Search found 4496 matches

by izeman
Jan 23, 2018 3:57 am
Forum: Motor Technology
Topic: Show off your lebowski controller
Replies: 26
Views: 883

Re: Show off your lebowski controller

Lebowski wrote:
Jan 23, 2018 2:57 am
Which current sensors do you have, 100 A ?
i thought the same. but for 10kW and 100V he'd use 100A battery. so his current sensor may be 200A types.
and fortunately this is the limit of this type afaik.
by izeman
Jan 22, 2018 12:16 pm
Forum: Motor Technology
Topic: Show off your lebowski controller
Replies: 26
Views: 883

Re: Show off your lebowski controller

what powerlevel are you asking for?
by izeman
Jan 18, 2018 11:47 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

nothing really relevant to see on the video :) you should have mounted it filming the rear wheel. but nethertheless you are absolutely correct. kellys are totally different from those xie-chang controllers (especially with a long block time set). kellys will release their power very smoothly and con...
by izeman
Jan 17, 2018 10:37 am
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 256
Views: 11582

Re: BOSS LEVEL CUSTOM SPOT WELDER

or just use wider strips. there are 25mm wide strips available as well. they would be a perfect fit for 2 batteries side to side.
by izeman
Jan 16, 2018 7:16 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 68
Views: 1419

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

great work lebowski. if i didn't already have one of your fantastic controllers, i would build one immediately.
i hope that this project leads to many new user for your controller!
btw i just found a great source for pcbs: https://jlcpcb.com/ they are super cheap, especially for prototypes.
by izeman
Jan 11, 2018 10:04 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

why don't you put it directly under the seat? there seems to be some space, and cog should be better as well. or divide the pack up. half there, half there.
by izeman
Jan 09, 2018 9:56 am
Forum: E-Bike General Discussion
Topic: E-bike restricted trail access and hate
Replies: 34
Views: 1021

Re: E-bike restricted trail access and hate

The bike the OP is asking about looks like it has a nice suspension. The specs for the motor: The motor puts out a maximum of 250W of power and a peak of 70Nm of torque, 250W is certainly not going to tear up the trails, and would be considered pretty weak by my standards. 750W is allowed here in C...
by izeman
Dec 18, 2017 1:42 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

if it's freezing right now, and your battery is cold : imaging how good it will run in warm weather!! my lipo looses a lot of power when cold. at least double the voltage sag.
by izeman
Dec 18, 2017 6:49 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

yeah. was looking for the thread as well. couldn't find it.
by izeman
Dec 15, 2017 4:11 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

being so close shouldn't be an issue. if it ever hits the wheel it may just clip off some rubber :) but nothing worse should happen.
by izeman
Dec 15, 2017 6:44 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

your chain looks too loose. even if you install a chain tensioner. the chain tensioner will only stop the lower part of the chain from hitting the frame.
but it may be that the chain gets shorter when the suspension is compressed. so maybe it's ok. can't say from here :)
by izeman
Dec 13, 2017 9:19 am
Forum: General Discussion
Topic: can you help me source this LED?
Replies: 10
Views: 258

Re: can you help me source this LED?

You can get 1W or 3W individual LED emitters that are only about 8mm in diameter, and that have forward voltages of about 3.5V. Three or four of those epoxied to a 24mm disc heatsink of your liking, and soldered in series, would fit in the same package and do the same job. Add a resistor or a power...
by izeman
Dec 13, 2017 9:14 am
Forum: E-Bike General Discussion
Topic: Freewheel Maintenance
Replies: 19
Views: 558

Re: Freewheel Maintenance

I had one fail when the grease got sticky and the pawls didn't engage fully. Almost hurt myself when it slipped under load. It was good after just cleaning and re-greasing. It was the kind that comes apart. i'm not sure if we're talking about freewheels inside a geared hub motor, or about the freew...
by izeman
Dec 13, 2017 9:10 am
Forum: E-Bike General Discussion
Topic: Freewheel Maintenance
Replies: 19
Views: 558

Re: Freewheel Maintenance

fechter wrote:
Dec 11, 2017 3:09 pm
Just do a Google image search for Double D 40. :wink:
no idea what you're talking about. he's cleary speaking of a LUBRICATION PRODUCT.

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by izeman
Dec 13, 2017 4:29 am
Forum: General Discussion
Topic: can you help me source this LED?
Replies: 10
Views: 258

Re: can you help me source this LED?

