" sizes=\"(max-width: 1140px) 100vw, 1140px\" \/><\/figure><\/div>\n\n\n\n<p>Then I duct tape them (I had some overheating issue, I had to free the space)<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"678\" height=\"462\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-24.png\" alt=\"\" class=\"wp-image-297\"\/><\/figure><\/div>\n\n\n\n<p>Figure : Batteries + old BMS from an old ebike battery found in the bin<\/p>\n\n\n\n<p>The overheating issue was still there and the duct tape was nasty, I decided to epoxy\/screw everything and to do some aluminum heatsink. The MOS are pressed with some thermal paste to 2 layer of aluminum for cooling.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" width=\"554\" height=\"748\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/word-image-25.png\" alt=\"\" class=\"wp-image-298\"\/><\/figure><\/div>\n\n\n\n<p>Figure without thermal paste<\/p>\n\n\n\n<h6>Other components:<\/h6>\n\n\n\n<p>I added a Bluetooth module (hm-10) to monitor the temperature and I\u2019m now able to climb some hills without overheating too much. (Thanks Ackmaniac for his fantastic app)<\/p>\n\n\n\n<p>Link to the thread on esk8: http:\/\/www.electric-skateboard.builders\/t\/vesc-monitor-android-app\/20888<\/p>\n\n\n\n<p>Thanks to my old robotic team I got a second version of the BMS from the old ebike batteries which has a integrated switch. (we bought them to the scrapyard 1 year ago).<\/p>\n\n\n\n<p>Thanks to Galileo-CPE Lyon (https:\/\/galileo-cpe.net\/)<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180509_190438.jpg\"><img loading=\"lazy\" width=\"3120\" height=\"4160\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180509_190438.jpg\" alt=\"\" class=\"wp-image-305\" srcset=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180509_190438.jpg 3120w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180509_190438-768x1024.jpg 768w, https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/IMG_20180509_190438-1260x1680.jpg 1260w\" sizes=\"(max-width: 3120px) 100vw, 3120px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>The BMS is based on a OZ8940 with no datasheet available. It looks like there is a i2c communication but the manufacturers doesn&#8217;t want to share the datasheet then I will wait for more free time before reverse engineering it. It is still working as it is and it will correctly handle the charge balancing of the cells.<\/p>\n\n\n\n<p>To avoid a spark (High amount of capacitors empty) I also have a second switch button to connect the power with few kOhms resistors. these resistor will allow a small amount of current, pre-load the capacitors and avoid the spark.<\/p>\n\n\n\n<p>Now the board is fully working, after few try I decided to add some grip tape on the top, the rain make it slippy.<\/p>\n\n\n\n<p>The next steps will be to buy a charger, for now I use CC\/CV Lab PSU which are not easy to carry. Also a new remote system with a nice screen to merge the BT connection and the old remote is on its way.<\/p>\n\n\n<div style=\"width: 1260px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-310-2\" width=\"1260\" height=\"709\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018_05_22_21_34_11_1.mp4?_=2\" \/><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018_05_22_21_34_11_1.mp4\">https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018_05_22_21_34_11_1.mp4<\/a><\/video><\/div>\n\n\n<div style=\"width: 1260px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-310-3\" width=\"1260\" height=\"709\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018-06-26_07-53-54_geboard_esc_video_2.mp4?_=3\" \/><a href=\"https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018-06-26_07-53-54_geboard_esc_video_2.mp4\">https:\/\/debaz.azzano.fr\/azzano\/wp-content\/uploads\/2018\/06\/2018-06-26_07-53-54_geboard_esc_video_2.mp4<\/a><\/video><\/div>\n\n\n\n<p>Maximum speed limited at 40km\/h, if you want more you will need to tight more the kingpin and you will turn wider.<\/p>\n\n\n\n<p>Range : Estimated 14km never been more than 10km on a single charge.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Inspired by Casey Neistat and after being pulled one day by the electric bike of my mother I wanted to have an Electric Longboard (= Skateboard). Of course it would have been too easy to buy one then I tried to build my own. I started to buy the following components from Maytech.cn: 2 hub&hellip; <\/p>\n<p class=\"toivo-read-more\"><a href=\"https:\/\/debaz.azzano.fr\/azzano\/e-longboard\/\" class=\"more-link\">Read more <span class=\"screen-reader-text\">E-Longboard[Part 1]<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/posts\/310"}],"collection":[{"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/comments?post=310"}],"version-history":[{"count":15,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/posts\/310\/revisions"}],"predecessor-version":[{"id":430,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/posts\/310\/revisions\/430"}],"wp:attachment":[{"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/media?parent=310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/categories?post=310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/debaz.azzano.fr\/azzano\/wp-json\/wp\/v2\/tags?post=310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}