Hunka Hunka Burning Love Posted May 27, 2016 Share Posted May 27, 2016 How secure are those hose clamps that you are using to fasten the housing to the pedals? That looks like it might be a weak spot which could fail during a crash? Quote Link to comment Share on other sites More sharing options...
esaj Posted May 27, 2016 Share Posted May 27, 2016 27 minutes ago, electric_vehicle_lover said: They don't provide that information but they say is for electric unicycles. I just bought 2 units because I am building 2 EGGs EUCs where I want to have lights. One thing that I miss is to known how much current this board can handle... I want to use high amperage LED. Didn't notice it being told anywhere, but probably not much, judging simply by the size of it. The converter I have is this: http://www.aliexpress.com/item/Step-down-Transformer-Electric-Bike-DC-Converter-Adapter-36V-48V-72V-TO-12V-10A/32358226204.html Said to handle 10A, but never tested it with that high amperage. 14 minutes ago, electric_vehicle_lover said: @esaj I have an idea: let's say the board outputs the speed and current value constantly, then other microcontroller can read that information and control the RGB led strip to make the brake light and flash the LEDs related with current speed :-) Not a big fan of the flashing leds myself (but brake light is a must) , but ways to implement this that popped into my mind would be measuring the current for example with a current shunt resistor (voltage drop over resistor) or something like the ACS712 -chips (up to 30A with the highest current model, it outputs a voltage-signal for the current, which can then be read by the microcontroller). If using the ACS, for safety, it should probably be paralleled with the real current wires (so even if the sensor fails, it won't cut power), but that will probably affect the reading (as only part of the current goes through the sensor) and needs to be corrected for in the software. Speed could probably be read with a reed-switch (like in bike computers) with a magnet attached to the tire... Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted May 27, 2016 Author Share Posted May 27, 2016 (edited) 4 hours ago, esaj said: Not a big fan of the flashing leds myself (but brake light is a must) , but ways to implement this that popped into my mind would be measuring the current for example with a current shunt resistor (voltage drop over resistor) or something like the ACS712 -chips (up to 30A with the highest current model, it outputs a voltage-signal for the current, which can then be read by the microcontroller). If using the ACS, for safety, it should probably be paralleled with the real current wires (so even if the sensor fails, it won't cut power), but that will probably affect the reading (as only part of the current goes through the sensor) and needs to be corrected for in the software. Speed could probably be read with a reed-switch (like in bike computers) with a magnet attached to the tire... The board have serial wire that goes to Bluetooth module, would be easy to wire the TX pin in parallel to be able to read the data... in the hope that speed is always an output. About the way you say, well, this MicroWorks 30B4 board already have 2 ACS714, for sure to read the current because I really believe the firmware implements FOC. So, the best is do our own firmware - you don't think is impossible, right? ;-) Edited May 27, 2016 by electric_vehicle_lover Quote Link to comment Share on other sites More sharing options...
esaj Posted May 27, 2016 Share Posted May 27, 2016 2 minutes ago, electric_vehicle_lover said: The board have serial wire that goes to Bluetooth module, would be easy to wire the TX pin in parallel to be able to read the data... in the hope that speed is always an output. Yeah, if it's like the older Gotways & King Songs, reading the data is fairly straight forward, as it they just keep repeating the values in same order at a steady rate. 2 minutes ago, electric_vehicle_lover said: About the way you say, well, this MicroWorks 30B4 board already have 2 ACS714, for sure to read the current because I really believe the firmware implements FOC. So, the best is do our own firmware - you don't think is impossible, right? ;-) Difficult, yes, impossible, no. Starting with a ready-made and known-to-work -board also helps, because then there's no need to second-guess whether the faults are in the circuitry or the software And scrounging up some volunteer test pilots... Or getting some serious body armor 2 Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted May 27, 2016 Author Share Posted May 27, 2016 (edited) 4 hours ago, HunkaHunkaBurningLove said: How secure are those hose clamps that you are using to fasten the housing to the pedals? That looks like it might be a weak spot which could fail during a crash? Well, they are metal and seem very strong. The first thing to broke in a crash should be the 3D printed plastic parts. I hope o find some kind of liquid glue to make a cover on the printed parts, to make them more strong!! Anyway, I can always decide to go with PETG wich is a more expensive: 3 minutes ago, esaj said: And scrounging up some volunteer test pilots... Or getting some serious body armor @esajEven if I trust to some degree on this chinese boards and firmware, I would trust more on my own firmware!!! Edited May 27, 2016 by electric_vehicle_lover 2 Quote Link to comment Share on other sites More sharing options...
