Skateboard, RC cars and Robot

[changtimwu]

read later

http://www.makerfaire.com.tw/ https://www.facebook.com/makerfairetaipei/

boards

• http://longboard.com.tw/
• http://onboard.com.tw/

bots supporting scratch

compare

obot(fb group) with mbot

obot is going to have an arm companion

[changtimwu]

quite a lot of classes https://www.youtube.com/user/nctuocw http://ocw.nctu.edu.tw/course_list_search.php?s1=8&s2=&key= http://ocw.nctu.edu.tw/course_list_search.php?page=2&s1=2&s2=9&key=

http://ocw.nctu.edu.tw/course_detail.php?bgid=8&gid=0&nid=554#.WXwiFMb3XdQ

[changtimwu]

https://robotworkshop9.com

[changtimwu]

This is how skateboard turn. http://www.electric-skateboard.builders/t/swing-arm-steering-mechanism-for-mountainboard-how-and-would-it-work/16876 https://www.quora.com/How-do-skateboards-turn-what-is-the-mechanism

RC car suspesion structure http://www.beginningrc.com/components/car-truck-rc-suspension.php

[changtimwu]

about the truck curve(range of turning) https://www.youtube.com/watch?v=RORK-d6l5pA see mountain board related video to find wider truck https://www.youtube.com/watch?v=Jx4cmWykuwI

[changtimwu]

the famous VESC http://vedder.se/

survey of parts: http://www.electric-skateboard.builders/t/interesting-stuff-ive-found-on-taobao/24367

VESC 6 beta video http://www.trampaboards.com/vesc-6-complete--vedder-electronic-speed-controller-trampa-exclusive-p-24166.html http://vedder.se/forums/viewtopic.php?t=590 VESC6 open source discussion: http://www.electric-skateboard.builders/t/vedders-vesc-6-0/3813/906

[changtimwu]

should we https://dev.px4.io/en/

quite a lots RC platforms and parts. http://twarm.com/commerce/index.php?cPath=156_899 http://twarm.com/commerce/index.php?cPath=156_899_901 looks good http://twarm.com/commerce/product_info.php?cPath=156_899_901&products_id=13963

[changtimwu]

https://fpv.blue/ FPV analog video transmission latency https://fpv.blue/2016/09/fpv-latency-comparison-analog-vs-fpv-blue-vs-connex-prosight-vs-wifibroadcast/

more delay with USB. http://bbs.5imx.com/forum.php?mod=viewthread&tid=1254229

[changtimwu]

latency calculation ex. a 10KM/h selfdriving car.
10km/h = 101000/(6060) m/s = 2.777 m/s

typical FPV speed 1xx ~ 2xx KM/h

[changtimwu]

wifi broadcast https://befinitiv.wordpress.com/wifibroadcast-analog-like-transmission-of-live-video-data/

[changtimwu]

turning system

• typical turning head in skate cart https://v.qq.com/x/page/w0323hand44.html
• swing cart https://www.youtube.com/watch?v=19RDK9P3_DE

[changtimwu]

segway(hover board) alike vendor https://world.taobao.com/item/547709516116.htm?fromSite=main&spm=a312a.7700824.w4002-6525009810.25.6f1cbbceRxAnSS inside look. ESC on one side and battery on the other. https://www.youtube.com/watch?v=BKQ-EwZh2x0

hover board becomes swing car or go cart https://www.youtube.com/watch?v=36HbNiEpUVw https://www.youtube.com/watch?v=sgou7pn2KhE https://www.youtube.com/watch?v=v0YahJ22S30 https://www.youtube.com/watch?v=qcuA2VHeIZA

ESC for hoverboard https://world.taobao.com/item/45460982905.htm?spm=a1z3o.7695283.0.0.5e3b8166RYeyCT https://world.taobao.com/item/540029351258.htm?spm=a312a.7700714.0.0.675ba573RlfNRi#detail

wheel motor https://world.taobao.com/item/539899814955.htm?fromSite=main&spm=a312a.7728556.w4004-16689702246.21.566a90958mrsI5 discrete parts https://world.taobao.com/item/540661390801.htm?fromSite=main&spm=a312a.7728556.w4004-16689702246.5.566a909530SHYg

market report... https://wenku.baidu.com/view/7d5d5915daef5ef7bb0d3c31.html###

[changtimwu]

single wheel truck https://world.taobao.com/item/551835998906.htm?spm=a312a.7700714.0.0.675ba573tAUeYA#detail

[changtimwu]

reference board https://world.taobao.com/item/533950112158.htm?fromSite=main&spm=a312a.7728556.w4023-12528976573.4.566a9095PPIlk1

there seems quite a lot reference ESC boards. The original developer is taotao http://www.taotaozn.com/en/about.html https://www.1688.com/chanpin/-CBABC2D6C6BDBAE2B3B5BFD8D6C6C6F7.html