ElectricGod wrote:
Dec 12, 2017 9:56 pm
... Does the LED fit in the same space and can it run off the same voltage and amps. If it can, then it's a match!
that's the point. the size is the issue. i can find LED PCBs in 20mm and 28mm size. but none with 24mm. no idea why. i know ordered the 20mm size and will see if i can fix it somehow.
by izeman
Dec 12, 2017 12:26 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 140
Views: 7303

Re: Apollo 250 Dirt Bike Conversion

the 12t is too small for sure :( great build btw! and yes, let your brother do the welding - he knows the stuff. and let him teach you how to do it, it's not that difficult. just needs some pratice. one question: how do you like the multistars? my turnigy packs are 4 years old now, and i need spares...
by izeman
Dec 08, 2017 4:12 pm
Forum: General Discussion
Topic: can you help me source this LED?
Replies: 10
Views: 258

Re: can you help me source this LED?

unfortunately it's not. the LEDs from the link you posted are those installed in torches.i've got some of them as well.
but the one i'm looking for is quite a bit bigger. the PCB is bigger, and the LED itself is about 3 times the size. :(
by izeman
Dec 08, 2017 12:12 pm
Forum: General Discussion
Topic: can you help me source this LED?
Replies: 10
Views: 258

Re: can you help me source this LED?

yes. found the company myself, but couldn't find the PCB only on their website.
seems they do special complete lamps only.
by izeman
Dec 08, 2017 10:47 am
Forum: General Discussion
Topic: can you help me source this LED?
Replies: 10
Views: 258

can you help me source this LED?

this is a led from a desk lamp. powered by a constant current power supply 12V 500mA. diameter of the PCB is 24mm. tried to find this thing on ebay or aliexpress but w/o success. no idea what to search for. i searched for "high power led" "12v 5W" "COB" "24mm" a combination of it ... any help would ...
by izeman
Dec 07, 2017 6:38 am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 512
Views: 42399

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

For holding you on a hill you must first hold the brakes to keep the car stopped for a sec you're sure it's holding the car with the motor? i guess it applies physical brakes as any other car does (including my ice bmw, or my wife's volvo ...), and releases the brakes as soon as you step on the acc...
by izeman
Dec 05, 2017 4:43 am
Forum: E-Vehicles General Discussion
Topic: looking for ideal base for electric car conversion
Replies: 35
Views: 1261

Re: looking for ideal base for electric car conversion

could be. been some time that he did it. it was transplanted into a pinzgauer 6x6. lot of other modifications as well: all 6 disc-brakes and power steering etc ... quite a nice rallye truck.
by izeman
Nov 29, 2017 8:12 am
Forum: Motor Technology
Topic: Show off your lebowski controller
Replies: 26
Views: 883

Re: Show off your lebowski controller

now that this thread is as offtopic as possible it will throw in my 2c as well. @electricgod: you're right. the ts-100 will never solder #6 or #8 wire. it's just too weak for it, and the tip mass is too small, so it will cool off too quickly. other than that's it's a perfect little iron. on the othe...
by izeman
Nov 28, 2017 2:18 am
Forum: E-Vehicles General Discussion
Topic: looking for ideal base for electric car conversion
Replies: 35
Views: 1261

Re: looking for ideal base for electric car conversion

at least an austrian car :) nice to see them again.
already did the other thing around. we planted an american 4.2l 6-zyl with automatic transmission into a pinzgauer ;)
by izeman
Nov 24, 2017 5:16 am
Forum: Motor Technology
Topic: Show off your lebowski controller
Replies: 26
Views: 883

Re: Show off your lebowski controller

well, your soldering doesn't look to good. that's correct ;) but it doesn't look bad enough to fall apart!!! i don't want to go into detail now, and start a new off topic discussion. i guess it might be low quality solder and/or wrong temperatures or too weak soldering iron. maybe if you open a new ...
by izeman
Nov 24, 2017 5:10 am
Forum: Motor Technology
Topic: Locking clutch/freewheel in geared hub motor for regen?
Replies: 17
Views: 474

Re: Locking clutch/freewheel in geared hub motor for regen?

litespeed makes a valid point: if you want regen: get a DD. if you want a small package sized high torque motor for a bike: go for the MAC. the problem i see with welded freewheel: you add complexity to such a simple design, which an electric motor is, by adding gears and a freewheel, and then you w...