Popular Post lizardmech Posted May 28, 2016 Popular Post Share Posted May 28, 2016 Have you thought about using the 3d printer to make a mold and lay carbon fiber over it? CF is pretty easy to use for small one of projects. 5 Quote Link to comment Share on other sites More sharing options...
Popular Post electric_vehicle_lover Posted May 29, 2016 Author Popular Post Share Posted May 29, 2016 (edited) It is ready to run baby!!! This is the 2nd version of the design that uses 2 battery packs but can go up to 5 battery packs!!! I will share later the 3D files and more information but now is time to go ride the EGG electric unicycle on the beach and enjoy the last hours of this nice Sunday :-) Edited May 29, 2016 by electric_vehicle_lover 5 Quote Link to comment Share on other sites More sharing options...
OliverH Posted May 29, 2016 Share Posted May 29, 2016 42 minutes ago, electric_vehicle_lover said: It is ready to run baby!!! This is the 2nd version of the design that uses 2 battery packs but can go up to 5 battery packs!!! I will share later the 3D files and more information but now is time to go ride the EGG electric unicycle on the beach and enjoy the last hours of this nice Sunday :-) After riding it you can forget any family planing It's way to big at that height. Can we see a moving you're riding it? 1 Quote Link to comment Share on other sites More sharing options...
Popular Post electric_vehicle_lover Posted May 29, 2016 Author Popular Post Share Posted May 29, 2016 That's a video of me riding - I always find some friend at the beach and so was easy to get a quick video :-) 7 Quote Link to comment Share on other sites More sharing options...
OliverH Posted May 29, 2016 Share Posted May 29, 2016 19 minutes ago, electric_vehicle_lover said: That's a video of me riding - I always find some friend at the beach and so was easy to get a quick video :-) Ohh. It looked so big on the pics. Great. 1 Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted May 29, 2016 Author Share Posted May 29, 2016 The beach were so nice today :-) 1 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted May 30, 2016 Share Posted May 30, 2016 (edited) Hey I wonder if it would be possible to make some custom pedals out of that PETG plastic. People seem to be wanting larger pedals for their EUCs. A 3D printed pedal might just be the answer as long as it is strong enough. I wonder though whether repeated lever stresses at the support axle area might end up cracking at that point? Also would it be a problem to screw on the axle retainers on either end? Edit:. Or maybe just printing a pedal overlay might work as long as it can be attached to the pedals securely. That way the existing pedal can act as a support while the plastic just extends the peripheries for a larger foot size. Edited May 31, 2016 by HunkaHunkaBurningLove 2 Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted May 30, 2016 Author Share Posted May 30, 2016 10 minutes ago, HunkaHunkaBurningLove said: Hey I wonder if it would be possible to make some custom pedals out of that PETG plastic. People seem to be wanting larger pedals for their EUCs. A 3D printed pedal might just be the answer as long as it is strong enough. I wonder though whether repeated lever stresses at the support axle area might end up cracking at that point? Also would it be a problem to screw on the axle retainers on either end? Nice idea! I really thing PETG is up to the task!!! Quote Link to comment Share on other sites More sharing options...
alon av Posted May 30, 2016 Share Posted May 30, 2016 Nice Work keep on having fun with it 1 Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted May 31, 2016 Share Posted May 31, 2016 I experimented with pedals a bit. 3d printing an entire pedal will not work, at the same size flange to mount to the wheel at 100% infill it failed at the mount. (Petg). I have been experimenting with extension ideas but haven't made one yet. 3 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted May 31, 2016 Share Posted May 31, 2016 (edited) Have you tried doing a PETG overlay that can be screwed over top of the pedals? Or I guess depending on the wheel, edge inserts like the corner protectors in this thread but just longer to extend the pedal size... Edited May 31, 2016 by HunkaHunkaBurningLove Quote Link to comment Share on other sites More sharing options...