I should buy one https://detail.1688.com/offer/523977636852.html?spm=a2615.7691456.0.0.d3059e2AnDiiX

bluetooth hack https://read01.com/zh-tw/nxxkNAM.html#.Wa9An5Og8o8

[changtimwu]

lithium ion charge discharge http://www.rctw.net/thread-285472-1-1.html

[changtimwu]

ardupilot and rover https://www.youtube.com/playlist?list=PLUanGQl6Kmrji6xfSRpVWSo-qoCaW659x

fpv ardurover https://www.youtube.com/watch?v=YI9hBkzJtbM https://www.youtube.com/watch?v=3GhWc2si7YI

the Erle rover mentioned in ardupilot document http://ardupilot.org/rover/ http://ardupilot.org/rover/docs/gettit.html https://erlerobotics.com/blog/product/erle-rover/

assembly https://iristim.tian.yam.com/posts/27195288

[changtimwu]

Good smart RC http://www.donkeycar.com/ https://docs.google.com/document/d/11nu6_ReReoIxA1KVq-sCy7Tczbk6io0izcItucrw7hI/edit

quite a lot various info. some for 1/8 some for 1/10 https://makezine.com/projects/build-autonomous-rc-car-raspberry-pi/ https://www.amazon.com/2-4Ghz-Exceed-RC-Magnet-Electric/dp/9269803775/ref=wl_mb_wl_huc_mrai_2_dp https://github.com/otaviogood/carputer

[changtimwu]

various RC selfdriving

• https://www.youtube.com/watch?v=tOj53RRgtmg
• https://www.youtube.com/watch?v=cB_ez2MNHMo see how he places 2nd floor platform
• https://www.youtube.com/watch?v=VrIPLOlj_ps

another 2nd floor board just replace the case with an acrylic. keep the original supporting cylinders for the case. http://www.jetsonhacks.com/2016/07/05/jetson-racecar-10-motor-control-battery-discussion/ and the reason it use VESC instead stock ESC is that stock ESC always drive motor too high.(can't be lower than 7 miles/hour)

[changtimwu]

all six wheels

Wild Thumper

• https://www.youtube.com/watch?v=ALQGHVS9-L8
• https://www.youtube.com/watch?v=CUEcsZ8NL04
• https://www.robotgear.com.au/Product.aspx/Details/1978-Wild-Thumper-6WD-Chassis-Black-34-1-gear-ratio?gclid=CjwKEAiAirXFBRCQyvL279Tnx1ESJAB-G-QvE-d_2uQTEsca9RdetzCZYwnFaIpzZ9MFClF0L_BxBhoCEmfw_wcB

Tamiya Konghead

• https://www.youtube.com/watch?v=2SX86Srol7k
• https://www.youtube.com/watch?v=kyXBECGbIak&t=51s

HSP crawler

• https://www.youtube.com/watch?v=D6rcjpF-P04&list=PLnGaeXwhNUvlgRV9Ui5uQeItwlOyiEKKi&index=7
• https://www.youtube.com/watch?v=D6rcjpF-P04&t=308s&index=7&list=PLnGaeXwhNUvlgRV9Ui5uQeItwlOyiEKKi

Wltoys 18628/18629

• https://www.youtube.com/watch?v=Z2RBZJ5CKlc
• https://www.youtube.com/watch?v=TRrB6-m1w5s
• https://www.gearbest.com/rc-cars/pp_594767.html?lkid=10695522
• https://item.taobao.com/item.htm?id=543801316981&_u=t2dmg8j26111
• https://detail.tmall.com/item.htm?spm=a220m.1000858.0.0.22d5a9bbvicRNg&id=556781234232&skuId=3611689246033&areaId=440300&is_b=1&cat_id=2&q=%CE%B0%C1%A6

others

https://www.youtube.com/watch?v=qH7Btr5wuno https://www.youtube.com/watch?v=wK4yCUQz_mU

[changtimwu]

photos from diyrobotcars meetups are quite valuable

https://www.meetup.com/DIYRobocars/photos/

[changtimwu]

• toe link 後面那根
• camber link 前面那根
• toe in -- 內八, toe out -- 外八

假設車前後為 Y 軸, 左右為 X 軸, 上下為 Z軸

• 調整 camber angle 就是以Y 軸旋轉
• 調整 toe 就是以Z 軸旋轉

[changtimwu]

step motor guide https://doc.lagout.org/science/0_Computer%20Science/8_Electronics%20%26%20Robotics/Stepping%20Motors%20-%20A%20Guide%20to%20Theory%20and%20Practice.pdf