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by Ypedal
Jul 15 2016 8:34am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1690
Views: 273633

Re: Thread for new battery breakthrough PR releases

The 4% thing is what made me to WTF ???? first time i saw the commercial..... :lol:
by Ypedal
Jul 01 2016 11:48am
Forum: EBike Reviews & Testing
Topic: A2B Metro - www.ultramotor.com - Video Page4
Replies: 411
Views: 95439

Re: A2B Metro - www.ultramotor.com - Video Page4

Hey, anybody reading this that have 3rd party controllers on their Metro, what speeds do you get on level ground at 36v ? I gutted the controller from one and am using a Grinfineon, getting 23 kph on the flats ( at 36v operating voltage ) instead of the expected 30 kph... wondering if this is typica...
by Ypedal
Jun 29 2016 7:52pm
Forum: General Discussion
Topic: Slow-mo video shenanigans ..
Replies: 19
Views: 984

Re: Slow-mo video shenanigans ..

Part 5

https://www.youtube.com/watch?v=NcRVNH4vp_Q



*edit : I just moved this form OTD to general as some friends wanted to see it, who are not typical ES bunch..
by Ypedal
Jun 24 2016 12:50pm
Forum: EBike Technical
Topic: Neon sign transformer fried Hall throttle ? FULL ON
Replies: 16
Views: 990

Re: Neon sign transformer fried Hall throttle ? FULL ON

very interesting !!!.... experiments in my future :twisted:
by Ypedal
Jun 24 2016 11:00am
Forum: EV Business World
Topic: Ideas about opening up an electric bicycle store.
Replies: 37
Views: 21211

Re: Ideas about opening up an electric bicycle store.

jimw1960 wrote:How To Make $1 Million

Step 1: Start with $2 million

Step 2: Open an ebike shop.
:lol: :lol: :lol: :cry:
by Ypedal
Jun 22 2016 4:15pm
Forum: General Discussion
Topic: Slow-mo video shenanigans ..
Replies: 19
Views: 984

Re: Slow-mo video shenanigans ..

if anyone has any suggestions for cool slow motion stuff to try, we are always looking for more ideas... something that happens fast ( 1000 fps recorded, played back at 30 fps... so think 1 to 3 seconds of action, fire is cool, sparks.. ( I have a big bank of capacitors i want to mess with, but need...
by Ypedal
Jun 21 2016 5:07pm
Forum: EBike Technical
Topic: Neon sign transformer fried Hall throttle ? FULL ON
Replies: 16
Views: 990

Re: Neon sign transformer fried Hall throttle ? FULL ON

Ha... we said the same thing.. but sadly no, it was not caught on camera... mabe we can stage a recreation lol I can see how the EMP might make the throttle act up, but permanently fry it from 3~4ft away ? in a full on state ?.... i've had hall throttles fail and no longer work, but never one that w...
by Ypedal
Jun 21 2016 3:47pm
Forum: EBike Technical
Topic: Neon sign transformer fried Hall throttle ? FULL ON
Replies: 16
Views: 990

Neon sign transformer fried Hall throttle ? FULL ON

So yesterday after getting back form a rip on a few of my bikes, me and a friend were messing around with his high speed camera and making arcs using a high voltage Neon sign transformer, some silicone wire with ends stranded apart for extra effect.... All of a sudden, my KMX trike ( 100v X5 on lipo...
by Ypedal
Jun 19 2016 8:28pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2799

Re: Thoughts on possible bad "shark" pack

could be a number of things, but my best guess is a weak cell in that highest voltage group, less capacity means it hits 3.0v first, and also 4.20 first... bench test will confirm .. If.. " IF " you are lucky and the other groups hit 3.0v first, then it's a balancing issue and easily corre...
by Ypedal
Jun 19 2016 8:13pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2799

Re: Thoughts on possible bad "shark" pack

the highest voltage group is likely hitting 4.20v first and causing the bms to shut down before the other groups get to full, plug in the charger and test the groups while the charger is working to confirm.
by Ypedal
Jun 16 2016 8:57am
Forum: EBike Reviews & Testing
Topic: A2B Metro - www.ultramotor.com - Video Page4
Replies: 411
Views: 95439

Re: A2B Metro - www.ultramotor.com - Video Page4

If you use the stock A or B batteries, a 6 fet at 20 amps will do fine..

if you use higher power capable batteries a 12fet at 35/40 amp will have more oompf.. and the motor can take it.
by Ypedal
Jun 14 2016 9:06am
Forum: EBike General Discussion
Topic: KMX, could climb... or not
Replies: 13
Views: 1520

Re: KMX, could climb... or not

More Power is not the problem... Traction is ! :D

https://www.youtube.com/watch?v=AJnPxF9hpSI

by Ypedal
Jun 05 2016 6:41am
Forum: General Discussion
Topic: Slow-mo video shenanigans ..
Replies: 19
Views: 984

Re: Slow-mo video shenanigans ..

oh wow...

Like a fish in water, during winter months, the colder and snowier it gets, the harder it is to keep Smurf in the house... he just loves the cold.. LOVES IT ...
by Ypedal
May 25 2016 7:57pm
Forum: Battery Technology
Topic: Break in for 18650B Panasonic
Replies: 18
Views: 1259

Re: Break in for 18650B Panasonic

Well, assuming you got a pile of these cells to build a pack, that were acquired as a batch, all sitting for equal amounts of time, the good one's that will get along well together should stand out.. and really bad one's that self discharge horribly will be obvious as well. The process i used ( when...
by Ypedal
May 25 2016 7:29pm
Forum: Battery Technology
Topic: Break in for 18650B Panasonic
Replies: 18
Views: 1259

Re: Break in for 18650B Panasonic

Only to weed out possible duds... lithium cells seems to either be good.. not not good.. conditioning not required imo..
by Ypedal
May 23 2016 5:02pm
Forum: General Discussion
Topic: Slow-mo video shenanigans ..
Replies: 19
Views: 984

Re: Slow-mo video shenanigans ..

It's called a " Woosh bottle " .. i'm testing various alcohol concentrations but you only get one shot before you have to vent and dry the bottle for a 2nd shot so no back-to-back testing...
by Ypedal
May 20 2016 7:49pm
Forum: EBike General Discussion
Topic: Hobby King Turnigy wires
Replies: 12
Views: 1054

Re: Hobby King Turnigy wires

For years, i got everything as one length from HK, but last shipment ( a few months ago ) everything was in 1 meter bags, i got 20 pcs 1m long, each in a zip lock bag.. i would rather skip the zip bags and get more product.. but i highly suspect this is to keep the packers honest and to tighten down...
by Ypedal
May 07 2016 5:58pm
Forum: General Discussion
Topic: Me and Smurf made the news today
Replies: 7
Views: 1052

Re: Me and Smurf made the news today

Thanks guys.. And Amber, :cry: .... loosing a best friend is the hardest thing eve... ... sorry to hear the news.. :cry: .. Smurf will never replace Sandy, however he does provide endless happy moments and great company to carry the torch... .. like just now, an ambulance went by sirens blaring and ...
by Ypedal
May 04 2016 9:16am
Forum: Battery Technology
Topic: battery use or bin
Replies: 5
Views: 460

Re: battery use or bin

that's one twisted mess i would store in a safe place ( outside ) and use for occasional bench testing.. but otherwise invest in a proper pack and ride happily ever after.. i would not spend a dime on that thing.