Fernando Paulino Posted June 1, 2016 Share Posted June 1, 2016 (edited) Hello, I wanted to know if putting a motor on top of the wheel instead of a larger engine inside which the posibility to work? putting a smaller brushless out (in contact with the tire) could leave the cheaper the project? use an ESC and the driver of a drone? excuse me, for my bad English, and by my crazy idea, but I live in Brazil and this brushless motor comes here for 2 or 3 times the value, outside the entrance iposto the country Edited June 1, 2016 by Fernando Paulino 1 Quote Link to comment Share on other sites More sharing options...
chriscalandro Posted June 1, 2016 Share Posted June 1, 2016 I want to do an overlay that just extends the current pedals. I've been working on it but some other things are first. Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted June 1, 2016 Share Posted June 1, 2016 @Fernando Paulino This MIT guy made one and he also references another fellow who did something similar. https://www.stephanboyer.com/post/17/my-electric-unicycle Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted June 6, 2016 Author Share Posted June 6, 2016 Another design, just in time to Sunday outdoor activities :-) This version is more stable, because the 2 battery packs are on sides of the wheel - but the pedals clearance is good. The controller boards which is light, is on top (unfortunately the firmware can't be configured to be placed on horizontal). Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted June 7, 2016 Author Share Posted June 7, 2016 I Just received another package from MicroWorks, all the components to build another EGG EUC. I hope to have it ready until next Sunday. This one will be for my girlfriend. The family will have their EUCs: me, girlfriend and young son :-) 1 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted June 7, 2016 Share Posted June 7, 2016 (edited) Maybe tell Microworks about your project here and give them a link and share some photos. Sometimes building a bit of repoire might make them become more interested in providing you with a firmware flash that can orientate the control board horizontally which would open up a whole bunch of design possibilities for you. It's probably not a difficult thing to change in firmware. The public exposure no doubt helps them sell more boards to the DIY crowd. Edited June 7, 2016 by HunkaHunkaBurningLove 1 Quote Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted June 7, 2016 Author Share Posted June 7, 2016 Did that already ;-) I am not sure that DIY market is relevant for them. I have the expectation they will keep selling this components. They can costumize the firmware but that needs something that I am not interested. Anyway, VESC firmware is OpenSource and with high success on DIY electric skates, I hope to be able to bring VESC firmware to EUCs for the MicroWorks 30B4 boards (there are others similars on market). Quote Link to comment Share on other sites More sharing options...
RolluS Posted June 8, 2016 Share Posted June 8, 2016 On 26/02/2016 at 5:42 PM, OliverH said: The BT module looks like to the (HS-)HC-06 module, which is BT 2.0 EDR only (classic bluetooth) - not BT4.x smart/ low energy. Hi, I own a one wheel skateboard using a MW 30B board. I've tried a HC-05 module (6 pin) with no luck. I can pair, but the application provided by MicroWorks won't get any data. I guess I'm missing something with the 6th pin, which seems to be for validation (of AT commands?) Quote Link to comment Share on other sites More sharing options...
RolluS Posted June 8, 2016 Share Posted June 8, 2016 On 24/05/2016 at 10:35 AM, electric_vehicle_lover said: On current design, and after some optimizations, the space for legs is still low and so is a bit unconfortable to ride the EUC. I did a test to put the MicroWorks 30B4 electronic board on top horizontal and tried to calibrate, but the calibration don't work when the board is placed horizontally - I had that expectation because I tried other board GEN1 that worked. That's interesting because on my single wheel skateboard, the MW 30B (smaller heatsink, previous firmware version), the controller is mount horizontally: Sorry for the blurry pic. Here is the controller: 1 Quote Link to comment Share on other sites More sharing options...
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